Delay-Doppler communications: principles and applications
Gespeichert in:
| Hauptverfasser: | , , |
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| Format: | Elektronisch E-Book |
| Sprache: | English |
| Veröffentlicht: |
London, United Kingdom ; San Diego, CA, United States ; Cambridge, MA, United States ; Kidlington, Oxford, United Kingdom
Academic Press, an imprint of Elsevier
[2022]
|
| Online-Zugang: | DE-91 |
| Beschreibung: | Description based on publisher supplied metadata and other sources |
| Beschreibung: | 1 Online-Ressource (xx, 240 Seiten) Illustrationen, Diagramme |
| ISBN: | 9780323859660 |
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| 100 | 1 | |a Hong, Yi |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Delay-Doppler communications |b principles and applications |c Yi Hong, Tharaj Thaj, Emanuele Viterbo |
| 264 | 1 | |a London, United Kingdom ; San Diego, CA, United States ; Cambridge, MA, United States ; Kidlington, Oxford, United Kingdom |b Academic Press, an imprint of Elsevier |c [2022] | |
| 264 | 4 | |c © 2022 | |
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| 505 | 8 | |a Front Cover -- Delay-Doppler Communications -- Copyright -- Contents -- List of figures -- Biography -- Yi Hong -- Tharaj Thaj -- Emanuele Viterbo -- Preface -- 1 Introduction -- 1.1 High-mobility wireless channels -- 1.2 Waveforms for high-mobility wireless channels -- 1.3 Bibliographical notes -- References -- 2 High-mobility wireless channels -- 2.1 Input-output model of the wireless channel -- 2.1.1 Geometric model -- 2.1.2 Delay-Doppler representation -- 2.2 Continuous-time baseband channel model -- 2.3 Discrete-time baseband channel model -- 2.4 Relation among different channel representations -- 2.5 Channel models for numerical simulations -- 2.5.1 Standard wireless mobile multipath propagation scenarios -- 2.5.2 Synthetic propagation scenario -- 2.6 Bibliographical notes -- References -- 3 OFDM review and its limitations -- 3.1 Introduction -- 3.2 OFDM system model -- 3.2.1 Generalized multicarrier modulation -- 3.2.2 OFDM transmitter -- 3.3 OFDM frequency domain input-output relation -- 3.4 Advantages and disadvantages of OFDM -- 3.4.1 High PAPR -- 3.4.2 High OOB -- 3.4.3 Sensitivity to CFO -- 3.5 OFDM in high-mobility multipath channels -- 3.6 Bibliographical notes -- References -- 4 Delay-Doppler modulation -- 4.1 System model -- 4.1.1 Parameter choice for OTFS systems -- 4.1.2 OTFS modulation -- 4.1.3 High-mobility channel distortion -- 4.1.4 OTFS demodulation -- 4.2 OTFS input-output relation with ideal waveforms -- 4.2.1 Time-frequency domain analysis -- 4.2.2 Delay-Doppler domain analysis -- 4.3 Matrix formulation for OTFS -- 4.3.1 OTFS modulation -- 4.3.2 OTFS modulation via the IDZT -- 4.3.3 OTFS demodulation -- 4.3.4 OTFS demodulation via the DZT -- 4.4 OTFS input-output relations in vectorized form -- 4.4.1 Time domain input-output relation -- 4.4.2 Time-frequency input-output relation -- 4.4.3 Delay-time input-output relation | |
| 505 | 8 | |a 4.4.4 Delay-Doppler input-output relation -- 4.5 Variants of OTFS -- 4.5.1 Reduced ZP OTFS -- RZP-OTFS: time domain analysis -- RZP-OTFS: delay-time domain analysis -- RZP-OTFS: delay-Doppler domain analysis -- RZP-OTFS: fractional delay and fractional Doppler shifts -- RZP-OTFS: integer delay and fractional Doppler shifts -- RZP-OTFS: integer delay and integer Doppler shifts -- 4.5.2 Reduced CP-OTFS -- RCP-OTFS: time domain analysis -- RCP-OTFS: delay-time and delay-Doppler domain analysis -- 4.5.3 CP-OTFS -- CP-OTFS: time domain analysis -- CP-OTFS: delay-time domain analysis -- CP-OTFS: delay-Doppler domain analysis -- CP-OTFS: fractional delay and fractional Doppler shifts -- CP-OTFS: integer delay and fractional Doppler shifts -- CP-OTFS: integer delay and integer Doppler shifts -- 4.5.4 ZP-OTFS -- ZP-OTFS: time domain analysis -- ZP-OTFS: delay-time and delay-Doppler domain analysis -- 4.6 Summary of channel representations and input-output relations for OTFS variants -- 4.6.1 Channel representations for OTFS variants -- 4.6.2 Delay-Doppler input-output relations for OTFS variants -- 4.6.3 Comparison of OTFS variants -- 4.7 Bibliographical notes -- References -- 5 Zak transform analysis for delay-Doppler communications -- 5.1 A brief review of the different Fourier transforms -- 5.2 The Zak transform -- 5.2.1 Properties of the Zak transform -- 5.2.2 The inverse Zak transform -- 5.3 The delay-Doppler basis functions -- 5.4 Zak transform in delay-Doppler communications -- 5.4.1 Single path delay-Doppler channel -- 5.4.2 Multipath and general delay-Doppler channel -- 5.4.3 Band- and time-limited delay-Doppler basis functions -- 5.4.3.1 Bandlimited basis functions -- 5.4.3.2 Time limited basis functions -- 5.4.3.3 Band- and time-limited basis functions -- 5.4.4 Communications using band- and time-limited signals -- 5.5 The discrete Zak transform | |
| 505 | 8 | |a 5.5.1 The inverse discrete Zak transform -- 5.5.2 Properties of the DZT -- 5.6 DZT in delay-Doppler communications -- 5.6.1 Receiver sampling -- 5.6.2 Time-windowing at RX and TX -- 5.6.3 RCP-OTFS with rectangular Tx and Rx window -- 5.6.4 RZP-OTFS with rectangular Tx and Rx window -- 5.7 Bibliographical notes -- References -- 6 Detection methods -- 6.1 Overview of OTFS input-output relation -- 6.2 Single-tap frequency domain equalizer -- 6.2.1 Single-tap equalizer for RCP-OTFS -- 6.2.2 Block-wise single-tap equalizer for CP-OTFS -- 6.2.3 Complexity -- 6.3 Linear minimum mean-square error detection -- 6.3.1 Delay-Doppler domain LMMSE detection -- 6.3.2 Time domain LMMSE detection -- 6.3.3 Complexity -- 6.4 Message passing detection -- 6.4.1 Message passing detection algorithm -- 6.4.2 Complexity -- 6.5 Maximum-ratio combining detection -- 6.5.1 Delay-Doppler domain MRC detection -- 6.5.2 Complexity -- Delay-Doppler implementation complexity -- Initial step complexity -- 6.5.3 Reduced complexity delay-time domain implementation -- 6.5.4 Complexity -- Delay-time implementation complexity -- Initial step complexity -- 6.5.5 Low complexity initial estimate -- Complexity for initial estimate -- 6.5.6 MRC detection for other OTFS variants -- 6.6 Iterative rake turbo decoder -- 6.7 Illustrative results and discussion -- 6.8 Bibliographical notes -- References -- 7 Channel estimation methods -- 7.1 Introduction -- 7.2 Embedded pilot delay-Doppler channel estimation -- 7.2.1 The integer Doppler case -- 7.2.2 The fractional Doppler case -- 7.2.3 Effect of channel estimation on spectral efficiency -- 7.3 Embedded pilot-aided delay-time domain channel estimation -- 7.3.1 Pilot placement -- 7.3.2 Delay-time channel estimation -- 7.3.3 Channel estimation complexity -- 7.3.4 Extension to other OTFS variants | |
| 505 | 8 | |a 7.4 Real-time OTFS software-defined radio implementation -- 7.4.1 Effect of DC offset on channel estimation -- 7.4.2 Effect of carrier frequency offset on channel estimation -- 7.4.3 Experiment setup, results, and discussion -- 7.5 Bibliographical notes -- References -- 8 MIMO and multiuser OTFS -- 8.1 Introduction -- 8.2 System model for MIMO-OTFS -- 8.2.1 Transmitter and receiver -- 8.2.2 Channel -- 8.2.3 Input-output relation for MIMO-OTFS -- 8.2.3.1 Time domain -- 8.2.3.2 Delay-Doppler domain -- 8.2.3.3 Delay-time domain -- 8.3 Detection methods -- 8.3.1 Linear minimum mean-square error detector -- 8.3.2 Message passing detector -- 8.3.3 Maximum-ratio combining detector -- 8.3.3.1 Delay-Doppler domain MRC detection -- 8.3.3.2 Reduced complexity delay-time domain implementation -- 8.3.3.3 MRC detection complexity -- 8.4 MIMO-OTFS channel estimation -- 8.5 Multiuser OTFS channel estimation -- 8.6 Numerical results and discussion -- 8.7 Bibliographical notes -- References -- 9 Conclusions and future directions -- 9.1 OTFS key advantages -- 9.2 Pros and cons of OTFS variants -- 9.3 Other research directions -- 9.3.1 Channel estimation and PAPR reduction -- 9.3.2 Channels with fast time-varying delay-Doppler paths -- 9.3.3 Multiuser communications -- 9.3.4 Massive MIMO-OTFS -- 9.3.5 OTFS for RadCom -- 9.3.6 Orthogonal time sequency multiplexing and precoding design -- 9.3.7 Machine learning for OTFS -- References -- A Notation and acronyms -- B Some useful matrix properties -- B.1 The DFT matrix -- B.2 Permutation matrices -- B.3 Circulant matrices -- B.4 Linear and circular convolutions -- B.5 2D transforms, doubly circulant block matrices, and 2D circular convolution -- C Some MATLAB code and examples -- C.1 Transmitter -- C.2 Channel -- C.3 Receiver -- C.4 Generate G matrix and received signal for OTFS variants -- Index -- Back Cover | |
| 700 | 1 | |a Thaj, Tharaj |e Verfasser |4 aut | |
| 700 | 1 | |a Viterbo, Emanuele |e Verfasser |0 (DE-588)1164476459 |4 aut | |
| 776 | 0 | 8 | |i Erscheint auch als |a Hong, Yi |t Delay-Doppler Communications |d San Diego : Elsevier Science & Technology,c2022 |n Druck-Ausgabe |z 978-0-323-85028-5 |
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Datensatz im Suchindex
| _version_ | 1805069245368762368 |
|---|---|
| adam_text | |
| adam_txt | |
| any_adam_object | |
| any_adam_object_boolean | |
| author | Hong, Yi Thaj, Tharaj Viterbo, Emanuele |
| author_GND | (DE-588)1164476459 |
| author_facet | Hong, Yi Thaj, Tharaj Viterbo, Emanuele |
| author_role | aut aut aut |
| author_sort | Hong, Yi |
| author_variant | y h yh t t tt e v ev |
| building | Verbundindex |
| bvnumber | BV048221853 |
| classification_rvk | ZN 6560 |
| classification_tum | ELT 710 |
| collection | ZDB-30-PQE |
| contents | Front Cover -- Delay-Doppler Communications -- Copyright -- Contents -- List of figures -- Biography -- Yi Hong -- Tharaj Thaj -- Emanuele Viterbo -- Preface -- 1 Introduction -- 1.1 High-mobility wireless channels -- 1.2 Waveforms for high-mobility wireless channels -- 1.3 Bibliographical notes -- References -- 2 High-mobility wireless channels -- 2.1 Input-output model of the wireless channel -- 2.1.1 Geometric model -- 2.1.2 Delay-Doppler representation -- 2.2 Continuous-time baseband channel model -- 2.3 Discrete-time baseband channel model -- 2.4 Relation among different channel representations -- 2.5 Channel models for numerical simulations -- 2.5.1 Standard wireless mobile multipath propagation scenarios -- 2.5.2 Synthetic propagation scenario -- 2.6 Bibliographical notes -- References -- 3 OFDM review and its limitations -- 3.1 Introduction -- 3.2 OFDM system model -- 3.2.1 Generalized multicarrier modulation -- 3.2.2 OFDM transmitter -- 3.3 OFDM frequency domain input-output relation -- 3.4 Advantages and disadvantages of OFDM -- 3.4.1 High PAPR -- 3.4.2 High OOB -- 3.4.3 Sensitivity to CFO -- 3.5 OFDM in high-mobility multipath channels -- 3.6 Bibliographical notes -- References -- 4 Delay-Doppler modulation -- 4.1 System model -- 4.1.1 Parameter choice for OTFS systems -- 4.1.2 OTFS modulation -- 4.1.3 High-mobility channel distortion -- 4.1.4 OTFS demodulation -- 4.2 OTFS input-output relation with ideal waveforms -- 4.2.1 Time-frequency domain analysis -- 4.2.2 Delay-Doppler domain analysis -- 4.3 Matrix formulation for OTFS -- 4.3.1 OTFS modulation -- 4.3.2 OTFS modulation via the IDZT -- 4.3.3 OTFS demodulation -- 4.3.4 OTFS demodulation via the DZT -- 4.4 OTFS input-output relations in vectorized form -- 4.4.1 Time domain input-output relation -- 4.4.2 Time-frequency input-output relation -- 4.4.3 Delay-time input-output relation 4.4.4 Delay-Doppler input-output relation -- 4.5 Variants of OTFS -- 4.5.1 Reduced ZP OTFS -- RZP-OTFS: time domain analysis -- RZP-OTFS: delay-time domain analysis -- RZP-OTFS: delay-Doppler domain analysis -- RZP-OTFS: fractional delay and fractional Doppler shifts -- RZP-OTFS: integer delay and fractional Doppler shifts -- RZP-OTFS: integer delay and integer Doppler shifts -- 4.5.2 Reduced CP-OTFS -- RCP-OTFS: time domain analysis -- RCP-OTFS: delay-time and delay-Doppler domain analysis -- 4.5.3 CP-OTFS -- CP-OTFS: time domain analysis -- CP-OTFS: delay-time domain analysis -- CP-OTFS: delay-Doppler domain analysis -- CP-OTFS: fractional delay and fractional Doppler shifts -- CP-OTFS: integer delay and fractional Doppler shifts -- CP-OTFS: integer delay and integer Doppler shifts -- 4.5.4 ZP-OTFS -- ZP-OTFS: time domain analysis -- ZP-OTFS: delay-time and delay-Doppler domain analysis -- 4.6 Summary of channel representations and input-output relations for OTFS variants -- 4.6.1 Channel representations for OTFS variants -- 4.6.2 Delay-Doppler input-output relations for OTFS variants -- 4.6.3 Comparison of OTFS variants -- 4.7 Bibliographical notes -- References -- 5 Zak transform analysis for delay-Doppler communications -- 5.1 A brief review of the different Fourier transforms -- 5.2 The Zak transform -- 5.2.1 Properties of the Zak transform -- 5.2.2 The inverse Zak transform -- 5.3 The delay-Doppler basis functions -- 5.4 Zak transform in delay-Doppler communications -- 5.4.1 Single path delay-Doppler channel -- 5.4.2 Multipath and general delay-Doppler channel -- 5.4.3 Band- and time-limited delay-Doppler basis functions -- 5.4.3.1 Bandlimited basis functions -- 5.4.3.2 Time limited basis functions -- 5.4.3.3 Band- and time-limited basis functions -- 5.4.4 Communications using band- and time-limited signals -- 5.5 The discrete Zak transform 5.5.1 The inverse discrete Zak transform -- 5.5.2 Properties of the DZT -- 5.6 DZT in delay-Doppler communications -- 5.6.1 Receiver sampling -- 5.6.2 Time-windowing at RX and TX -- 5.6.3 RCP-OTFS with rectangular Tx and Rx window -- 5.6.4 RZP-OTFS with rectangular Tx and Rx window -- 5.7 Bibliographical notes -- References -- 6 Detection methods -- 6.1 Overview of OTFS input-output relation -- 6.2 Single-tap frequency domain equalizer -- 6.2.1 Single-tap equalizer for RCP-OTFS -- 6.2.2 Block-wise single-tap equalizer for CP-OTFS -- 6.2.3 Complexity -- 6.3 Linear minimum mean-square error detection -- 6.3.1 Delay-Doppler domain LMMSE detection -- 6.3.2 Time domain LMMSE detection -- 6.3.3 Complexity -- 6.4 Message passing detection -- 6.4.1 Message passing detection algorithm -- 6.4.2 Complexity -- 6.5 Maximum-ratio combining detection -- 6.5.1 Delay-Doppler domain MRC detection -- 6.5.2 Complexity -- Delay-Doppler implementation complexity -- Initial step complexity -- 6.5.3 Reduced complexity delay-time domain implementation -- 6.5.4 Complexity -- Delay-time implementation complexity -- Initial step complexity -- 6.5.5 Low complexity initial estimate -- Complexity for initial estimate -- 6.5.6 MRC detection for other OTFS variants -- 6.6 Iterative rake turbo decoder -- 6.7 Illustrative results and discussion -- 6.8 Bibliographical notes -- References -- 7 Channel estimation methods -- 7.1 Introduction -- 7.2 Embedded pilot delay-Doppler channel estimation -- 7.2.1 The integer Doppler case -- 7.2.2 The fractional Doppler case -- 7.2.3 Effect of channel estimation on spectral efficiency -- 7.3 Embedded pilot-aided delay-time domain channel estimation -- 7.3.1 Pilot placement -- 7.3.2 Delay-time channel estimation -- 7.3.3 Channel estimation complexity -- 7.3.4 Extension to other OTFS variants 7.4 Real-time OTFS software-defined radio implementation -- 7.4.1 Effect of DC offset on channel estimation -- 7.4.2 Effect of carrier frequency offset on channel estimation -- 7.4.3 Experiment setup, results, and discussion -- 7.5 Bibliographical notes -- References -- 8 MIMO and multiuser OTFS -- 8.1 Introduction -- 8.2 System model for MIMO-OTFS -- 8.2.1 Transmitter and receiver -- 8.2.2 Channel -- 8.2.3 Input-output relation for MIMO-OTFS -- 8.2.3.1 Time domain -- 8.2.3.2 Delay-Doppler domain -- 8.2.3.3 Delay-time domain -- 8.3 Detection methods -- 8.3.1 Linear minimum mean-square error detector -- 8.3.2 Message passing detector -- 8.3.3 Maximum-ratio combining detector -- 8.3.3.1 Delay-Doppler domain MRC detection -- 8.3.3.2 Reduced complexity delay-time domain implementation -- 8.3.3.3 MRC detection complexity -- 8.4 MIMO-OTFS channel estimation -- 8.5 Multiuser OTFS channel estimation -- 8.6 Numerical results and discussion -- 8.7 Bibliographical notes -- References -- 9 Conclusions and future directions -- 9.1 OTFS key advantages -- 9.2 Pros and cons of OTFS variants -- 9.3 Other research directions -- 9.3.1 Channel estimation and PAPR reduction -- 9.3.2 Channels with fast time-varying delay-Doppler paths -- 9.3.3 Multiuser communications -- 9.3.4 Massive MIMO-OTFS -- 9.3.5 OTFS for RadCom -- 9.3.6 Orthogonal time sequency multiplexing and precoding design -- 9.3.7 Machine learning for OTFS -- References -- A Notation and acronyms -- B Some useful matrix properties -- B.1 The DFT matrix -- B.2 Permutation matrices -- B.3 Circulant matrices -- B.4 Linear and circular convolutions -- B.5 2D transforms, doubly circulant block matrices, and 2D circular convolution -- C Some MATLAB code and examples -- C.1 Transmitter -- C.2 Channel -- C.3 Receiver -- C.4 Generate G matrix and received signal for OTFS variants -- Index -- Back Cover |
| ctrlnum | (ZDB-30-PQE)EBC6887217 (ZDB-30-PAD)EBC6887217 (ZDB-89-EBL)EBL6887217 (OCoLC)1299382780 (DE-599)BVBBV048221853 |
| dewey-full | 621.38456 |
| dewey-hundreds | 600 - Technology (Applied sciences) |
| dewey-ones | 621 - Applied physics |
| dewey-raw | 621.38456 |
| dewey-search | 621.38456 |
| dewey-sort | 3621.38456 |
| dewey-tens | 620 - Engineering and allied operations |
| discipline | Elektrotechnik Elektrotechnik / Elektronik / Nachrichtentechnik |
| discipline_str_mv | Elektrotechnik Elektrotechnik / Elektronik / Nachrichtentechnik |
| format | Electronic eBook |
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numerical simulations -- 2.5.1 Standard wireless mobile multipath propagation scenarios -- 2.5.2 Synthetic propagation scenario -- 2.6 Bibliographical notes -- References -- 3 OFDM review and its limitations -- 3.1 Introduction -- 3.2 OFDM system model -- 3.2.1 Generalized multicarrier modulation -- 3.2.2 OFDM transmitter -- 3.3 OFDM frequency domain input-output relation -- 3.4 Advantages and disadvantages of OFDM -- 3.4.1 High PAPR -- 3.4.2 High OOB -- 3.4.3 Sensitivity to CFO -- 3.5 OFDM in high-mobility multipath channels -- 3.6 Bibliographical notes -- References -- 4 Delay-Doppler modulation -- 4.1 System model -- 4.1.1 Parameter choice for OTFS systems -- 4.1.2 OTFS modulation -- 4.1.3 High-mobility channel distortion -- 4.1.4 OTFS demodulation -- 4.2 OTFS input-output relation with ideal waveforms -- 4.2.1 Time-frequency domain analysis -- 4.2.2 Delay-Doppler domain analysis -- 4.3 Matrix formulation for OTFS -- 4.3.1 OTFS modulation -- 4.3.2 OTFS modulation via the IDZT -- 4.3.3 OTFS demodulation -- 4.3.4 OTFS demodulation via the DZT -- 4.4 OTFS input-output relations in vectorized form -- 4.4.1 Time domain input-output relation -- 4.4.2 Time-frequency input-output relation -- 4.4.3 Delay-time input-output relation</subfield></datafield><datafield tag="505" ind1="8" ind2=" "><subfield code="a">4.4.4 Delay-Doppler input-output relation -- 4.5 Variants of OTFS -- 4.5.1 Reduced ZP OTFS -- RZP-OTFS: time domain analysis -- RZP-OTFS: delay-time domain analysis -- RZP-OTFS: delay-Doppler domain analysis -- RZP-OTFS: fractional delay and fractional Doppler shifts -- RZP-OTFS: integer delay and fractional Doppler shifts -- RZP-OTFS: integer delay and integer Doppler shifts -- 4.5.2 Reduced CP-OTFS -- RCP-OTFS: time domain analysis -- RCP-OTFS: delay-time and delay-Doppler domain analysis -- 4.5.3 CP-OTFS -- CP-OTFS: time domain analysis -- CP-OTFS: delay-time domain analysis -- CP-OTFS: delay-Doppler domain analysis -- CP-OTFS: fractional delay and fractional Doppler shifts -- CP-OTFS: integer delay and fractional Doppler shifts -- CP-OTFS: integer delay and integer Doppler shifts -- 4.5.4 ZP-OTFS -- ZP-OTFS: time domain analysis -- ZP-OTFS: delay-time and delay-Doppler domain analysis -- 4.6 Summary of channel representations and input-output relations for OTFS variants -- 4.6.1 Channel representations for OTFS variants -- 4.6.2 Delay-Doppler input-output relations for OTFS variants -- 4.6.3 Comparison of OTFS variants -- 4.7 Bibliographical notes -- References -- 5 Zak transform analysis for delay-Doppler communications -- 5.1 A brief review of the different Fourier transforms -- 5.2 The Zak transform -- 5.2.1 Properties of the Zak transform -- 5.2.2 The inverse Zak transform -- 5.3 The delay-Doppler basis functions -- 5.4 Zak transform in delay-Doppler communications -- 5.4.1 Single path delay-Doppler channel -- 5.4.2 Multipath and general delay-Doppler channel -- 5.4.3 Band- and time-limited delay-Doppler basis functions -- 5.4.3.1 Bandlimited basis functions -- 5.4.3.2 Time limited basis functions -- 5.4.3.3 Band- and time-limited basis functions -- 5.4.4 Communications using band- and time-limited signals -- 5.5 The discrete Zak transform</subfield></datafield><datafield tag="505" ind1="8" ind2=" "><subfield code="a">5.5.1 The inverse discrete Zak transform -- 5.5.2 Properties of the DZT -- 5.6 DZT in delay-Doppler communications -- 5.6.1 Receiver sampling -- 5.6.2 Time-windowing at RX and TX -- 5.6.3 RCP-OTFS with rectangular Tx and Rx window -- 5.6.4 RZP-OTFS with rectangular Tx and Rx window -- 5.7 Bibliographical notes -- References -- 6 Detection methods -- 6.1 Overview of OTFS input-output relation -- 6.2 Single-tap frequency domain equalizer -- 6.2.1 Single-tap equalizer for RCP-OTFS -- 6.2.2 Block-wise single-tap equalizer for CP-OTFS -- 6.2.3 Complexity -- 6.3 Linear minimum mean-square error detection -- 6.3.1 Delay-Doppler domain LMMSE detection -- 6.3.2 Time domain LMMSE detection -- 6.3.3 Complexity -- 6.4 Message passing detection -- 6.4.1 Message passing detection algorithm -- 6.4.2 Complexity -- 6.5 Maximum-ratio combining detection -- 6.5.1 Delay-Doppler domain MRC detection -- 6.5.2 Complexity -- Delay-Doppler implementation complexity -- Initial step complexity -- 6.5.3 Reduced complexity delay-time domain implementation -- 6.5.4 Complexity -- Delay-time implementation complexity -- Initial step complexity -- 6.5.5 Low complexity initial estimate -- Complexity for initial estimate -- 6.5.6 MRC detection for other OTFS variants -- 6.6 Iterative rake turbo decoder -- 6.7 Illustrative results and discussion -- 6.8 Bibliographical notes -- References -- 7 Channel estimation methods -- 7.1 Introduction -- 7.2 Embedded pilot delay-Doppler channel estimation -- 7.2.1 The integer Doppler case -- 7.2.2 The fractional Doppler case -- 7.2.3 Effect of channel estimation on spectral efficiency -- 7.3 Embedded pilot-aided delay-time domain channel estimation -- 7.3.1 Pilot placement -- 7.3.2 Delay-time channel estimation -- 7.3.3 Channel estimation complexity -- 7.3.4 Extension to other OTFS variants</subfield></datafield><datafield tag="505" ind1="8" ind2=" "><subfield code="a">7.4 Real-time OTFS software-defined radio implementation -- 7.4.1 Effect of DC offset on channel estimation -- 7.4.2 Effect of carrier frequency offset on channel estimation -- 7.4.3 Experiment setup, results, and discussion -- 7.5 Bibliographical notes -- References -- 8 MIMO and multiuser OTFS -- 8.1 Introduction -- 8.2 System model for MIMO-OTFS -- 8.2.1 Transmitter and receiver -- 8.2.2 Channel -- 8.2.3 Input-output relation for MIMO-OTFS -- 8.2.3.1 Time domain -- 8.2.3.2 Delay-Doppler domain -- 8.2.3.3 Delay-time domain -- 8.3 Detection methods -- 8.3.1 Linear minimum mean-square error detector -- 8.3.2 Message passing detector -- 8.3.3 Maximum-ratio combining detector -- 8.3.3.1 Delay-Doppler domain MRC detection -- 8.3.3.2 Reduced complexity delay-time domain implementation -- 8.3.3.3 MRC detection complexity -- 8.4 MIMO-OTFS channel estimation -- 8.5 Multiuser OTFS channel estimation -- 8.6 Numerical results and discussion -- 8.7 Bibliographical notes -- References -- 9 Conclusions and future directions -- 9.1 OTFS key advantages -- 9.2 Pros and cons of OTFS variants -- 9.3 Other research directions -- 9.3.1 Channel estimation and PAPR reduction -- 9.3.2 Channels with fast time-varying delay-Doppler paths -- 9.3.3 Multiuser communications -- 9.3.4 Massive MIMO-OTFS -- 9.3.5 OTFS for RadCom -- 9.3.6 Orthogonal time sequency multiplexing and precoding design -- 9.3.7 Machine learning for OTFS -- References -- A Notation and acronyms -- B Some useful matrix properties -- B.1 The DFT matrix -- B.2 Permutation matrices -- B.3 Circulant matrices -- B.4 Linear and circular convolutions -- B.5 2D transforms, doubly circulant block matrices, and 2D circular convolution -- C Some MATLAB code and examples -- C.1 Transmitter -- C.2 Channel -- C.3 Receiver -- C.4 Generate G matrix and received signal for OTFS variants -- Index -- Back Cover</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Thaj, Tharaj</subfield><subfield code="e">Verfasser</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Viterbo, Emanuele</subfield><subfield code="e">Verfasser</subfield><subfield code="0">(DE-588)1164476459</subfield><subfield code="4">aut</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="a">Hong, Yi</subfield><subfield code="t">Delay-Doppler Communications</subfield><subfield code="d">San Diego : Elsevier Science & Technology,c2022</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="z">978-0-323-85028-5</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-30-PQE</subfield></datafield><datafield tag="966" ind1="e" ind2=" 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| id | DE-604.BV048221853 |
| illustrated | Not Illustrated |
| index_date | 2024-07-03T19:50:32Z |
| indexdate | 2024-07-20T04:02:58Z |
| institution | BVB |
| isbn | 9780323859660 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-033602590 |
| oclc_num | 1299382780 |
| open_access_boolean | |
| owner | DE-91 DE-BY-TUM |
| owner_facet | DE-91 DE-BY-TUM |
| physical | 1 Online-Ressource (xx, 240 Seiten) Illustrationen, Diagramme |
| psigel | ZDB-30-PQE ZDB-30-PQE TUM_PDA_PQE_Kauf |
| publishDate | 2022 |
| publishDateSearch | 2022 |
| publishDateSort | 2022 |
| publisher | Academic Press, an imprint of Elsevier |
| record_format | marc |
| spelling | Hong, Yi Verfasser aut Delay-Doppler communications principles and applications Yi Hong, Tharaj Thaj, Emanuele Viterbo London, United Kingdom ; San Diego, CA, United States ; Cambridge, MA, United States ; Kidlington, Oxford, United Kingdom Academic Press, an imprint of Elsevier [2022] © 2022 1 Online-Ressource (xx, 240 Seiten) Illustrationen, Diagramme txt rdacontent c rdamedia cr rdacarrier Description based on publisher supplied metadata and other sources Front Cover -- Delay-Doppler Communications -- Copyright -- Contents -- List of figures -- Biography -- Yi Hong -- Tharaj Thaj -- Emanuele Viterbo -- Preface -- 1 Introduction -- 1.1 High-mobility wireless channels -- 1.2 Waveforms for high-mobility wireless channels -- 1.3 Bibliographical notes -- References -- 2 High-mobility wireless channels -- 2.1 Input-output model of the wireless channel -- 2.1.1 Geometric model -- 2.1.2 Delay-Doppler representation -- 2.2 Continuous-time baseband channel model -- 2.3 Discrete-time baseband channel model -- 2.4 Relation among different channel representations -- 2.5 Channel models for numerical simulations -- 2.5.1 Standard wireless mobile multipath propagation scenarios -- 2.5.2 Synthetic propagation scenario -- 2.6 Bibliographical notes -- References -- 3 OFDM review and its limitations -- 3.1 Introduction -- 3.2 OFDM system model -- 3.2.1 Generalized multicarrier modulation -- 3.2.2 OFDM transmitter -- 3.3 OFDM frequency domain input-output relation -- 3.4 Advantages and disadvantages of OFDM -- 3.4.1 High PAPR -- 3.4.2 High OOB -- 3.4.3 Sensitivity to CFO -- 3.5 OFDM in high-mobility multipath channels -- 3.6 Bibliographical notes -- References -- 4 Delay-Doppler modulation -- 4.1 System model -- 4.1.1 Parameter choice for OTFS systems -- 4.1.2 OTFS modulation -- 4.1.3 High-mobility channel distortion -- 4.1.4 OTFS demodulation -- 4.2 OTFS input-output relation with ideal waveforms -- 4.2.1 Time-frequency domain analysis -- 4.2.2 Delay-Doppler domain analysis -- 4.3 Matrix formulation for OTFS -- 4.3.1 OTFS modulation -- 4.3.2 OTFS modulation via the IDZT -- 4.3.3 OTFS demodulation -- 4.3.4 OTFS demodulation via the DZT -- 4.4 OTFS input-output relations in vectorized form -- 4.4.1 Time domain input-output relation -- 4.4.2 Time-frequency input-output relation -- 4.4.3 Delay-time input-output relation 4.4.4 Delay-Doppler input-output relation -- 4.5 Variants of OTFS -- 4.5.1 Reduced ZP OTFS -- RZP-OTFS: time domain analysis -- RZP-OTFS: delay-time domain analysis -- RZP-OTFS: delay-Doppler domain analysis -- RZP-OTFS: fractional delay and fractional Doppler shifts -- RZP-OTFS: integer delay and fractional Doppler shifts -- RZP-OTFS: integer delay and integer Doppler shifts -- 4.5.2 Reduced CP-OTFS -- RCP-OTFS: time domain analysis -- RCP-OTFS: delay-time and delay-Doppler domain analysis -- 4.5.3 CP-OTFS -- CP-OTFS: time domain analysis -- CP-OTFS: delay-time domain analysis -- CP-OTFS: delay-Doppler domain analysis -- CP-OTFS: fractional delay and fractional Doppler shifts -- CP-OTFS: integer delay and fractional Doppler shifts -- CP-OTFS: integer delay and integer Doppler shifts -- 4.5.4 ZP-OTFS -- ZP-OTFS: time domain analysis -- ZP-OTFS: delay-time and delay-Doppler domain analysis -- 4.6 Summary of channel representations and input-output relations for OTFS variants -- 4.6.1 Channel representations for OTFS variants -- 4.6.2 Delay-Doppler input-output relations for OTFS variants -- 4.6.3 Comparison of OTFS variants -- 4.7 Bibliographical notes -- References -- 5 Zak transform analysis for delay-Doppler communications -- 5.1 A brief review of the different Fourier transforms -- 5.2 The Zak transform -- 5.2.1 Properties of the Zak transform -- 5.2.2 The inverse Zak transform -- 5.3 The delay-Doppler basis functions -- 5.4 Zak transform in delay-Doppler communications -- 5.4.1 Single path delay-Doppler channel -- 5.4.2 Multipath and general delay-Doppler channel -- 5.4.3 Band- and time-limited delay-Doppler basis functions -- 5.4.3.1 Bandlimited basis functions -- 5.4.3.2 Time limited basis functions -- 5.4.3.3 Band- and time-limited basis functions -- 5.4.4 Communications using band- and time-limited signals -- 5.5 The discrete Zak transform 5.5.1 The inverse discrete Zak transform -- 5.5.2 Properties of the DZT -- 5.6 DZT in delay-Doppler communications -- 5.6.1 Receiver sampling -- 5.6.2 Time-windowing at RX and TX -- 5.6.3 RCP-OTFS with rectangular Tx and Rx window -- 5.6.4 RZP-OTFS with rectangular Tx and Rx window -- 5.7 Bibliographical notes -- References -- 6 Detection methods -- 6.1 Overview of OTFS input-output relation -- 6.2 Single-tap frequency domain equalizer -- 6.2.1 Single-tap equalizer for RCP-OTFS -- 6.2.2 Block-wise single-tap equalizer for CP-OTFS -- 6.2.3 Complexity -- 6.3 Linear minimum mean-square error detection -- 6.3.1 Delay-Doppler domain LMMSE detection -- 6.3.2 Time domain LMMSE detection -- 6.3.3 Complexity -- 6.4 Message passing detection -- 6.4.1 Message passing detection algorithm -- 6.4.2 Complexity -- 6.5 Maximum-ratio combining detection -- 6.5.1 Delay-Doppler domain MRC detection -- 6.5.2 Complexity -- Delay-Doppler implementation complexity -- Initial step complexity -- 6.5.3 Reduced complexity delay-time domain implementation -- 6.5.4 Complexity -- Delay-time implementation complexity -- Initial step complexity -- 6.5.5 Low complexity initial estimate -- Complexity for initial estimate -- 6.5.6 MRC detection for other OTFS variants -- 6.6 Iterative rake turbo decoder -- 6.7 Illustrative results and discussion -- 6.8 Bibliographical notes -- References -- 7 Channel estimation methods -- 7.1 Introduction -- 7.2 Embedded pilot delay-Doppler channel estimation -- 7.2.1 The integer Doppler case -- 7.2.2 The fractional Doppler case -- 7.2.3 Effect of channel estimation on spectral efficiency -- 7.3 Embedded pilot-aided delay-time domain channel estimation -- 7.3.1 Pilot placement -- 7.3.2 Delay-time channel estimation -- 7.3.3 Channel estimation complexity -- 7.3.4 Extension to other OTFS variants 7.4 Real-time OTFS software-defined radio implementation -- 7.4.1 Effect of DC offset on channel estimation -- 7.4.2 Effect of carrier frequency offset on channel estimation -- 7.4.3 Experiment setup, results, and discussion -- 7.5 Bibliographical notes -- References -- 8 MIMO and multiuser OTFS -- 8.1 Introduction -- 8.2 System model for MIMO-OTFS -- 8.2.1 Transmitter and receiver -- 8.2.2 Channel -- 8.2.3 Input-output relation for MIMO-OTFS -- 8.2.3.1 Time domain -- 8.2.3.2 Delay-Doppler domain -- 8.2.3.3 Delay-time domain -- 8.3 Detection methods -- 8.3.1 Linear minimum mean-square error detector -- 8.3.2 Message passing detector -- 8.3.3 Maximum-ratio combining detector -- 8.3.3.1 Delay-Doppler domain MRC detection -- 8.3.3.2 Reduced complexity delay-time domain implementation -- 8.3.3.3 MRC detection complexity -- 8.4 MIMO-OTFS channel estimation -- 8.5 Multiuser OTFS channel estimation -- 8.6 Numerical results and discussion -- 8.7 Bibliographical notes -- References -- 9 Conclusions and future directions -- 9.1 OTFS key advantages -- 9.2 Pros and cons of OTFS variants -- 9.3 Other research directions -- 9.3.1 Channel estimation and PAPR reduction -- 9.3.2 Channels with fast time-varying delay-Doppler paths -- 9.3.3 Multiuser communications -- 9.3.4 Massive MIMO-OTFS -- 9.3.5 OTFS for RadCom -- 9.3.6 Orthogonal time sequency multiplexing and precoding design -- 9.3.7 Machine learning for OTFS -- References -- A Notation and acronyms -- B Some useful matrix properties -- B.1 The DFT matrix -- B.2 Permutation matrices -- B.3 Circulant matrices -- B.4 Linear and circular convolutions -- B.5 2D transforms, doubly circulant block matrices, and 2D circular convolution -- C Some MATLAB code and examples -- C.1 Transmitter -- C.2 Channel -- C.3 Receiver -- C.4 Generate G matrix and received signal for OTFS variants -- Index -- Back Cover Thaj, Tharaj Verfasser aut Viterbo, Emanuele Verfasser (DE-588)1164476459 aut Erscheint auch als Hong, Yi Delay-Doppler Communications San Diego : Elsevier Science & Technology,c2022 Druck-Ausgabe 978-0-323-85028-5 |
| spellingShingle | Hong, Yi Thaj, Tharaj Viterbo, Emanuele Delay-Doppler communications principles and applications Front Cover -- Delay-Doppler Communications -- Copyright -- Contents -- List of figures -- Biography -- Yi Hong -- Tharaj Thaj -- Emanuele Viterbo -- Preface -- 1 Introduction -- 1.1 High-mobility wireless channels -- 1.2 Waveforms for high-mobility wireless channels -- 1.3 Bibliographical notes -- References -- 2 High-mobility wireless channels -- 2.1 Input-output model of the wireless channel -- 2.1.1 Geometric model -- 2.1.2 Delay-Doppler representation -- 2.2 Continuous-time baseband channel model -- 2.3 Discrete-time baseband channel model -- 2.4 Relation among different channel representations -- 2.5 Channel models for numerical simulations -- 2.5.1 Standard wireless mobile multipath propagation scenarios -- 2.5.2 Synthetic propagation scenario -- 2.6 Bibliographical notes -- References -- 3 OFDM review and its limitations -- 3.1 Introduction -- 3.2 OFDM system model -- 3.2.1 Generalized multicarrier modulation -- 3.2.2 OFDM transmitter -- 3.3 OFDM frequency domain input-output relation -- 3.4 Advantages and disadvantages of OFDM -- 3.4.1 High PAPR -- 3.4.2 High OOB -- 3.4.3 Sensitivity to CFO -- 3.5 OFDM in high-mobility multipath channels -- 3.6 Bibliographical notes -- References -- 4 Delay-Doppler modulation -- 4.1 System model -- 4.1.1 Parameter choice for OTFS systems -- 4.1.2 OTFS modulation -- 4.1.3 High-mobility channel distortion -- 4.1.4 OTFS demodulation -- 4.2 OTFS input-output relation with ideal waveforms -- 4.2.1 Time-frequency domain analysis -- 4.2.2 Delay-Doppler domain analysis -- 4.3 Matrix formulation for OTFS -- 4.3.1 OTFS modulation -- 4.3.2 OTFS modulation via the IDZT -- 4.3.3 OTFS demodulation -- 4.3.4 OTFS demodulation via the DZT -- 4.4 OTFS input-output relations in vectorized form -- 4.4.1 Time domain input-output relation -- 4.4.2 Time-frequency input-output relation -- 4.4.3 Delay-time input-output relation 4.4.4 Delay-Doppler input-output relation -- 4.5 Variants of OTFS -- 4.5.1 Reduced ZP OTFS -- RZP-OTFS: time domain analysis -- RZP-OTFS: delay-time domain analysis -- RZP-OTFS: delay-Doppler domain analysis -- RZP-OTFS: fractional delay and fractional Doppler shifts -- RZP-OTFS: integer delay and fractional Doppler shifts -- RZP-OTFS: integer delay and integer Doppler shifts -- 4.5.2 Reduced CP-OTFS -- RCP-OTFS: time domain analysis -- RCP-OTFS: delay-time and delay-Doppler domain analysis -- 4.5.3 CP-OTFS -- CP-OTFS: time domain analysis -- CP-OTFS: delay-time domain analysis -- CP-OTFS: delay-Doppler domain analysis -- CP-OTFS: fractional delay and fractional Doppler shifts -- CP-OTFS: integer delay and fractional Doppler shifts -- CP-OTFS: integer delay and integer Doppler shifts -- 4.5.4 ZP-OTFS -- ZP-OTFS: time domain analysis -- ZP-OTFS: delay-time and delay-Doppler domain analysis -- 4.6 Summary of channel representations and input-output relations for OTFS variants -- 4.6.1 Channel representations for OTFS variants -- 4.6.2 Delay-Doppler input-output relations for OTFS variants -- 4.6.3 Comparison of OTFS variants -- 4.7 Bibliographical notes -- References -- 5 Zak transform analysis for delay-Doppler communications -- 5.1 A brief review of the different Fourier transforms -- 5.2 The Zak transform -- 5.2.1 Properties of the Zak transform -- 5.2.2 The inverse Zak transform -- 5.3 The delay-Doppler basis functions -- 5.4 Zak transform in delay-Doppler communications -- 5.4.1 Single path delay-Doppler channel -- 5.4.2 Multipath and general delay-Doppler channel -- 5.4.3 Band- and time-limited delay-Doppler basis functions -- 5.4.3.1 Bandlimited basis functions -- 5.4.3.2 Time limited basis functions -- 5.4.3.3 Band- and time-limited basis functions -- 5.4.4 Communications using band- and time-limited signals -- 5.5 The discrete Zak transform 5.5.1 The inverse discrete Zak transform -- 5.5.2 Properties of the DZT -- 5.6 DZT in delay-Doppler communications -- 5.6.1 Receiver sampling -- 5.6.2 Time-windowing at RX and TX -- 5.6.3 RCP-OTFS with rectangular Tx and Rx window -- 5.6.4 RZP-OTFS with rectangular Tx and Rx window -- 5.7 Bibliographical notes -- References -- 6 Detection methods -- 6.1 Overview of OTFS input-output relation -- 6.2 Single-tap frequency domain equalizer -- 6.2.1 Single-tap equalizer for RCP-OTFS -- 6.2.2 Block-wise single-tap equalizer for CP-OTFS -- 6.2.3 Complexity -- 6.3 Linear minimum mean-square error detection -- 6.3.1 Delay-Doppler domain LMMSE detection -- 6.3.2 Time domain LMMSE detection -- 6.3.3 Complexity -- 6.4 Message passing detection -- 6.4.1 Message passing detection algorithm -- 6.4.2 Complexity -- 6.5 Maximum-ratio combining detection -- 6.5.1 Delay-Doppler domain MRC detection -- 6.5.2 Complexity -- Delay-Doppler implementation complexity -- Initial step complexity -- 6.5.3 Reduced complexity delay-time domain implementation -- 6.5.4 Complexity -- Delay-time implementation complexity -- Initial step complexity -- 6.5.5 Low complexity initial estimate -- Complexity for initial estimate -- 6.5.6 MRC detection for other OTFS variants -- 6.6 Iterative rake turbo decoder -- 6.7 Illustrative results and discussion -- 6.8 Bibliographical notes -- References -- 7 Channel estimation methods -- 7.1 Introduction -- 7.2 Embedded pilot delay-Doppler channel estimation -- 7.2.1 The integer Doppler case -- 7.2.2 The fractional Doppler case -- 7.2.3 Effect of channel estimation on spectral efficiency -- 7.3 Embedded pilot-aided delay-time domain channel estimation -- 7.3.1 Pilot placement -- 7.3.2 Delay-time channel estimation -- 7.3.3 Channel estimation complexity -- 7.3.4 Extension to other OTFS variants 7.4 Real-time OTFS software-defined radio implementation -- 7.4.1 Effect of DC offset on channel estimation -- 7.4.2 Effect of carrier frequency offset on channel estimation -- 7.4.3 Experiment setup, results, and discussion -- 7.5 Bibliographical notes -- References -- 8 MIMO and multiuser OTFS -- 8.1 Introduction -- 8.2 System model for MIMO-OTFS -- 8.2.1 Transmitter and receiver -- 8.2.2 Channel -- 8.2.3 Input-output relation for MIMO-OTFS -- 8.2.3.1 Time domain -- 8.2.3.2 Delay-Doppler domain -- 8.2.3.3 Delay-time domain -- 8.3 Detection methods -- 8.3.1 Linear minimum mean-square error detector -- 8.3.2 Message passing detector -- 8.3.3 Maximum-ratio combining detector -- 8.3.3.1 Delay-Doppler domain MRC detection -- 8.3.3.2 Reduced complexity delay-time domain implementation -- 8.3.3.3 MRC detection complexity -- 8.4 MIMO-OTFS channel estimation -- 8.5 Multiuser OTFS channel estimation -- 8.6 Numerical results and discussion -- 8.7 Bibliographical notes -- References -- 9 Conclusions and future directions -- 9.1 OTFS key advantages -- 9.2 Pros and cons of OTFS variants -- 9.3 Other research directions -- 9.3.1 Channel estimation and PAPR reduction -- 9.3.2 Channels with fast time-varying delay-Doppler paths -- 9.3.3 Multiuser communications -- 9.3.4 Massive MIMO-OTFS -- 9.3.5 OTFS for RadCom -- 9.3.6 Orthogonal time sequency multiplexing and precoding design -- 9.3.7 Machine learning for OTFS -- References -- A Notation and acronyms -- B Some useful matrix properties -- B.1 The DFT matrix -- B.2 Permutation matrices -- B.3 Circulant matrices -- B.4 Linear and circular convolutions -- B.5 2D transforms, doubly circulant block matrices, and 2D circular convolution -- C Some MATLAB code and examples -- C.1 Transmitter -- C.2 Channel -- C.3 Receiver -- C.4 Generate G matrix and received signal for OTFS variants -- Index -- Back Cover |
| title | Delay-Doppler communications principles and applications |
| title_auth | Delay-Doppler communications principles and applications |
| title_exact_search | Delay-Doppler communications principles and applications |
| title_exact_search_txtP | Delay-Doppler communications principles and applications |
| title_full | Delay-Doppler communications principles and applications Yi Hong, Tharaj Thaj, Emanuele Viterbo |
| title_fullStr | Delay-Doppler communications principles and applications Yi Hong, Tharaj Thaj, Emanuele Viterbo |
| title_full_unstemmed | Delay-Doppler communications principles and applications Yi Hong, Tharaj Thaj, Emanuele Viterbo |
| title_short | Delay-Doppler communications |
| title_sort | delay doppler communications principles and applications |
| title_sub | principles and applications |
| work_keys_str_mv | AT hongyi delaydopplercommunicationsprinciplesandapplications AT thajtharaj delaydopplercommunicationsprinciplesandapplications AT viterboemanuele delaydopplercommunicationsprinciplesandapplications |