Fault tolerance aspects of virtual massive MIMO systems:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Passau
2016
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| Schlagworte: | |
| Online-Zugang: | Volltext https://nbn-resolving.org/urn:nbn:de:bvb:739-opus4-4047 Inhaltsverzeichnis |
| Beschreibung: | xiii, 182 Seiten Diagramme |
Internformat
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Datensatz im Suchindex
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|---|---|
| adam_text | Contents
Abstract ii
Acknowledgements iv
Contents v
List of Figures ix
List of Tables xiii
1 Introduction 1
1.1 Motivation ....................................................... 1
1.2 Literature review................................................. 2
1.3 Contributions..................................................... 5
1.4 Outline .......................................................... 7
2 Background 9
2.1 Wireless communication............................................ 9
2.1.1 Multipath channels.......................................... 9
2.1.1.1 Delay spread...................................... 12
2.1.1.2 Coherence bandwidth.................................13
2.1.1.3 Doppler power spectrum .................. 15
2.1.1.4 Coherence time.................................... 16
2.1.1.5 Frequency selective channel model................. 17
2.1.2 Orthogonal frequency division multiplexing ............... 19
2.1.2.1 Cyclic prefix OFDM..................................20
2.1.2.1.1 Encoder / decoder......................... 20
2.1.2.1.2 Modulation / demodulation...................21
2.1.2.1.3 Cyclic prefix .......................... 22
2.1.2.2 Unique word OFDM.................................. 26
2.1.2.2.1 Systematic generation of UW.................27
2.1.2.2.2 Non-systematic generation of UW.............29
2.2 MIMO..............................................................31
2.2.1 Channel model...............................................33
2.2.2 MIMO cyclic prefix OFDM.....................................35
2.2.3 Detection...................................................39
2.2.3.1 LMMSE ..............................................39
v
Contents
vi
2.2.3.1.1 Soft output generation .......................41
2.2.3.1.2 Cyclic prefix.................................43
2.2.3.2 Maximum likelihood.....................................43
2.2.3.2.1 Sphere decoding...............................44
2.2.3.2.1.1 Soft output generation..................47
2.2.3.2.2 Likelihood ascent search......................49
2.3 Fault tolerance.......................................................50
2.3.1 Faults and errors..............................................51
2.3.2 Redundancy................................................... 54
2.3.3 Stochastic computation....................................... 57
2.3.4 Unified channel and memory error model.........................60
2.3.5 Fault-based attacks and countermeasures........................63
3 Detection of virtual massive MIMO systems 65
3.1 MIMO unique word OFDM.................................................66
3.1.1 LMMSE detection................................................70
3.1.1.1 Complexity-reduced LMMSE for systematic MIMO UW-
OFDM..................................................70
3.1.2 Sphere decoding for MIMO UW-OFDM...............................72
3.1.3 LAS for MIMO UW-OFDM...........................................72
3.1.3.1 Maximum a posteriori probability LAS...................73
3.1.3.1.1 Soft output generation .......................76
3.1.3.2 LAS performance improvement using .....................77
3.1.4 Performance comparison.........................................78
3.1.4.1 Simulation parameters..................................78
3.1.4.2 Simulation results.....................................78
3.1.4.3 Complexity comparison................................ 82
3.2 Memory error resilient detection .....................................83
3.2.1 NMMSE-based single error correction.......................... 88
3.2.1.1 log-NMMSE..............................................91
3.2.2 Iterative NMMSE-based multiple error correction................93
3.2.3 Resilient likelihood ascent search........................... 95
3.2.4 Simulation results ............................................99
3.3 Summary............................................................ 101
4 Reliability analysis of QR decomposition 109
4.1 Givens rotations ....................................................110
4.1.1 Systolic array................................................112
4.2 MMSE sorted Givens rotations.........................................115
4.2.1 Hardware implementation.......................................117
4.2.1.1 Real-time requirements................................118
4.2.1.2 Architecture..........................................119
4.2.1.3 Synthesis results.....................................123
4.3 Reliability analysis of combinational components.....................125
4.3.1 Simulation chain..............................................126
4.3.2 Fault injection...............................................127
4.3.3 Simulation results ...........................................127
Contents vii
4.4 Summary............................................................133
5 Evaluation of robust codes 135
5.1 Robust codes.......................................................135
5.1.1 Quadratic sum code......................................... 137
5.1.2 Punctured cubic code.........................................137
5.2 Evaluation methodology........................................... 138
5.2.1 Fault-based metrics ....................................... 138
5.2.2 Fault injection platform.....................................141
5.3 Cross-level protection .......................................... 142
5.3.1 Implementation of code-based protection .....................143
5.3.2 Selective hardening of individual gates .....................144
5.3.3 Synthesis and evaluation of circuit with hardened gates......145
5.3.4 Experimental results....................................... 145
5.3.4.1 Evaluation of hardening for single faults............147
5.3.4.2 Multiple faults......................................150
5.4 Application to cryptographic circuits..............................153
5.4.1 Results .....................................................153
5.5 Summary............................................................157
6 Conclusion 159
A Convolutional codes 161
Bibliography
169
|
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| discipline | Elektrotechnik / Elektronik / Nachrichtentechnik |
| format | Thesis Book |
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| spelling | Tomashevich, Victor Verfasser aut Fault tolerance aspects of virtual massive MIMO systems Victor Tomashevich Passau 2016 xiii, 182 Seiten Diagramme txt rdacontent n rdamedia nc rdacarrier Dissertation Universität Passau 2016 Fehlertoleranz (DE-588)4123192-2 gnd rswk-swf MIMO (DE-588)7540075-3 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content MIMO (DE-588)7540075-3 s Fehlertoleranz (DE-588)4123192-2 s DE-604 Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:739-opus4-4047 https://opus4.kobv.de/opus4-uni-passau/frontdoor/index/index/docId/404 kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:739-opus4-4047 Resolving-System Digitalisierung UB Passau - ADAM Catalogue Enrichment application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=029202746&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Tomashevich, Victor Fault tolerance aspects of virtual massive MIMO systems Fehlertoleranz (DE-588)4123192-2 gnd MIMO (DE-588)7540075-3 gnd |
| subject_GND | (DE-588)4123192-2 (DE-588)7540075-3 (DE-588)4113937-9 |
| title | Fault tolerance aspects of virtual massive MIMO systems |
| title_auth | Fault tolerance aspects of virtual massive MIMO systems |
| title_exact_search | Fault tolerance aspects of virtual massive MIMO systems |
| title_full | Fault tolerance aspects of virtual massive MIMO systems Victor Tomashevich |
| title_fullStr | Fault tolerance aspects of virtual massive MIMO systems Victor Tomashevich |
| title_full_unstemmed | Fault tolerance aspects of virtual massive MIMO systems Victor Tomashevich |
| title_short | Fault tolerance aspects of virtual massive MIMO systems |
| title_sort | fault tolerance aspects of virtual massive mimo systems |
| topic | Fehlertoleranz (DE-588)4123192-2 gnd MIMO (DE-588)7540075-3 gnd |
| topic_facet | Fehlertoleranz MIMO Hochschulschrift |
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