Modified Orthogonal Space-Time Block Codes for Time-Selective Fading Channels

We consider orthogonal space-time block codes (O-STBCs) in time-selective fading channels and propose a modified O-STBC (MO-STBC), which is less subject to the performance degradation caused by symbol-by-symbol channel variation. It is shown both analytically and through computer simulations that MO...

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Vydané v:	IEEE transactions on vehicular technology Ročník 57; číslo 6; s. 3921 - 3927
Hlavní autori:	Villardi, Gabriel Porto, De Abreu, Giuseppe T. F., Kohno, Ryuji
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	New York, NY IEEE 01.11.2008 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:	Antennas Applied sciences Bit error rate Block codes Channels Coding, codes Computer simulation Decoding Degradation Exact sciences and technology Fading Information, signal and communications theory Mathematical analysis Modulation Modulation, demodulation Molybdenum Orthogonal space-time block codes (O-STBCs) Phase modulation Phase shift keying Quadrature amplitude modulation Radiocommunications self-interference Signal and communications theory Statistical analysis Statistics Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory time-selective fading channels Transmission and modulation (techniques and equipments) transmit diversity Orthogonal space-time block codes time-selective fading channels transmit diversity self-interference Fading channels Performance evaluation Block code Space-time codes Gray code Quadrature amplitude modulation Computer simulation Bit error rate Amplitude modulation Decoding circuit Decoding Orthogonality Degradation Phase shift keying Selective fading M ary modulation Algorithm complexity Orthogonal space-time block codes (O-STBCs) self- interference Antenna Damaging
ISSN:	0018-9545, 1939-9359
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Shrnutí:	We consider orthogonal space-time block codes (O-STBCs) in time-selective fading channels and propose a modified O-STBC (MO-STBC), which is less subject to the performance degradation caused by symbol-by-symbol channel variation. It is shown both analytically and through computer simulations that MO-STBCs effectively reduce the loss of orthogonality affecting O-STBCs in the symbol-by-symbol time-selective channel. MO-STBCs are systematically constructible for any number of antennas and have the same decoding complexity of conventional O-STBCs. The bit-error-rate (BER) performance of MO-STBCs over time-selective fading channels of generalized statistics, with Gray-code-mapped M-ary phase-shift-keying (PSK) modulation and quadratic-amplitude modulation (QAM), is analytically derived. Moreover, MO-STBCs can also easily be combined with existing linear O-STBC decoders specifically designed for the time-selective channel, yielding significant performance improvement over conventionally constructed and decoded O-STBCs.
Bibliografia:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23
ISSN:	0018-9545 1939-9359
DOI:	10.1109/TVT.2008.918697