Full Diversity Physical-Layer Network Coding in Two-Way Relay Channels With Multiple Antennas

This paper studies a two-way relay channel where two single-antenna users exchange messages via a relay with K antennas. A new physical-layer network coding (PNC) method is proposed, referred to as channel-quantized PNC (CQ-PNC), that can achieve full diversity gain of K. The proposed method convert...

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Vydané v:	IEEE transactions on wireless communications Ročník 13; číslo 8; s. 4273 - 4282
Hlavní autori:	Shengli Zhang, Zhou, Qing F., Caihong Kai, Wei Zhang
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	New York, NY IEEE 01.08.2014 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:	Antennas Applied sciences Channels Coding Complexity theory Exact sciences and technology Gain Interference Messages MIMO Network coding Networks Quantization (signal) Radiocommunications Relay Relays Switching and signalling Synchronism Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory two-way relay channel (TWRC) physical-layer network coding (PNC) multiple-input multiple-output (MIMO) Full diversity Performance evaluation MIMO system Packet switching Relay Quantization error Two channel system Synchronization Computational complexity Relay channel Simulation Quantized signal QR factorization Network coding Signal conversion Multiple channel Antenna array Antenna
ISSN:	1536-1276, 1558-2248
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Shrnutí:	This paper studies a two-way relay channel where two single-antenna users exchange messages via a relay with K antennas. A new physical-layer network coding (PNC) method is proposed, referred to as channel-quantized PNC (CQ-PNC), that can achieve full diversity gain of K. The proposed method converts K received signals at the relay into two signals by a QR decomposition. The first one is a weighted summation of the two users' messages and the second one is a scaled version of one user's message. Then, the first signal is quantized at the relay by using the channel coefficient and the quantization error is cancelled by using the side information of the second signal. Finally, a Gaussian-integer weighted summation of the two users' messages is obtained, mapped to network codeword, and then broadcast to the two users. It is proved that the proposed CQ-PNC can achieve the full diversity gain of K with receiver side channel information, low computational complexity and symbol level synchronization. Simulation results demonstrate that the proposed method obtains optimum performance results with negligible gap.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1536-1276 1558-2248
DOI:	10.1109/TWC.2014.2314122