Channel Quantization for Physical Layer Network-Coded Two-Way Relaying

被引:0
作者
Muralidharan, Vijayvaradharaj T. [1 ]
Namboodiri, Vishnu [1 ]
Rajan, B. Sundar [1 ]
机构
[1] IISc, Dept ECE, Bangalore 560012, Karnataka, India
来源
2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2012年
关键词
D O I
暂无
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
The design of modulation schemes for the physical layer network-coded two way relaying scenario is considered with the protocol which employs two phases: Multiple access (MA) Phase and Broadcast (BC) phase. It was observed by Koike-Akino et al. that adaptively changing the network coding map used at the relay according to the channel conditions greatly reduces the impact of multiple access interference which occurs at the relay during the MA phase. In other words, the set of all possible channel realizations (the complex plane) is quantized into a finite number of regions, with a specific network coding map giving the best performance in a particular region. We highlight the issues associated with the scheme proposed by Koike-Akino et al. and propose a scheme which solves these issues. We obtain a quantization of the set of all possible channel realizations analytically for the case when M-PSK (for M any power of 2) is the signal set used during the MA phase. It is shown that the complex plane can be classified into two regions: a region in which any network coding map which satisfies the so called exclusive law gives the same best performance and a region in which the choice of the network coding map affects the performance, which is further quantized based on the choice of the network coding map which optimizes the performance. The quantization thus obtained analytically, leads to the same as the one obtained using computer search for 4-PSK signal set by Koike-Akino et al., when specialized for M=4.
引用
收藏
页码:1654 / 1659
页数:6
相关论文
共 8 条
[1]  
Hern B., 2011, IEEE ISIT
[2]   Performance Bounds for Bidirectional Coded Cooperation Protocols [J].
Kim, Sang Joon ;
Mitran, Patrick ;
Tarokh, Vahid .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2008, 54 (11) :5235-5241
[3]  
Koike-Akino T., 2009, IEEE ICC 2009 DRESD
[4]   Optimized Constellations for Two-Way Wireless Relaying with Physical Network Coding [J].
Koike-Akino, Toshiaki ;
Popovski, Petar ;
Tarokh, Vahid .
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2009, 27 (05) :773-787
[5]  
Murahdharan Vijayvaradharaj T, 2011, CHANNEL QUANTIZATION
[6]  
Namboodiri Vishnu, 2011, WIRELESS BIDIRECTION
[7]  
Popovski P., 2007, IEEE ICC
[8]   Hot Topic: Physical-Layer Network Coding [J].
Zhang, Shengli ;
Liew, Soung Chang ;
Lam, Patrick P. .
MOBICOM 2006, 2006, :358-365