On Symbol Mapping for Binary Physical-Layer Network Coding with PSK Modulation

被引：45

作者：

Noori, Moslem ^{[1
]}

Ardakani, Masoud ^{[1
]}

机构：

[1] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2M7, Canada

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2012年 / 11卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Physical-layer network coding; PSK modulation; symbol mapping; minimum Euclidean distance; CHANNEL; BIT;

D O I：

10.1109/TWC.2011.110811.110347

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In a system employing physical-layer network coding, the superimposed constellation at the relay may have ambiguity where one received signal is associated with more than one possible combination of users' data. We find the necessary and sufficient condition on a user bit mapping which removes this ambiguity for phase shift keying modulation. Further, we introduce the concept of semi-Gray mapping which improves the system BER performance and achievable rate. The necessary and sufficient condition of having a semi-Gray mapping is also found. Interestingly, the widely used binary reflected Gray mapping does not satisfy the semi-Gray mapping condition resulting in a poorer performance compared to our proposed semi-Gray scheme.

引用

页码：21 / 26

页数：6

共 12 条

[1] On the optimality of the binary reflected gray code [J].