Differential Modulation for Bidirectional Relaying With Analog Network Coding

被引：78

作者：

Song, Lingyang ^{[1
]}

Li, Yonghui ^{[2
]}

Huang, Anpeng ^{[1
]}

Jiao, Bingli ^{[1
]}

Vasilakos, Athanasios V. ^{[3
]}

机构：

[1] Peking Univ, Sch Elect & Comp Sci, Beijing 100871, Peoples R China

[2] Univ Sydney, Sydney, NSW 2006, Australia

[3] Univ Western Macedonia, Dept Comp & Telecommun Engn, GR-50100 Kozani, Greece

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 2010年 / 58卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Amplify-and-forward protocol; analog network coding; bidirectional relaying; differential modulation; FADING CHANNELS; PERFORMANCE;

D O I：

10.1109/TSP.2010.2046441

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 this correspondence, we propose an analog network coding scheme with differential modulation (ANC-DM) using amplify-and-forward protocol for bidirectional relay networks when neither the source nodes nor the relay knows the channel state information (CSI). The performance of the proposed ANC-DM scheme is analyzed and a simple asymptotic bit error rate (BER) expression is derived. The analytical results are verified through simulations. It is shown that the BER performance of the proposed differential scheme is about 3 dB away from that of the coherent detection scheme. To improve the system performance, the optimum power allocation between the sources and the relay is determined based on the simplified BER. Simulation results indicate that the proposed differential scheme with optimum power allocation yields 1-2 dB performance improvement over an equal power allocation scheme.

引用

页码：3933 / 3938

页数：6

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