Non-memoryless Analog Network Coding in Two-Way Relay Channel
Refereed conference paper presented and published in conference proceedings

香港中文大學研究人員

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摘要Physical-layer Network Coding (PNC) can significantly improve the throughput of two-way relay channels. An interesting variant of PNC is Analog Network Coding (ANC). Almost all ANC schemes proposed to date, however, operate in a symbol by symbol manner (memoryless) and cannot exploit the redundant information in channel-coded packets to enhance performance. This paper proposes a non-memoryless ANC scheme. In particular, we design a soft-input soft-output decoder for the relay node to process the superimposed packets from the two end nodes to yield an estimated MMSE packet for forwarding back to the end nodes. Our decoder takes into account the correlation among different symbols in the packets due to channel coding, and provides significantly improved MSE performance. Our analysis shows that the SNR improvement at the relay node is lower bounded by 1/R (R is the code rate) with the simplest LDPC code (repeat code). The SNR improvement is also verified by numerical simulation with LDPC code. Our results indicate that LDPC codes of different degrees are preferred in different SNR regions. Generally speaking, smaller degrees are preferred for lower SNRs.
著者Zhang SL, Liew SC, Zhou QF, Lu L, Wang H
會議名稱IEEE International Conference on Communications (ICC)
會議開始日05.06.2011
會議完結日09.06.2011
會議地點Kyoto
會議國家/地區日本
詳細描述organized by IEEE COMSOC,
出版年份2011
月份1
日期1
出版社IEEE
電子國際標準書號978-1-61284-233-2
國際標準期刊號1550-3607
語言英式英語
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; Telecommunications

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