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Cooperative diversity based on rotation code 被引量:1

Cooperative diversity based on rotation code
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摘要 In order to obtain coding gain along with diversity gain,rotation code was applied to cooperative diversity employing decoded-and-forward cooperative protocol.Different from the same two symbols transmitted in conventional repetition-coded scheme,two different symbols were transmitted separately in two successive timeslots in the proposed rotation-coded cooperative diversity.In this way,constellation spread in the available two-dimensional signal space rather than on a single-dimensional line in repetition-coded scheme,which was supposed to be responsible for the additional coding gain.Under the proposed cooperative transmission model,upper bounds for the symbol-error-rate(SER)of cooperative diversity based on repetition code and rotation code were derived respectively.Both analytical and simulated results show that cooperative diversity based on rotation code can obtain an improved coding gain(by about 2 dB)than repetition-coded scheme without the expense of power or bandwidth. In order to obtain coding gain along with diversity gain, rotation code was applied to cooperative diversity employing decoded-and-forward cooperative protocol. Different from the same two symbols transmitted in conventional repetition-coded scheme, two different symbols were transmitted separately in two successive timeslots in the proposed rotation-coded cooperative diversity. In this way, constellation spread in the available two-dimensional signal space rather than on a single-dimensional line in repetition-coded scheme, which was supposed to be responsible for the additional coding gain. Under the proposed cooperative transmission model, upper bounds for the symbol-error-rate (SER) of cooperative diversity based on repetition code and rotation code were derived respectively. Both analytical and simulated results show that cooperative diversity based on rotation code can obtain an improved coding gain (by about 2 dB) than repetition-coded scheme without the expense of power or bandwidth.
出处 《Journal of Central South University》 SCIE EI CAS 2009年第2期280-284,共5页 中南大学学报(英文版)
基金 Project(2006AA01Z270)supported by the National High Technology Research and Development Program of China Project(U0635003)supported by the National Natural Science Foundation of Guangdong Province,China Project(2007F07)supported by the National Science Foundation of Shaanxi Province,China
关键词 cooperative diversity repetition code rotation code coding gain symbol-error-rate 合作协议 多样性 代码 基础 编码增益 编码方案 分集增益 旋转编码
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参考文献11

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