| 协作分集OFDM系统的混合排序子载波配对算法 |
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| 引用本文： | 沈振惠,王晓湘,张建华.协作分集OFDM系统的混合排序子载波配对算法[J].高技术通讯,2009,19(10). |
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| 作者姓名： | 沈振惠 王晓湘 张建华 |
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| 作者单位： | 1. 北京邮电大学泛网无线通信教育部重点实验室,北京,100876
2. 中船工业集团船舶系统工程部,北京,100036 |
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| 摘 要： | 考虑到信源子载波和中继子载波的配对能在频率选择信道环境下提高协作分集系统的性能,对协作分集正交频分复用(OFDM)系统的子载波配对进行了研究,推导了2种特殊情况下的最佳子载波配对方法,即顺序配对和逆序配对,在此基础上,提出了一种基于混合排序的子载波配对算法.该算法根据信源-中继链路、信源-目标链路和中继-目标链路上的每个子载波的信噪比状态,自适应地选择顺序配对或逆序配对.仿真结果表明,提出的混合排序子载波配对算法能显著提高系统的平均可取得速率,性能明显优于顺序配对和逆序配对.
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| 关 键 词： | 协作分集 子载波配对 混合排序配对 平均可取得速率 |
A hybrid sorted algorithm for subcarrier pairing in cooperative diversity OFDM systems |
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| Shen Zhenhui,Wang Xiaoxiang,Zhang Jianhua.A hybrid sorted algorithm for subcarrier pairing in cooperative diversity OFDM systems[J].High Technology Letters,2009,19(10). |
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| Authors: | Shen Zhenhui Wang Xiaoxiang Zhang Jianhua |
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| Affiliation: | Shen Zhenhui,Wang Xiaoxiang,Zhang Jianhua~*(Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876)( * System Engineering Research Institute of CSSC,Beijing 100036) |
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| Abstract: | In consideration of the fact that the performance of a cooperative diversity system can be improved by pairing source subcarriers with relay subcarriers,this paper investigates the subcarrier pairing problem in OFDM-based cooperative di- versity systems.Two optimal subcarrier pairing methods are derived under two extreme conditions,respectively,i.e.the order pairing and the reverse order pairing.Further,a hybrid sorted pairing algorithm is proposed,which adaptively se- lects the order pairing or the reverse... |
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| Keywords: | cooperative diversity subcarrier pairing hybrid sorted pairing average achievable rate |
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