| 信号空间分集中向量高斯近似算法的改进 |
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| 引用本文： | 冯文江,王茹茹,陈栋才,刘震.信号空间分集中向量高斯近似算法的改进[J].数据采集与处理,2011,26(4). |
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| 作者姓名： | 冯文江 王茹茹 陈栋才 刘震 |
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| 作者单位： | 重庆大学通信工程学院,重庆,400044 |
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| 基金项目： | 国家自然科学基金(60872038)资助项目; 重庆市自然科学基金重点(CSTC2009BA2064)资助项目; 国家“211工程”三期建设(S-09102)资助项目 |
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| 摘 要： | 针对采用了信号空间分集的通信接收机检测算法的性能提升,以向量高斯近似检测算法为基础,通过改进原算法中每个符号的概率期望和方差的计算方法,给定符号的软干扰消除计算的信息依赖关系以及概率密度函数的计算,以降低算法的复杂度,提升系统的抗衰落能力。对改进算法进行了仿真比较和性能分析。结果表明,在瑞利衰落信道中,当旋转矩阵维数N=16,迭代次数为6时的误比特率曲线与理想边界接近,在误比特率BER=10-5时,仅相差0.2 dB;在时延要求较高的通信系统应用中,迭代4次即可满足要求,且继续增加迭代次数已没有误比特率下降裕量。
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| 关 键 词： | 信号空间分集 格栅 向量高斯近似 |
Improvement and Analysis of Vector Gaussian Approximation in Signal Space Diversity |
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| Feng Wenjiang,Wang Ruru,Chen Dongcai,Liu Zheng.Improvement and Analysis of Vector Gaussian Approximation in Signal Space Diversity[J].Journal of Data Acquisition & Processing,2011,26(4). |
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| Authors: | Feng Wenjiang Wang Ruru Chen Dongcai Liu Zheng |
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| Affiliation: | Feng Wenjiang,Wang Ruru,Chen Dongcai,Liu Zheng(College of Communication Engineering,Chongqing University,Chongqing,400044,China) |
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| Abstract: | Focused on the performance improvement of receiver detection algorithm using signal space diversity,three aspects in the original algorithm are modified based on vector Gaussian approximation algorithm,including the calculation methods of probability expectation and variance with regarding to each symbol,the information dependence relationship in soft interference cancellation of the given symbol,and calculation of the probability density function.Therefore,the complexity of the algorithm is reduced and the... |
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| Keywords: | signal space diversity lattice vector Gaussian approximation |
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