| 基于预编码系统的LDPC-SSD性能研究 |
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| 引用本文： | 胡锦涛,王永生,许家栋,王顶.基于预编码系统的LDPC-SSD性能研究[J].计算机工程,2011,37(3):105-107. |
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| 作者姓名： | 胡锦涛 王永生 许家栋 王顶 |
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| 作者单位： | 西北工业大学电子信息学院,西安,710129 |
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| 基金项目： | 航天支撑技术基金，西北工业大学科技创新基金 |
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| 摘 要： | 为有效提高通信系统在无线衰落信道中的性能，提出一种基于预编码的低密度奇偶校验码编码的信号空间分集(LDPC-SSD)系统。将信号空间分集旋转矩阵看作一个码率为1的编码器。在信号空间分集矩阵前加入一个预编码器。给出预编码器的3个设计准则。在无线衰落信道下，仿真基于预编码的LDPC-SSD系统。仿真结果表明，该方案比没有预编码的LDPC-SSD系统在衰落信道下具有更好的性能。
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| 关 键 词： | 信号空间分集 准循环低密度奇偶校验码 旋转矩阵 分集阶数 预编码 |
Study of LDPC-SSD Performance Based on Precoding System |
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| HU Jin-tao,WANG Yong-sheng,XU Jia-dong,WANG Ding.Study of LDPC-SSD Performance Based on Precoding System[J].Computer Engineering,2011,37(3):105-107. |
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| Authors: | HU Jin-tao WANG Yong-sheng XU Jia-dong WANG Ding |
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| Affiliation: | (School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710129,China) |
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| Abstract: | In order to improve communication system performance in wireless fading channel, this paper proposes LDPC coded Signal Space Diversity（LDPC-SSD） with precoding system. The signal space diversity rotation matrix is considered as an encoder with code rate equal to 1. In this system, a precoder is added before the signal space diversity matrix. At the same time, three pre-encoder design criteria are given. The pre-encoded LDPC-SSD system is simulated in wireless fading channel. Simulation results show that the proposed scheme has better performance than those without pre-encoded LDPC-SSD system in wireless fading channel. |
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| Keywords: | Signal Space Diversity（SSD） quasi-cyclic LDPC codes rotation matrix diversity order precoding |
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