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论文:2014,Vol:32,Issue(3):373-377 |
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引用本文： |
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包涛, 梁永玲. 衰落信道下空时编码级联RS码的性能分析与研究[J]. 西北工业大学 |
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Bao Tao, Liang Yongling. An Improved Algorithm of Space-Time-Frequency (STF) Codes Based on a MIMO-OFDM System[J]. Northwestern polytechnical university |
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| 衰落信道下空时编码级联RS码的性能分析与研究 |
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| 包涛1, 梁永玲2 |
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1. 西北工业大学 电子信息学院, 陕西 西安 710129;
2. 中国刑事警察学院刑侦系, 辽宁 沈阳 110035 |
| 摘要: |
| MIMO系统虽可有效提高数据传输速率,但在极其复杂的无线信道环境下,信号除受多径衰落和随机噪声的影响,还伴有突发性差错。考虑到将MIMO系统中的空时编码技术与信道编码技术两者相结合可解决高速数据传输和可靠数据传输之间的矛盾。提出了将一个满秩的空时编码模块与外码RS码级联的编码结构,并通过公式定量分析了此编码结构在瑞利和莱斯衰落情况下的性能衰减情况。仿真结果显示该结构在一定程度上弥补了空时码在衰落信道下的分集增益和编码增益的损失,降低了误码率,尤其在信噪比较大时改善更为显著。 |
| 关键词:
信道编码
空时码
RS码
级联码
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| An Improved Algorithm of Space-Time-Frequency (STF) Codes Based on a MIMO-OFDM System |
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| Bao Tao1, Liang Yongling2 |
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1. Department of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710129, China;
2. Department of Criminal Intelligence, China Criminal Police University, Shenyang 110854, China |
| Abstract: |
| The application of MIMO technology can remarkably increase the data rate of transmission, but many problems exist in the complex wireless communication environment, including multi-path fading, random noises, burst errors, and so forth. We believe that the combination of space-time codes with channel coding technique of the MIMO system can improve the data rate and assure the communication quality simultaneously. A novel concatenated code of full-rank space-time code as the inner code and RS as the outer code is constructed, and the performance of this concatenated code is quantitatively analyzed under Rayleigh and Rice fading channels. The simulation results and their analysis show preliminarily that this novel concatenated code, compared with the space-time code, can re-duce the BER and loss of diversity gain and coding gain under fading channels, especially at high channel signal-to-noise ratios. |
| Key words:
bit error rate
codes (symbols)
data communication systems
fading channels
MATLAB
orthogonal frequency division multiplexing
phase shift keying
probability density function
quadrature amplitude modulation
quadrature phase shift keying
resonance
signal to noise ratio
channel code
concatenated code
RS code
space-time code
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| 收稿日期: 2013-11-06
修回日期:
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| DOI: |
| 基金项目: 西北工业大学基础研究计划(JC20120206);国家留学基金(20120307003)资助 |
| 通讯作者:
Email： |
| 作者简介: 包涛(1983-),女,西北工业大学工程师,主要从事无线通信信道编译码理论研究。
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| 作者相关文章 |
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| 包涛 在本刊中的所有文章 |
| 梁永玲 在本刊中的所有文章 |
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参考文献: |
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相关文献: |
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1．包涛, 张会生, 董群峰.基于FPGA的空时编译码器实现[J]. 西北工业大学, 2012,30(1): 17-21 |
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