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比特交织串行级联MSK系统性能分析 被引量:1

Performance analysis of serially concatenated minimum shift keying with bit-interleaver
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摘要 研究了在接收端采用联合迭代解调和译码的比特交织的串行级联MSK系统.与采用简单相移键控载波调制的串行级联码相比,比特交织串行级联MSK系统可以获得更高的带宽效率.理论分析和性能仿真结果表明:比特交织器的类型对系统性能的影响非常大,伪随机比特交织是理想的选择方案,串行级联MSK系统的性能随着交织长度增加而提高;串行级联MSK系统的误比特性能随着迭代次数增加而提高;当迭代次数达到一定次数之后,继续增加迭代次数对系统性能的改善有限,通常迭代次数<12次;约束长度为3的卷积码是外码比较好的选择. The serially concatenated minimum shift keying (MSK) system with bit-interleaver when the receiver employs iterative decoding and demodulation was investigated. Compared with serially concatenated code which employed traditional shift keying modulation, serially concatenated MSK with bit-interleaver had a better performance with high bandwidth efficiency. Theoretical analysis and performance simulation re- suits showed that:The influence of interleaving scheme system performance was very large and the pseudo- random interleaver was the ideal option;meanwhile, serial concatenated MSK system performance improved with the increase of the interleaving length and the number of iterations. When the number of iterations reached a certain number of times, continuous increase of the number of iterations had limited function in the performance improvement of the system. Usually the number of iterations was less than 12 times. The outer code was convolutional code with constraint length 3, which was a better choice.
出处 《郑州轻工业学院学报(自然科学版)》 CAS 2013年第4期82-85,94,共5页 Journal of Zhengzhou University of Light Industry:Natural Science
基金 国家自然科学基金项目(U1204606)
关键词 迭代译码 MSK 串行级联编码 iterative decoding minimum shift keying (MSK) serial concatenated codes
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