| 混沌与 Walsh 复合扩频序列性能分析 |
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| 引用本文： | 杜秀丽,甄旭亮,邱少明.混沌与 Walsh 复合扩频序列性能分析[J].大连大学学报,2013(6):13-17. |
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| 作者姓名： | 杜秀丽 甄旭亮 邱少明 |
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| 作者单位： | 大连大学信息工程学院辽宁省通信网络与信息处理重点实验室,辽宁大连116622 |
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| 基金项目： | 国家高技术研究发展计划（863计划）资助课题（2012AA80XX03G）. |
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| 摘 要： | 直接序列扩频系统中，扩频序列的选择是个关键问题。扩频序列性能的好坏，直接关系到直接扩频通信系统整体性能的优劣，如抗干扰、抗衰落、同步与跟踪等性能。由于复合序列具有更高的复杂性和抗干扰能力，现已逐步代替传统的扩频序列。为此，提出一种混沌序列与Walsh序列相复合的复合序列，并对复合序列的抗干扰性能、子序列对复合序列性能的影响进行分析，仿真结果表明新的复合序列较传统序列有更强的抗干扰能力，且该复合序列的抗干扰性能不受子序列初始值影响，具有很高的应用价值。
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| 关 键 词： | 直接序列扩频 复合序列 混沌序列 误码率 |
Performance Analysis of Chaotic and Walsh Composite Sequence |
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| DU Xiu-li,ZHEN Xu-liang,QIU Shao-ming.Performance Analysis of Chaotic and Walsh Composite Sequence[J].Journal of Dalian University,2013(6):13-17. |
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| Authors: | DU Xiu-li ZHEN Xu-liang QIU Shao-ming |
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| Institution: | (Key Laboratory of Communications Network and Information Processing, Information Engineering College, Dalian University, Dalian 116622, China) |
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| Abstract: | The choice of spread spectrum sequence is a key issue in the direct sequence spread spectrum （DSSS） system. The performance of spread spectrum sequence is directly related to the overall performance of a DSSS system, such as anti-jamming, anti-fading, synchronization and tracking performance. Because of better complexity and anti-jamming capability, the composite spread spectrum sequences have been gradually replacing the traditional spread spectrum sequences. A new composite spread spectrum sequence was proposed based on the chaotic sequence and Walsh sequence. The anti-jamming capability of the proposed sequence and the effect of sub-sequence were analyzed. The simulation results showed that the new composite spread spectrum sequence has better anti-jamming ability than traditional spread spectrum sequences and its anti-jamming ability was hardly affected by the initial value of sub sequences. It has highly value in application. |
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| Keywords: | DSSS composite sequence chaotic sequence bit error rate （BER） |
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