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卫星通信中基于扩频技术的异步差分空时协同编码研究

章坚武 章谦骅

章坚武, 章谦骅. 卫星通信中基于扩频技术的异步差分空时协同编码研究[J]. 空间科学学报, 2015, 35(5): 634-640. doi: 10.11728/cjss2015.05.634
引用本文: 章坚武, 章谦骅. 卫星通信中基于扩频技术的异步差分空时协同编码研究[J]. 空间科学学报, 2015, 35(5): 634-640. doi: 10.11728/cjss2015.05.634
ZHANG Jianwu, ZHANG Qianhua. Asynchronous Differential Space-Time Block Codes Based On Spreading Techniques Over Satellite Communication[J]. Journal of Space Science, 2015, 35(5): 634-640. doi: 10.11728/cjss2015.05.634
Citation: ZHANG Jianwu, ZHANG Qianhua. Asynchronous Differential Space-Time Block Codes Based On Spreading Techniques Over Satellite Communication[J]. Journal of Space Science, 2015, 35(5): 634-640. doi: 10.11728/cjss2015.05.634

卫星通信中基于扩频技术的异步差分空时协同编码研究

doi: 10.11728/cjss2015.05.634
基金项目: 国家自然科学基金项目资助(61102066)
详细信息
    通讯作者:

    章坚武,E-mail:121080014@hdu.edu.cn

  • 中图分类号: V443;TN927

Asynchronous Differential Space-Time Block Codes Based On Spreading Techniques Over Satellite Communication

  • 摘要: 卫星通信系统中, 经过不同信道的中继信号强度存在显著差异, 存在同步误差且时延差动态变化, 严重影响了误码性能. 传统方案一般通过引入差分编码解决卫星通信接收端的动态信道估计问题. 本文通过扩频系统中的正交码区分来自不同中继卫星的信号, 借助扩频码表提取各路信号后进行空时解码. 从仿真结果可知, 差分空时编码与扩频技术相结合能获得更好的误码率性能, 很好地解决了随机时延差问题, 使接收端无须对信道参数进行估计, 从而大幅降低其复杂度.

     

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出版历程
  • 收稿日期:  2014-09-28
  • 修回日期:  2015-04-15
  • 刊出日期:  2015-09-15

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