| 摘要: |
| 给出了一种直扩通信系统的码同步方法.该方法的基本思想是首先完成扩频码的检测,然后比较将检测向量与期望用户扩频向量的相关值,得到接收信号中期望用户扩频码的相位,继而完成同步.这种方法的运算量较小,且不需要采用训练序列.文中给出了存在强多址干扰时,在高斯信道和瑞利衰落信道下的数值仿真结果. |
| 关键词: 抗干扰通信 直接序列扩频 多址干扰 主分量分析 同步 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:October 25, 2006Revised:March 20, 2007 |
| 基金项目: |
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| A DS-SS Sequence Synchronization Approach with Anti-Near-Far Effect Ability |
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| Abstract: |
| A novel DS synchronization approach based on Pricipal Components Analysis(PCA)is proposed.The key idea of the approach is to first detect the desired user's spread spectrum code,then compare the detected code and the real one.So the desired user code phase of received signal can be obtained and synchronization is achieved.The proposed approach is of relatively low computational complexity and non-training-sequence is needed.Simulations are performed when intense Multi-Access Interference(MAI)exists under Gaussian channel and Rayleigh fading channel.The numerical results show that reliable synchronization can be achieved using this approach. |
| Key words: aunti-interference communication,DS-SS,MAI,pricipal components analysis(PCA),synchronization |
