CDMA中的半盲恒模算法
Semi-blind Constant Modulus Algorithm for CDMA System
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摘要: 该文研究了应用于CDMA上行链路多用户检测中的半盲恒模算法。它首先利用非盲算法消除所有小区内干扰用户的影响,接着再利用盲算法抵消剩余的干扰。通过仿真实验,将之与盲恒模算法及解相关算法相比较,可以看出在于扰用户增多时,本文提出的半盲恒模算法的性能明显优于另外两种算法。
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关键词:
- CDMA; 多用户检测; 半盲恒模
Abstract: The semi-blind Constant Modulus (CM) algorithm which applied in the Multi-User Detection (MUD) of CDMA is studied. This approach fully utilizes all known users information, performs not-blind detector to suppress the interferes within the cell, and exploits blind detector to suppress the inter-cell interference. Compared with the blind CM algorithm and the decorrelating algorithm, the proposed semi-blind CM algorithm exhibits better SIR and BER performances and it is more robust when the system is heavily loaded. -
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