基于快速独立分量分析的异步多用户检测方法

The Asynchronous Multi-user Detector Based on Fast Independent Component Analysis

深入分析了非理想功率控制下异步CDMA多用户接收机的信号特点,推导出了多小区接收信号模型。提出了基于快速独立分量分析(Fast Independent Component Analysis,FastICA)的异步多用户检测方法,该方法具有抗远近效应,抗多址干扰的能力。仿真结果表明:该算法具有迭代次数少、计算量小、多用户分离效果好的优点,非常适合于非理想功率控制下的多用户检测,该方法大大提高了非理想功率控制下多用户接收机的性能。

With a deep analysis of the signal characteristics of CDMA receiver on unideal power control instance,the current research deduced the receiving signal model of multi-cell.Furthermore,the research presented the asynchronous multi-user detection method based on FastICA,which is naturally near-far and multiple-access interference resistant.The simulation results show that： this method has less iterative time,small computational complexity and good performance of multi-user detection,which can enhance the capability of multi-user receiver and is very suitable for asynchronous multi-user detection on unideal power control.