DS/CDMA系统中的多址干扰联合估计算法

Amplitude-Phase Combined Estimation of Multiple Access Interference in DS/CDMA Systems

针对DS/CDMA系统中现有的多址干扰消除算法复杂、难以实时运算的困难,本文提出了一种无需估计干扰相位的联合估计算法,简化了干扰消除电路的结构,提高了运算速度。理论分析和计算机仿真结果均表明,这种多址干扰消除算法的性能优于直接估计法和单用户检测接收机,并有一定的抗“远近效应”的能力。

Most existing algorithms of the multiple access interference cancellation for DS/CDMA systems are complex and compute time consuming. This paper presents a novel algorithm named amplitude-phase combined interference estimation, which requires no preknowledge of the carrier phase and leads to much simpler implementation circuits and faster calculation speed. Analysis and computer simulation show that,in addition to certain degree of suppression to the 'near-far'detri- ment.this algorithm outperforms the direct estimation method and the single-user detector.