CDMA系统中联合功率控制、波束赋形与多用户检测

Joint power control, beamforming and multiuser detection for CDMA systems

应用功率控制、波束赋形和多用户检测可以有效地消除和减少CDMA系统中的干扰。本文结合波束赋形和多用户检测的特性,提出一种应用波束赋形增益和多用户相关矩阵的解相关算法。基于算法的复杂性,提出一种区分聚集用户进行多用户检测的的算法。由于波束赋形能够消减主瓣波束之外的多用户干扰,对聚集移动台采用解相关检测达到减少运算量和消除多用户干扰的目的。对算法进行了仿真分析,证明了本算法的优越性。

Interference in CDMA systems can be suppressed by power control, beamforming and multiuser detection. A new decorrelating multiuser detecting algorithm from beamforming gain and correlating matrix is proposed based on the characteristic of beamforming and muiltiuser detection. To reduce the computational complexity, an algorithm of decorrelating multiuser detection on clustered users is further proposed. Most of the interference from users out of cluster can be suppressed while the remaining interference can be eliminated by multiuser detection with less computatinal complexity. Simulation results show the improvement brought by this algorithm.