智能天线与多用户检测的联合抗干扰模型构建

Combined Anti-Interference Technology Based on Smart Antenna and Multi-User Detection

联合抗多址干扰技术是目前移动通信技术研究的热点.将智能天线与多用户检测技术相结合可抑制相干干扰,改善系统的误码率性能,提高移动通信系统的有效性与可靠性,优化无线资源的利用率.提出了采用智能天线接收后进行多用户检测的CDMA系统模型,并引入基于LMS算法的自适应滤波器来消除窄带干扰.Matlab软件仿真结果表明,联合抗干扰模型较好地提升了误码率性能.

The combined technology against multiple access interference is a new research field. This arti- cle combines smart antenna with the multi-user detection to suppress coherent interference and to im- prove the bit error rate of the system. In addition,it adopts these key technologies for wireless resource utilization. The paper puts forward a CDMA system model of using multi-user detection after smart an- tenna,and meanwhile introduces the adaptive filter based on LMS algorithm to eliminate the narrow band interference. At last,it analyzes the nature through Matlab simulation. The results show that the joint anti-interference has better bit error rate performance.