摘要
TD-SCDMA集群系统中会存在各种干扰,一些通过抑制干扰提高系统容量的技术被考虑采纳,如智能天线、多用户检测和功率控制等。传统的功控算法无法消除来自集群群组间的用户干扰。先用波束赋形进行主波瓣外干扰抑制,然后进行多群组联合检测消除波瓣内群组间干扰,从而降低系统对功率控制的要求,提高性能。仿真证明,上述算法能有效降低系统发射功率和抑制干扰。
The trunking systems based on TD-SCDMA network are limited by the interference that users create for each other. Several methods of controlling and suppressing the interference through beamforming, muhiuser detection and power control are adopted. Conventional power control algorithm can＇t eliminate adjacent group interference. In this paper, the beamforming to suppress the interference outside the main lobe is used, then the joint detection of multiple groups to remove both intra-group and inter-group MAI in the lobe for the uplink receiver are used, thus reducing system requirements on power control, the performance has been improved. Simulation proved that the algorithm can effectively reduce transmission power and suppress the interference in the system.
出处
《电视技术》
北大核心
2011年第3期77-80,共4页
Video Engineering
基金
国家"863"计划重点项目(2009AA011302)
重庆市教委科研项目(KJ090513)
