摘要: DS-CDMA系统不仅支持话音、数据等业务,而且还支持各种多业务。由于各种业务对功率和误块率的要求不同,因此外环功控策略必须兼顾2种不同业务的需求。针对该问题,改进DS-CDMA移动通信系统功率控制的理论模型,使每种业务类型都拥有各自独立的外环功率控制环路,并按单业务外环功控算法产生各自的目标信干比。实验结果证明,改进的外环功控算法能有效支持多业务,具有实 用性。
关键词:
直接扩频码分多址接入,
外环功控,
多业务
Abstract: DS-CDMA system can not only support voice and data service, but also support multi-service. Because the requirement of power and BLock Error Rate(BLER) is different for different services, Outer Loop Power Control(OLPC) strategies must take measures to support different services. This paper introduces the ever existed problems about DS-CDMA OLPC for multi-service and analyzes the power control theoretical model. The improved OLPC brings its own target SIR adjustment command as the single service OLPC. The OLPC algorithm is improved and the performance comparisons between the old algorithm and the improved algorithm are given. Experimental results show the good performance of the improved OLPC algorithm and prove the validity for multi-service.
Key words:
DS-CDMA,
Outer Loop Power Control(OLPC),
multi-service
中图分类号:
管明祥, 王瑞春, 李兴. DS-CDMA多业务外环功控改进算法[J]. 计算机工程, 2011, 37(01): 280-281,284.
GUAN Meng-Xiang, WANG Rui-Chun, LI Xin. Improved DS-CDMA Outer Loop Power Control Algorithm for Multi-service[J]. Computer Engineering, 2011, 37(01): 280-281,284.