一种应用于TDD-CDMA系统的信干比估测方法  

A SIR Estimation Method in TDD-CDMA System

作　　者：王晓婷[1] 赵宗印[1] 李俊文[2] 

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]西安通信学院,陕西西安710106

出　　处：《无线电工程》2006年第12期35-37,共3页Radio Engineering

摘　　要：结合TDD-CDMA系统帧结构的特点,提出了基于正交解扩的信干比(SIR)估计方法。根据该估计方法,设计了直接预测、线性插值预测和卡尔曼滤波预测等3种易于实现的SIR预测算法。理论研究与仿真结果表明,基于正交解扩的SIR估计算法在不同信道条件和不同传输方式下都有比较好的性能,直接预测算法与其他2种算法相比,综合性能最好。This paper presents an SIR estimation method based on orthogonal dispreading taking the advantage of frame structure of TDD- CDMA system and compares three easy applied SIR prediction algorithms- direct prediction, linear interpolation prediction and kalman prediction.The theoretical analysis and simulating results show that the proposed SIR estimation technique can perform well with different modulation in various wireless environment, and the overall performance of the processing SIR direct prediction on this foundation are the best among the three.

关 键 词：TDD—CDMA 信干比估计 正交解扩 信干比预测 

分 类 号：TN929.533[电子电信—通信与信息系统]