TD-SCDMA系统中基于时域数据统计信息的信道估计算法  

An Improved Channel Estimation in TD-SCDMA System Based on Statistical Channel Information of the Data Field

作　　者：樊同亮 孙严冬 杜永锋 赵雪 

机构地区：[1]公安海警学院电子技术系,宁波315801

出　　处：《科技通报》2015年第3期207-210,共4页Bulletin of Science and Technology

基　　金：浙江省教育厅科研项目(Y201431731);浙江省规划课题(14NDJC256YB);公安海警学院项目(2013XYPYZ012)

摘　　要：TD-SCDMA系统中运用的B.Steiner估计器是一种低代价的信道估计器,由于受到噪声的影响,其导致估计的精度有限。以Steiner算法为基础,有多种基于门限处理的信道估计算法,如何设置门限是这类改进算法的关键问题。本文对信道估计算法的时域结果进行能量检测,基于时域数据统计信息给出信道估计改进算法。仿真结果表明,改进的信道估计使系统的性能获得较大的改善与提高。B. Steiner estimator used in the time-division synchronous code-division multiple access （TDSCDMA）system is a low cost estimator. The precision of the estimated channel impulse responses （CIRs）is affected by noises in the channel, which result in worse performance of the estimation. There aremany threshold processing algorithms which are based on Steiner algorithm, so the optimal thresholdvalue becomes a crucial factor. In this paper, based on statistical information of channel in the data field,an improved channel estimation algorithm is proposed by detecting energy of CIR’s tap in time-domain.The simulation result has shown that the system performance is considerably improved.

关 键 词：时分双工同步码分多址 信道估计 能量探测 门限后处理 

分 类 号：TN929[电子电信—通信与信息系统]