A Semi-blind Estimation Algorithm in CDMA Dispersive Channels

被引：0
|
作者：
Wu Bo [1 ]
Jia Chunhua [1 ]
Gu Tianxiang [1 ]
机构：
[1] Univ Elect Sci & Technol China, Coll Automat, Chengdu 610054, Peoples R China
来源：
PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON TEST AUTOMATION & INSTRUMENTATION, VOLS 1-2 | 2008年
关键词：
Semi-blind channel estimation; Dispersive channels; Intersymbol interference channels; Short-code CDMA;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A semi-blind method suitable for dispersive channels is proposed, which exploits the information contained within known pilot symbols. Intersymbol interference need to be consider in short-code mobile wireless CDMA measurement and control systems. In order to reduce such intersymbol interference, after a coarse channel estimation with pilot symbols, the unknown symbols can be estimated with the coarse channel estimation, then the refined channel estimation can be reached with the estimated symbols without training sequences, so the algorithm utilizes a few pilot symbols only and doesn't occupy extra bandwidth. Furthermore the proposed algorithm can alleviate the noise effect with means method also. It has lower computational complexity and better performance than that of usual blind algorithm based on second-order statistics.
引用
收藏
页码：133 / 135
页数：3
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