Correlation matching in channel estimation for multirate DS/CDMA

被引：0
|
作者：
Liu, P [1 ]
Xu, ZY [1 ]
机构：
[1] Univ Calif Riverside, Dept Elect Engn, Riverside, CA 92521 USA
来源：
2002 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS I-IV, PROCEEDINGS | 2002年
关键词：
D O I：
暂无
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
Channel estimation is studied for a multicode (MC) or multiple processing gain (MPG) multirate CDMA system based on correlation matching. All users are partitioned into groups in terms of their raw data rates. Since a communication channel may span several symbol intervals especially for a high rate user, severe intersymbol interference (ISI) exists in the received data. However, signature waveforms of various symbols from a user are convolutions of spreading codes with a common channel. This structure is beneficial to channel estimation due to multiple contributions to the output correlation. By properly selecting a weighting matrix in the matching cost function, significant improvement is observed. The optimal weighting matrix and covariance of the channel estimate are farther derived in closed forms.
引用
收藏
页码：2581 / 2584
页数：4
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