Improved channel decoding for the CDMA forward link chip-level LMMSE receiver

被引：0
|
作者：
Messier, GG [1 ]
Krzymien, WA
机构：
[1] Univ Calgary, Dept Elect & Comp Engn, Calgary, AB T2N 1N4, Canada
[2] TRLabs, Calgary, AB T2N 1N4, Canada
[3] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 2V4, Canada
[4] TRLabs, Edmonton, AB T6G 2V4, Canada
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2006年 / 55卷 / 01期
基金：
加拿大自然科学与工程研究理事会;
关键词：
channel state estimation; code division multiple access (CDMA); LMMSE equalization; Rake receiver; turbo codes;
D O I：
10.1109/TVT.2005.861168
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper investigates how to improve channel decoder trellis path metric calculations when convolutional or turbo codes are combined with the chip-level linear minimum mean square error (LMMSE) code division multiple access (CDMA) mobile receiver. These metric calculations require channel state information (CSI) that consists of desired signal amplitude and interference plus noise variance. Several techniques suitable for use with the chip-level LMMSE receiver are presented for estimating CSI. Chip-level simulations are used to evaluate CDMA forward link performance when these techniques are used by the mobile. The results indicate that the channel state estimation scheme that provides the best forward link performance depends on the type of channel code and channel decoder algorithm used in the system.
引用
收藏
页码：405 / 410
页数：6
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