Turbo decoding in a Rayleigh fading channel with estimated channel state information

被引：0
|
作者：
Shin, HD [1 ]
Kim, SW [1 ]
Lee, JH [1 ]
机构：
[1] Seoul Natl Univ, Sch Elect Engn, Gwanak Gu, Seoul 151742, South Korea
来源：
IEEE VEHICULAR TECHNOLOGY CONFERENCE, FALL 2000, VOLS 1-6, PROCEEDINGS: BRINGING GLOBAL MOBILITY TO THE NETWORK AGE | 2000年
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D O I：
暂无
中图分类号：
U [交通运输];
学科分类号：
08 ; 0823 ;
摘要：
In this paper a new method to estimate the parameter for turbo decoding using the maximum a posteriori probability (MAP) algorithm is proposed for a turbo code in a Rayleigh fading channel with imperfect channel estimation. This parameter is called the channel reliability factor and is related with the channel SNR. For channel estimation, pilot symbol assisted modulation (PSAM) is used and the channel reliability factor for PSAM is derived. It is shown that the proposed estimator for the channel reliability factor does not degrade the error performance of turbo codes, compared with the case in which the channel reliability factor is exactly known to the decoder It is also shown that the performance gain of Log-MAP algorithm over Mar-Log-MAP algorithm can be maintained by using the correct channel reliability factor; irrespective of the channel estimation error.
引用
收藏
页码：1358 / 1363
页数：6
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