现代电子技术Issue(19)：18-20,24,4.
LDPC编码慢跳频系统中的一种信道状态估计算法
A channel state estimation algorithm for LDPC coding SFH system
戴精科 1何恒 1徐东辉1
作者信息
- 1. 第二炮兵工程大学，陕西 西安 710025
- 折叠
摘要
Abstract
Channel coding techniques can improve the anti-jamming capabilities of frequency-hopping systems,and the ac-curate channel state information is helpful for the error-bits rate of system. Based on the sum-product decoding process,a novel iterative decoding algorithm with channel estimation is proposed,in which the posteriori information of decoding result is fed back to the channel nodes,and then the probability of channel state is calculated again to generate the new log-likelihood ratios as the prior message of the next iteration. The channel estimation and coding information are updated by turns in those iterations. The simulation results show that,in the low density parity check (LDPC) coding slow frequency-hopping system with partial-band noise jamming,the proposed algorithm outperforms the traditional threshold-test algorithms,and only a few symbols in each frequency-hopping time slot are required to obtain the system performance similar to the case with perfect channel state in-formation.关键词
跳频/LDPC码/部分频带干扰/和积译码/迭代信道估计Key words
frequency-hopping/low density parity check coding/partial-band noise jamming/sum-product decoding/chan-nel estimation with iteration分类
信息技术与安全科学引用本文复制引用
戴精科,何恒,徐东辉..LDPC编码慢跳频系统中的一种信道状态估计算法[J].现代电子技术,2014,(19):18-20,24,4.
