SISO-FBMC系统中基于迭代的IAM信道估计  

IAM Channel Estimation based on Iteration in SISO-FBMC System

作　　者：何宗苗 何元驹 罗英喆 HE Zongmiao;HE Yuanju;LUO Yingzhe(No.10 Institute of CETC,Chengdu Sichuan 610036,China;Technology Co.,Ltd.of DJ Innovation of Shenzhen,Shenzhen Guangdong 518000,China;University of Electronic Science and Technology of China,Chengdu Sichuan 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,四川成都610036 [2]深圳市大疆创新科技有限公司,广东深圳518000 [3]电子科技大学,四川成都610036

出　　处：《通信技术》2021年第1期38-43,共6页Communications Technology

摘　　要：在滤波器多载波系统(Filter Bank Multi-Carrier,FBMC)中,干扰估计的方法(Interference Approximation Method,IAM)将干扰信号视作导频信号的一部分,从而提高导频的等效功率,达到更好的信道估计效果。实际上,数据部分的干扰信号也可以用作等效的导频功率。基于这个思想,提出在IAM方法中引入(Low Density Parity-Check Code,LDPC)外迭代的信道编译码算法。该方法通过LDPC译码后的数据反向迭代重构数据干扰,得到更精确的等效导频从而获得更好的信道估计效果。理论分析和仿真结果表明,在平坦衰落和高斯白噪声(Additional White Gaussian Noise,AWGN)信道下,相对于传统的迭代信道估计方法,基于LDPC译码的外迭代方案的误码率(Bit Error Rate,BER)性能有一定的提升。In FBMC(Filter Bank Multi-Carrier)system,IAM(Interference Approximation Method)method regards the interference signal as a part of the pilot signal,thereby increasing the equivalent power of the pilot and achieving a better channel estimation effect.In fact,the interference signal of the data can also be used as the equivalent pilot power.Based on this idea,a channel coding/decoding algorithm that introduces LDPC(Low Density Parity-Check Code)outer iteration into IAM method is proposed.This method reconstructs the data interference through the inverse iteration of the data decoded by LDPC,and obtains a more accurate equivalent pilot signal,so as to acquire a better channel estimation effect.Theoretical analysis and simulation results indicate that in flat fading and AWGN(Additional White Gaussian Noise)channels,compared with the traditional iterative channel estimation method,the BER(Bit Error Rate)performance of the outer iterative scheme based on LDPC decoding has a certain performance improvement.

关 键 词：滤波器多载波(FBMC) IAM 信道估计 LDPC 误码率 

分 类 号：TN911.72[电子电信—通信与信息系统]