Paper Info
Title
An improved iterative channel estimation based LTE Downlink.
Abstract
In this paper, we propose an iterative detecting and decoding method in LTE Downlink OFDM system based on reference aided channel estimation. Estimates of the complex channel gain and variance of the additive noise are derived first from known reference symbols and channel estimate filter. After turbo decoding, the decoded bits have been obtained. In order to obtain estimates of channel gain more accuracy, we adopted more reference symbols which modulate the decoded bits at the receiver again to estimate the channel frequency response. Also the mapping position of the OFDM symbols is consistent with first transmission. Through estimation of the channel iteratively, we can use more systems bits as iterative reference symbols. Simulation results shows that through the iterative channel estimation, the initial insert reference symbols have been reduced, the accuracy of channel estimation improved effectively and the bits error rate of the OFDM system can approach the perfect channel estimates. © 2012 IEEE.
Year
DOI
Venue
2012
10.1109/FSKD.2012.6233908
FSKD
Keywords
DocType
Volume
channle estimation,iterative,ls,turbo,estimation,downlink,turbo codes,frequency response,decoding,ofdm modulation,ofdm,bit error rate,iterative methods,accuracy
Conference
null
Issue
Citations 
PageRank 
null
3
0.47
References 
Authors
5
6
Name
Order
Citations
PageRank
Ting Peng1539.09
Xizhong Lou2276.37
Jia Xu329836.94
Qing Zhou445449.57
Xiaochen Li530.81
Yanmin Chen6253.27