Detection for OFDM Systems With Channel Estimation Errors Using Variational Inference

Author

Li, Feng ; Zhu, Shihua ; Rong, Mei

Author_Institution

Dept. of Inf. & Commun. Eng., Xi´´an Jiaotong Univ., Xi´´an

Volume

16

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

434

Lastpage

437

Abstract

This letter presents an iterative detection scheme for orthogonal frequency division multiplexing (OFDM) systems with imperfect channel state information (CSI). In deriving the proposed scheme, channel estimation error is combated by using the theory of variational inference. The proposed scheme deals with the channel impulse response parameters and detects the information symbols iteratively and jointly. The effectiveness of the new approach is demonstrated by Monte-Carlo simulations.

Keywords

Monte Carlo methods; OFDM modulation; channel estimation; Monte-Carlo simulations; OFDM systems; channel estimation errors; channel impulse response parameters; channel state information; orthogonal frequency division multiplexing; variational inference; Bit error rate; Channel estimation; Channel state information; Communication standards; Covariance matrix; Digital video broadcasting; OFDM modulation; Peak to average power ratio; Symmetric matrices; Wireless communication; Channel imperfections; orthogonal frequency division multiplexing (OFDM); variational inference;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2009.2016460

Filename

4812114