A novel iterative method for turbo equalization

Xiang Cheng, Cheng Xiang Wang, Dongfeng Yuan, Hsiao H. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A number of turbo equalization (TE) methods with reduced complexity have recently been introduced, in which the maximum a posteriori probability (MAP) equalizer is replaced by suboptimal and low complexity ones. These methods can save the computational complexity significantly, but with sacrificed system performance. In this paper, we first use the extrinsic information transfer (EXIT) chart tool to visually explain why these suboptimal methods have the worse performance. Then, we propose a novel iterative method for TE which takes advantage of both parallel and serial concatenation turbo-like schemes. In the novel iterative method, the EXIT chart switches between the two schemes as a balance. The transmitter side is also changed correspondingly by utilizing the concept of repetition code to acquire a structure similar to turbo codes. It is shown from both analytical and simulation results that the proposed iterative method for TE results in the excellent system performance while its realization complexity is kept relatively low. © 2007 IEEE.

Original languageEnglish
Title of host publication2007 IEEE Wireless Communications and Networking Conference, WCNC 2007
Pages489-493
Number of pages5
DOIs
Publication statusPublished - 2007
Event2007 IEEE Wireless Communications and Networking Conference - Kowloon, China
Duration: 11 Mar 200715 Mar 2007

Conference

Conference2007 IEEE Wireless Communications and Networking Conference
Abbreviated titleWCNC 2007
CountryChina
CityKowloon
Period11/03/0715/03/07

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    Cheng, X., Wang, C. X., Yuan, D., & Chen, H. H. (2007). A novel iterative method for turbo equalization. In 2007 IEEE Wireless Communications and Networking Conference, WCNC 2007 (pp. 489-493) https://doi.org/10.1109/WCNC.2007.95