MMSE Turbo Equalizer for Channels with Cochannel Interference

Author

Gong, Y. ; Ding, Z. ; Cowan, C.F.N.

Author_Institution

Inst. of Electron., Commun. & Inf. Technol., Belfast Queen´´s Univ.

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

The MMSE turbo equalizer has excellent performance with moderate complexity. Current realizations of an MMSE turbo equalizer usually assume the equalizer output is Gaussian, which, however, may not be true for channels with co-channel interference (CCI). In this paper, we first show that, in presence of CCI, a linear pre-whitener is required to decorrelate the CCI-plus-noise. Then we apply density estimation for the residual noise at the equalizer output to further improve the performance. Numerical simulations are also shown to verify the analysis

Keywords

cochannel interference; equalisers; least mean squares methods; mobile radio; wireless channels; MMSE turbo equalizer; channels; cochannel interference; density estimation; linear pre-whitener; minimum mean square error; residual noise; Decorrelation; Equalizers; Frequency; Gaussian noise; Information technology; Interchannel interference; Intersymbol interference; Iterative decoding; Numerical simulation; Radiofrequency interference;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660999

Filename

1660999