Low-complexity joint MLSE receiver in the presence of CCI

Author

Chen, Jiunn-Tsaid ; Liang, Jen-Wei ; Tsai, Huan-Shang ; Chen, Young-Kai

Author_Institution

Dept. of Electr. Eng., Stanford Univ., CA, USA

Volume

2

Issue

5

fYear

1998

fDate

5/1/1998 12:00:00 AM

Firstpage

125

Lastpage

127

Abstract

We address the problem of receiving a digitally modulated signal in the presence of another identically modulated cochannel interference (CCI) signal. We propose a joint maximum-likelihood sequential estimation (MLSE) algorithm that uses a dynamic channel description (J-MLSE/DCD). This algorithm deals with CCI more effectively while keeping the overall complexity low. In the proposed algorithm, we adaptively truncate the channels of both the desired signal and the CCI according to their individual power, thereby greatly reducing the complexity. Simulation results for the GMSK modulated signals used in the Global System for Mobile Communications (GSM) system are presented. The proposed algorithm performs much better than the spatial-whitened MLSE and is comparable to the high-complexity joint MLSE.

Keywords

array signal processing; cellular radio; cochannel interference; direction-of-arrival estimation; equalisers; interference suppression; land mobile radio; maximum likelihood estimation; minimum shift keying; multipath channels; radio networks; radio receivers; sequential estimation; DOA; GMSK; GSM system; Global System for Mobile Communications; MLSE algorithm; MLSE equalizer; channel truncation; cochannel interference; digitally modulated signal; dynamic channel description; low-complexity joint MLSE receiver; maximum-likelihood sequential estimation; mobile radio networks; modulated CCI signal; multipath propagation model; simulation results; spatial-whitened MLSE; Baseband; Bit error rate; Channel capacity; Digital modulation; Frequency; GSM; Interchannel interference; Maximum likelihood estimation; Radiofrequency interference; Signal processing;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/4234.673655

Filename

673655