Multichannel MLSE equalizer with parametric FIR channel identification

Author

Chen, Jiunn-Tsair ; Kim, Joonsuk ; Liang, Jen-Wei

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

Volume

48

Issue

6

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

1923

Lastpage

1935

Abstract

We propose a parametric finite impulse response (FIR) channel identification algorithm, apply the algorithm to a multichannel maximum likelihood sequential estimation (MLSE) equalizer using multiple antennas, and investigate the improvement in the overall bit error rate (BER) performance. By exploring the structure of the specular multipath channels, we are able to reduce the number of channel parameters to provide a better channel estimate for the MLSE equalizer. The analytic BER lower bounds of the proposed algorithm as well as those of several other conventional MLSE algorithms in the specular multipath Rayleigh-fading channels are derived. In the derivation, we consider the channel mismatch caused by the additive Gaussian noise and the finite-length channel approximation error. A handy-to-use simplified BER lower bound is also derived. Simulation results that illustrate the BER performance of the proposed algorithm in the global system for mobile communications (GSM) system are presented and compared to the analytic lower bounds

Keywords

Gaussian noise; Rayleigh channels; antenna arrays; array signal processing; cellular radio; direction-of-arrival estimation; diversity reception; equalisers; error statistics; maximum likelihood sequence estimation; multipath channels; telecommunication channels; transient response; BER performance; DOA estimation; GSM system; MLSE algorithms; additive Gaussian noise; analytic BER lower bounds; antenna arrays; bit error rate; channel estimate; channel mismatch; channel parameters; finite impulse response; finite-length channel approximation error; global system for mobile communications; maximum likelihood sequential estimation; multichannel MLSE equalizer algorithm; multiple antennas; parametric FIR channel identification; simulation results; spatial diversity; specular multipath Rayleigh-fading channels; Additive noise; Algorithm design and analysis; Bit error rate; Equalizers; Finite impulse response filter; GSM; Gaussian noise; Maximum likelihood estimation; Multipath channels; Rayleigh channels;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.806785

Filename

806785