Decision-directed coherent detection in multicarrier systems on Rayleigh fading channels

Author

Frenger, P.K. ; Svensson, Bertil

Author_Institution

Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg

Volume

48

Issue

2

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

490

Lastpage

498

Abstract

Novel coherent detectors for DQPSK and π/4-DQPSK on Rayleigh fading channels are presented. The detectors are based on decision feedback and minimum mean-square error (MMSE) channel estimation. The proposed detectors may be used in both single carrier and multicarrier systems. Analytical results in the form of expressions for channel estimation error variance and bit error probability, both with and without diversity, are derived. The MMSE-based detector has a significantly lower irreducible bit error probability floor compared to a conventional differential detector. For most practical applications, the error floor of the MMSE-based detector is negligible. Simulated results are presented to verify the analysis and justify the approximations made

Keywords

Gray codes; Rayleigh channels; cellular radio; digital radio; diversity reception; error statistics; feedback; least mean squares methods; modulation coding; quadrature phase shift keying; signal detection; π/4-DQPSK; DQPSK; Gray coded DQPSK; MMSE channel estimation; Rayleigh fading channels; approximations; bit error probability; channel estimation error variance; coherent detectors; decision feedback; decision-directed coherent detection; digital cellular mobile telephone systems; diversity; irreducible bit error probability floor; minimum mean-square error; multicarrier systems; simulated results; single carrier systems; Analysis of variance; Analytical models; Channel estimation; Detectors; Error probability; Fading; Feedback; HDTV; OFDM modulation; Telephony;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.752573

Filename

752573