Performance of differential modulation with wireless relays in Rayleigh fading channels

Author

Zhao, Qiang ; Li, Hongbin

Author_Institution

Dept. of Electr. & Comput. Eng., Stevens Inst. of Technol., Hoboken, NJ, USA

Volume

9

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

343

Lastpage

345

Abstract

We propose a new amplify-and-forward scheme amenable to differential modulation for cooperative systems with wireless relays. We derive closed-form expressions of the probability density function (PDF) of the signal-to-noise ratio (SNR) and average bit-error rate (BER) for the proposed scheme and the analytical results are confirmed with numerical simulations. An asymptotic analysis reveals that the proposed cooperative scheme with one relay offers a diversity order approaching two in Rayleigh fading channels as the average SNR increases.

Keywords

Rayleigh channels; diversity reception; error statistics; numerical analysis; probability; BER; PDF; Rayleigh fading channel; amplify-and-forward scheme; bit-error rate; closed-form expression; cooperative diversity; cooperative systems; differential modulation; numerical analysis; probability density function; wireless relays; Bit error rate; Channel estimation; Closed-form solution; Cooperative systems; Digital relays; Fading; Probability density function; Research and development; Signal analysis; Signal to noise ratio;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2005.1413628

Filename

1413628