Analysis of the effects of time delay spread on TCM performance

Author

Fan, Pingyi ; Letaief, Khaled ; Murch, Ross D.

Author_Institution

Dept. of Electr. Eng., Delaware Univ., Newark, DE, USA

Volume

17

Issue

7

fYear

1999

fDate

7/1/1999 12:00:00 AM

Firstpage

1212

Lastpage

1223

Abstract

We investigate the effect of time delay spread on trellis coded modulation (TCM) in a wireless radio environment where equalization is not employed to mitigate the effects of frequency selective fading when the time delay spread is small. Using a random variable decomposition technique and a Gaussian approximation of the intersymbol interference terms, we obtain explicit bounds for the pairwise error probability of TCM over multipath Rayleigh fading channels characterized by various power delay profiles. A method to calculate an upper bound of the bit error rate (BER) based on Jamali and LeNgoc (1995) bound is also presented. These bounds are used to evaluate TCM performance as well as investigate the delay spread tolerance limit of TCM, including I-Q TCM, over frequency selective fading channels

Keywords

Gaussian processes; Rayleigh channels; approximation theory; delays; error statistics; intersymbol interference; multipath channels; radiocommunication; random processes; trellis coded modulation; BER; Gaussian approximation; I-Q TCM; TCM performance; bit error rate; delay spread tolerance limit; explicit bounds; frequency selective fading; frequency selective fading channels; intersymbol interference; multipath Rayleigh fading channels; pairwise error probability; power delay profiles; random variable decomposition technique; time delay spread; trellis coded modulation; upper bound; wireless radio environment; Bit error rate; Delay effects; Fading; Frequency; Gaussian approximation; Intersymbol interference; Modulation coding; Performance analysis; Random variables; Rayleigh channels;

fLanguage

English

Journal_Title

Selected Areas in Communications, IEEE Journal on

Publisher

ieee

ISSN

0733-8716

Type

jour

DOI

10.1109/49.778180

Filename

778180