The effects of time delay spread on turbo-TCM in a wireless communication channel

Author

Fei, Xiaofan ; Ko, Tszmei

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Clear Water Bay, Hong Kong

Volume

1

fYear

1997

fDate

4-7 May 1997

Firstpage

334

Abstract

This paper presents some simulation results on the performances of turbo-codes with multilevel modulation (turbo-TCM) in a wireless environment. The wireless channel is modeled as a frequency selective fading channel with two time delay spread profiles, namely, a two-ray profile and a one-sided exponential profile. Turbo-TCM codes constructed from punctured turbo-codes combined with different modulation schemes are studied. It is found that turbo-TCM achieves unmatched performance of average irreducible BER. Turbo-TCM has much lower error probability than conventional TCM, especially in channels with high delay spread

Keywords

concatenated codes; convolutional codes; error statistics; fading; multipath channels; trellis coded modulation; BER; error probability; frequency selective fading channel; multilevel modulation; one-sided exponential profile; parallel convolutional concatenated codes; punctured turbo-codes; time delay spread effects; turbo-TCM; turbo-codes; two-ray profile; wireless communication channel; Bit error rate; Delay effects; Error probability; Fading; Frequency; Intersymbol interference; Modulation coding; Multipath channels; Turbo codes; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1997, IEEE 47th

Conference_Location

Phoenix, AZ

ISSN

1090-3038

Print_ISBN

0-7803-3659-3

Type

conf

DOI

10.1109/VETEC.1997.596375

Filename

596375