Rate-adaptive convolutional coded fixed spreading length (CCFSL) scheme for multi-rate MC-CDMA

Author

Tan, Mizhou ; Ibars, Christian ; Bar-Ness, Yeheskel

Author_Institution

Center for Commun. & Signal Process. Res., New Jersey Inst. of Technol., Newark, NJ, USA

Volume

2

fYear

2002

fDate

27-30 Oct. 2002

Firstpage

663

Abstract

In this paper, a new rate-adaptive convolutional coded fixed spreading length (CCFSL) multi-rate transmission scheme is proposed for MC-CDAM system. By using rate-compatible punctured convolutional (RCPC) codes and nested codes, all lower rate users are rate-adaptively encoded to become virtual highest rate users, which significantly improves their spectral utilization efficiency. With this new scheme, great flexibility in rate matching can be achieved. An upper bound is derived for the performance in the correlated Rayleigh fading channel. Furthermore the BER performance versus signal-to-noise ratio (SNR) and interference-to-signal ratio (ISR) of this scheme are compared with the VFSL and block coded fixed spreading length (BCFSL) scheme by simulation.

Keywords

Rayleigh channels; adaptive codes; code division multiple access; convolutional codes; error statistics; mobile radio; BCFSL scheme; BER performance; CCFSL scheme; RCPQ codes; block coded fixed spreading length scheme; correlated Rayleigh fading channel; interference-to-signal ratio; lower rate users; multi-rate MC-CDMA; nested codes; rate compatible punctured convolutional codes; rate matching; rate-adaptive convolutional coded fixed spreading length multi-rate transmission scheme; rate-adaptive convolutional coded fixed spreading length scheme; signal-to-noise ratio; spectral utilization efficiency; Bandwidth; Bit error rate; Block codes; Convolution; Convolutional codes; Decoding; Fading; Interference; Multicarrier code division multiple access; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Personal Multimedia Communications, 2002. The 5th International Symposium on

ISSN

1347-6890

Print_ISBN

0-7803-7442-8

Type

conf

DOI

10.1109/WPMC.2002.1088257

Filename

1088257