Time-frequency coded modulation scheme for multicarrier DS-CDMA systems

Author

Gao, Lu ; Wang, Yi ; Zhou, Sheng ; Li, Wenyu ; Wu, Weiling

Author_Institution

Dept. of Inf. Eng., Beijing Univ. of Posts & Telecommun., China

Volume

2

fYear

2002

fDate

2-5 Sept. 2002

Firstpage

380

Abstract

A novel time-frequency coded modulation scheme for multicarrier DS-CDMA systems is studied. Based on the concept of transmission diversity in the time-frequency domain, we propose a code design criterion that includes diversity gain and coding gain. In terms of the proposed criterion, we can search for trellis codes that have larger coding gain while keeping the maximum diversity. Results show that the bit error rate performance of the system with the novel time-frequency coded modulation is much better than that of traditional system while not occupying additional spectral bandwidth.

Keywords

channel coding; code division multiple access; diversity reception; error statistics; spread spectrum communication; trellis coded modulation; BER; MC-CDMA; TCM; bit error rate performance; channel coding; coding gain; diversity gain; multicarrier DS-CDMA; spectral efficiency; time-frequency coded modulation; time-frequency domain; transmission diversity; trellis coded modulation; trellis codes; Bandwidth; Bit error rate; Convolutional codes; Digital modulation; Diversity methods; Euclidean distance; Modulation coding; Multiaccess communication; OFDM; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on

Print_ISBN

0-7803-7627-7

Type

conf

DOI

10.1109/ISSSTA.2002.1048568

Filename

1048568