Time-frequency code for multicarrier DS-CDMA systems

Author

Wang, Yi ; Gao, Lu ; Zhao, Ming ; Chen, Jun ; Zhang, Zhongpei ; Yao, Yan

Author_Institution

Sate Key Lab. On Microwave & Digital Commun., Tsinghua Univ., Beijing, China

Volume

3

fYear

2002

fDate

6/24/1905 12:00:00 AM

Firstpage

1224

Abstract

A novel trellis coded modulation scheme for a multicarrier DS-CDMA system is studied in this paper. 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 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 trellis coded modulation is much better than that of the traditional system while not occupying additional spectral bandwidth.

Keywords

code division multiple access; diversity reception; error statistics; mobile radio; spread spectrum communication; time-frequency analysis; trellis coded modulation; bit error rate performance; code design criterion; coding gain; direct sequence code-division multiple-access systems; diversity gain; multicarrier DS-CDMA system; time frequency domain; transmission diversity; trellis coded modulation; Bandwidth; Bit error rate; Channel coding; Euclidean distance; Frequency diversity; Modulation coding; Multiaccess communication; OFDM; Time frequency analysis; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th

Print_ISBN

0-7803-7484-3

Type

conf

DOI

10.1109/VTC.2002.1002809

Filename

1002809