Application of block coded modulation (BCM) in direct-sequence spread-spectrum communication

Author

Yajuan, Luo ; Kwak, Kyung Sup

Author_Institution

Dept. of Electron. Eng., Inha Univ., Inchon, South Korea

Volume

2

fYear

2001

fDate

2001

Firstpage

1338

Abstract

BCM is a kind of coded modulation scheme proposed by Imai and Hirakawa (1977) which can obtain coding gains without compromising bandwidth efficiency. This paper investigates the application of BCM in DS/SSMA communication. In our system, a biorthogonal set of sequences is used to allow redundancy to be added via coding. In this way the Euclidean distance is increased when the code rate increases if we allow as many signature sequences as the number of signal points of the signal constellation of the original system. Simulation results are presented to show that our scheme can achieve large coding gains over those of an uncoded system of the same bandwidth expansion and data rate

Keywords

binary sequences; error correction codes; modulation coding; multi-access systems; redundancy; spread spectrum communication; BCM; DS/SSMA communication; Euclidean distance; biorthogonal sequences; block coded modulation; code rate; coding gains; direct-sequence spread-spectrum communication; redundancy; signature sequences; Bandwidth; Constellation diagram; Convolutional codes; Data communication; Delay; Euclidean distance; Interference; Modulation coding; Redundancy; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944604

Filename

944604