Noncoherent unitary space-time modulated DSSS systems in multipath channels

Author

Cheun, Kyungwhoon ; Kim, Jeongchang ; Kim, Youhan ; Choi, Soongyoon

Author_Institution

Div. of Inf. Technol. Convergence Eng., POSTECH, Pohang, South Korea

Volume

14

Issue

2

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

206

Lastpage

212

Abstract

In this paper, in order to effectively apply unitary space-time modulation to the direct-sequence spread-spectrum multiple-access (DSSS-MA) networks, we propose a low-rate, noncoherent, unitary, and space-time modulated DSSS system supporting any number of transmit antennas based on Walsh matrices. The proposed scheme simultaneously performs bandwidth spreading and space-time coding and outperforms those using high-rate, conventional unitary space-time constellations. Furthermore, the proposed scheme allows for a simple detector structure based on fast Walsh transforms.

Keywords

multi-access systems; space-time codes; spread spectrum communication; transmitting antennas; DSSS systems; DSSS-MA; Walsh matrices; Walsh transforms; direct-sequence spread-spectrum multiple-access networks; multipath channels; noncoherent unitary space-time modulated; space-time coding; space-time constellations; space-time modulated DSSS system; space-time modulation; transmit antennas; Bandwidth; Bit error rate; Detectors; Receiving antennas; Spread spectrum communication; Transmitting antennas; Direct-sequence spread-spectrum (DSSS); noncoherent; transmit diversity; unitary space-time modulation;

fLanguage

English

Journal_Title

Communications and Networks, Journal of

Publisher

ieee

ISSN

1229-2370

Type

jour

DOI

10.1109/JCN.2012.6253070

Filename

6253070