Noncoherent Unitary Space-Time Modulated DSSS Systems in Multipath Channels

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....

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Bibliographic Details
Published in:Journal of communications and networks 2012, Vol.14 (2), p.206-212
Main Authors: Cheun, Kyung-Whoon, Kim, Jeong-Chang, Kim, You-Han, Choi, Soong-Yoon
Format: Article
Language:Korean
Online Access:Get full text
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Summary: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.
ISSN:1229-2370
1976-5541