Noncoherent Unitary Space-Time Modulated DSSS Systems in Multipath Channels
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- Title
- Noncoherent Unitary Space-Time Modulated DSSS Systems in Multipath Channels
- Authors
- Cheun, K; Jeongchang Kim; Kim, Y; Soongyoon Choi
- Date Issued
- 2012-04
- Publisher
- JCN
- 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
- Direct-sequence spread-spectrum (DSSS); noncoherent; transmit diversity; unitary space-time modulation; TRANSMIT DIVERSITY; FADING CHANNELS; BLOCK-CODES; PERFORMANCE; CONSTELLATIONS; COMMUNICATION; SEQUENCES; SCHEME
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16380
- DOI
- 10.1109/JCN.2012.6253070
- ISSN
- 1229-2370
- Article Type
- Article
- Citation
- JOURNAL OF COMMUNICATIONS AND NETWORKS, vol. 14, no. 2, page. 206 - 212, 2012-04
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