Blind adaptive multiuser detection for DS/SSMA communications with generalized random spreading
SCIE
SCOPUS
- Title
- Blind adaptive multiuser detection for DS/SSMA communications with generalized random spreading
- Authors
- Cho, JH; James S. Lehnert
- Date Issued
- 2001-06
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Abstract
- A new spreading scheme and an accompanying blind adaptive receiver structure are proposed for direct-sequence spread-spectrum multiple-access communications in a slowly-varying, frequency-selective fading channel. Each user's spreading sequence is given by the Kronecker product of a long-period pseudonoise (PN) sequence, which is accurately modeled by a random sequence, and a short-length deterministic signature code, This spreading scheme bridges the gap between pure PN spreading and pure short-code spreading schemes. Ht is shown that with this spreading scheme, the channel response to the desired signal component is easily estimated without relying on the spectral decomposition of the signal correlation matrix. With the estimate of the channel response, the receiver suppresses interference based on the maximum signal-to-interference ratio criterion. The blind adaptive receiver requires only coarse timing information and a priori knowledge of the desired user's PN sequence for adaptation. Numerical results show that the adaptive receiver significantly suppresses interference by successfully estimating the channel response and the interference statistics with a low computational complexity. An extension to spatio-temporal processing using an array antenna is also discussed.
- Keywords
- code-division multiple access; fading channels; interference suppression; modulation; spread-spectrum communications; INTERFERENCE SUPPRESSION; CHANNEL ESTIMATION; FADING CHANNELS; CDMA SYSTEMS; RECEIVERS; RADIO
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/25786
- ISSN
- 0090-6778
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 49, no. 6, page. 1082 - 1091, 2001-06
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- There are no files associated with this item.
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