Direct-detection synchronous O-CDMA system with interference estimation and cancellation
Cui, Kai, Leeson, Mark S. and Hines, Evor. (2010) Direct-detection synchronous O-CDMA system with interference estimation and cancellation. Photonic Network Communications, Vol.19 (No.3). pp. 277-283. ISSN 1387-974XFull text not available from this repository.
Official URL: http://dx.doi.org/10.1007/s11107-009-0232-8
An M-ary coded synchronous optical code-division multiple-access (O-CDMA) system with pulse-position modulation (PPM) is investigated. One novel class of optical spreading codes based on combinatorial designs is adopted in the multiplexing process. Their ideal correlation properties facilitate the discrimination between desired signals and jamming. However, the multiple-access interference (MAI) with high intensity significantly deteriorates the system performance even if the number of interferers is small. In this paper, we present an interference reduction technique for direct-detection O-CDMA to suppress the noise effect and increase the system capacity. The MAI from reference signals can be estimated by utilizing the uniform cross-correlation (CC) among its sequences and considerably cancelled out after the photodetection process. The upper bound on the error probability of optical synchronous PPM-CDMA is then derived. The proposed system is shown to be effective to improve the bit error performance and to alleviate the error floor when the number of simultaneous users and the received optical power are not appreciably small.
|Item Type:||Journal Article|
|Subjects:||Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||Faculty of Science > Engineering|
|Library of Congress Subject Headings (LCSH):||Code division multiple access, Pulse modulation (Electronics), Combinatorial designs and configurations, Synchronous data transmission systems, Optical fiber communication, Bit error rates, Electromagnetic interference|
|Journal or Publication Title:||Photonic Network Communications|
|Publisher:||Springer New York LLC|
|Official Date:||June 2010|
|Number of Pages:||7|
|Page Range:||pp. 277-283|
|Access rights to Published version:||Restricted or Subscription Access|
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