A Constrained Adaptive Space-Time Interference Canceller for Multiuser WCDMA Sytems 


Vol. 27,  No. 4, pp. 298-307, Apr.  2002


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  Abstract

This paper concentrates on developing and analyzing an advanced space-time multiuser receiver for WCDMA forward link. Through exploring the interference caused by co-channel users and delayed multipaths in CDMA, a constrained linear adaptive filter is adopted to cancel the interference. Furthermore, by utilizing the space-time diversity, an optimum diversity receiver, called a constrained adaptive space-time interference canceller (C-ASTIC), is proposed. For comparison, the statistical analysis of multiuser performance for WCDMA system with space-time diversity is described. The result of the simulation showed that C-ASTIC performs better than both the space-time diversity combining maximal ratio combiner (MRC) and the single-antenna adaptive interference canceller in a multipath fading channel. Also, the efficiency of the C-ASTIC in the multimedia communication environment is investigated under the multiuser, multi-transmit antenna, and multirate WCDMA system in a multipath fading channel. From the results, the C-ASTIC was validated to be useful for multi-rate WCDMA system through improving the performance gain by more than 3 dB at BER of 103 in a half or more loaded system.

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  Cite this article

[IEEE Style]

H. Yang, S. Ro, D. Hong, C. Kang, "A Constrained Adaptive Space-Time Interference Canceller for Multiuser WCDMA Sytems," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 4, pp. 298-307, 2002. DOI: .

[ACM Style]

Ha-young Yang, Sang-min Ro, Dae-sik Hong, and Chane-eon Kang. 2002. A Constrained Adaptive Space-Time Interference Canceller for Multiuser WCDMA Sytems. The Journal of Korean Institute of Communications and Information Sciences, 27, 4, (2002), 298-307. DOI: .

[KICS Style]

Ha-young Yang, Sang-min Ro, Dae-sik Hong, Chane-eon Kang, "A Constrained Adaptive Space-Time Interference Canceller for Multiuser WCDMA Sytems," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 4, pp. 298-307, 4. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880