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Blind Adaptive Multiuser Detection for Uplink Long-Code CDMA Systems

Overview In the uplink of a long-code CDMA system, base station knows spreading codes of all serviced users. Given propagation delays, a blind adaptive Constant Modulus Algorithm (CMA)-based approach, with the aid of a set of MMSE-like constraints parameterized by channel-like vectors, is proposed to detect all users' symbols simultaneously. As by-products, the channel-like vectors are also obtained for all users. Since the constraints involve covariance of the received data, which is time varying and can not be obtained by traditional sample average, this paper thus proposes to approximate it using estimated signature matrix and noise power.

Further White Paper Details
Publisher	Institute of Electrical and Electronics Engineers	File Format	PDF
Date Published	September 2003
Format	White Papers
Topics	Mobile - Wireless Communications, TDMA - CDMA

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