SPACE-TIME UMTS-FDD RECEIVER WITH WEIGHTED INTERFERENCE CANCELLATION (TueAmPO2)

Author(s) : Joachim Wehinger (ftw. Forschungszentrum Telekommunikation Wien, Austria) Christoph Mecklenbräuker (ftw. Forschungszentrum Telekommunikation Wien, Austria)

Abstract : This contribution investigates a space-time multiuser receiver with weighted non-linear parallel interference cancellation for the uplink of UMTS FDD mode. More specifically, we tailor a receiver concept originally proposed by Divsalar et al. to the uplink of UMTS FDD and extend the concept to space-time processing. This receiver consists of several concatenated identical processing stages. The concept turns out to be well-suited for the uplink which employs longcode CDMA. Our simulations show that this receiver offers a graceful trade-off between computational complexity (expressed in the number of stages) and bit error rate in UMTS. With pilot-based channel estimation, four receive antenna elements, and two receiver stages we obtain an uncoded bit error rate of 4 percent at an Eb/No of 4 dB.

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