Effects of mutual coupling and amplitude/phase mismatch on a WCDMA downlink receiver with multiple antennas

Fabbryccio A. C. M. Cardoso; Marcelo A. C. Fernandes; José G. Chiquito; Dalton S. Arantes

doi:10.14209/sbrt.2004.336

Effects of mutual coupling and amplitude/phase mismatch on a WCDMA downlink receiver with multiple antennas

Fabbryccio A. C. M. Cardoso, Marcelo A. C. Fernandes, José G. Chiquito, Dalton S. Arantes

DOI: 10.14209/sbrt.2004.336

Evento: XXI Simpósio Brasileiro de Telecomunicações (SBrT2004)

Keywords: Antenna coupling antenna array wcdma downlink

Abstract

In this paper we study the effects of mutual coupling and amplitude/phase mismatch on a WCDMA downlink receiver using multiple antennas in the user terminal. Analytical expressions are obtained for the Zero-Forcing and for the Minimum Mean-Square Error receiver, in which the implicit effects of the mutual couplig and amplitude/phase mismatch matrices are taken into account. Simulation results for a time-variant COST 259 channel model, using an adaptive LMS receiver, show that these non-ideal behaviors in a co-linear array have negligible effects on performance when the antenna spacing is λ/2. For λ/4 spacing there is a loss in receiver performance for low values of signal-to-noise ratios.

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