A new low-complexity beamformer-RAKE receiver for WCDMA

We demonstrate the performance of a beamformer-RAKE receiver at the uplink of a wideband code division multiple access (WCDMA) system. The receiver employs maximum signal to interference and noise ratio (MSINR) criterion to form its beams in the spatial domain. We propose a new iterative algorithm to solve the generalized eigenvalue problem (GE) resulting from the MSINR beamforming criterion. This algorithm, termed adaptive matrix inversion (AMI), has linear computational complexity with the number of antenna elements. We show the performance gain compared to that of another proposed method.

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