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Physical transceiver implementations for multiple-input multiple-output(MIMO) wireless communication systems suffer from transmit-RF (Tx-RF)impairments. In this paper, we study the effect on channel capacity anderror-rate performance of residual Tx-RF impairments that defy propercompensation. In particular, we demonstrate that such residual distortionsseverely degrade the performance of (near-)optimum MIMO detection algorithms.To mitigate this performance loss, we propose an efficient algorithm, which isbased on an i.i.d. Gaussian model for the distortion caused by theseimpairments. In order to validate this model, we provide measurement resultsbased on a 4-stream Tx-RF chain implementation for MIMO orthogonalfrequency-division multiplexing (OFDM).

MIMO Transmission with Residual Transmit-RF Impairments