IQ Imbalances Effects on the Performance of Combining Schemes in MIMO-OFDM Wireless Communications
نویسنده
چکیده
Orthogonal frequency division multiplexing (OFDM) is a modulation scheme widely used in high speed communications. Since multi-input multi-output (MIMO) antennas can increase the reliability of the data communications, the combination of these two techniques called MIMO-OFDM is a good suggestion for reliable high speed communications. However, these systems suffer from in-phase and quadrature-phase (IQ) imbalances. This paper focuses on the performance degradation caused by the IQ imbalances by comparison of different combination schemes in the presence of IQ imbalances. The improvement caused by increasing the number of receiver antennas in different combining schemes is also considered.
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