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A DC offset compensated variable rate variable power (VRVP) adaptive modulation (AM) MIMO system with perfect channel state information is introduced. By this approach, BER degradation of AM MIMO due to DC offset is removed considerably. This technique provides a good trade-off between BER and average spectral efficiency (ASE) and increases the robustness of the system relative to DC offset.
The effect of DC offset on multi-input multi-output (MIMO) direct transceivers with adaptive modulation (AM) is discussed in this paper. A variable-rate variable-power (VRVP) AM system with perfect channel state information (P-CSI) at both the transmitter and receiver in a MIMO scenario is considered. The DC offset is modeled as a zero mean complex Gaussian distributed random variable. By this modeling...
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