DC compensated adaptive modulation in MIMO systems

Authors:
M. Keshavarzi;H. Hemesi;A. Mohammadi;A. Abdipour
Affiliations:
Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran;Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran;Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran;Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2010

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How accurate channel prediction needs to be for transmit-beamforming with adaptive modulation over Rayleigh MIMO channels?

IEEE Transactions on Wireless Communications

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Abstract

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.