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CORR
2007
Springer

On the Information Rate of MIMO Systems with Finite Rate Channel State Feedback and Power On/Off Strategy

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On the Information Rate of MIMO Systems with Finite Rate Channel State Feedback and Power On/Off Strategy
— This paper quantifies the information rate of multiple-input multiple-output (MIMO) systems with finite rate channel state feedback and power on/off strategy. In power on/off strategy, a beamforming vector (beam) is either turned on (denoted by on-beam) with a constant power or turned off. We prove that the ratio of the optimal number of on-beams and the number of antennas converges to a constant for a given signal-to-noise ratio (SNR) when the number of transmit and receive antennas approaches infinity simultaneously and when beamforming is perfect. Based on this result, a near optimal strategy, i.e., power on/off strategy with a constant number of on-beams, is discussed. For such a strategy, we propose the power efficiency factor to quantify the effect of imperfect beamforming. A formula is proposed to compute the maximum power efficiency factor achievable given a feedback rate. The information rate of the overall MIMO system can be approximated by combining the asymptotic r...
Wei Dai, Youjian Liu, Brian Rider, Vincent K. N. L
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2007
Where CORR
Authors Wei Dai, Youjian Liu, Brian Rider, Vincent K. N. Lau
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