TY - GEN
T1 - Accurate approximations and asymptotic results for the sum-rate of random beamforming for multi-antenna gaussian broadcast channels
AU - Park, Ki Hong
AU - Ko, Young Chai
PY - 2009
Y1 - 2009
N2 - In this paper, we first present a new closed form approximation for the sum-rate of random beamforming. A generic curve fitting procedure is developed to make this approximation accurate for arbitrary signal-to-noise ratios (SNRs) and number of transmit antennas. Our analytical approach leads also to simple asymptotic formulas for high SNR or large number of antennas. Selected numerical results show that our proposed approximation leads to results that come very close to the exact sum-rate and that our asymptotic formulas converge to the exact values when the SNR or the number of antennas tend to high values.
AB - In this paper, we first present a new closed form approximation for the sum-rate of random beamforming. A generic curve fitting procedure is developed to make this approximation accurate for arbitrary signal-to-noise ratios (SNRs) and number of transmit antennas. Our analytical approach leads also to simple asymptotic formulas for high SNR or large number of antennas. Selected numerical results show that our proposed approximation leads to results that come very close to the exact sum-rate and that our asymptotic formulas converge to the exact values when the SNR or the number of antennas tend to high values.
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U2 - 10.1109/VETECS.2009.5073356
DO - 10.1109/VETECS.2009.5073356
M3 - Conference contribution
AN - SCOPUS:70349685231
SN - 9781424425174
T3 - IEEE Vehicular Technology Conference
BT - VTC Spring 2009 - IEEE 69th Vehicular Technology Conference
T2 - VTC Spring 2009 - IEEE 69th Vehicular Technology Conference
Y2 - 26 April 2009 through 29 April 2009
ER -