Transmit Diversity Scheme with Power Control for Wireless Communications (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)

概要

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In this paper, we present a new transmit diversity scheme with power control by using two transmit antennas in which the power control unit is added to adaptively suit the channel fading variation. Compared to the transmit diversity scheme (STD, one space time coding scheme) proposed by Alamouti and the traditional maximal ratio combining (MRC) diversity scheme employed at the receiver, simulation results indicate that the new scheme has considerable performance gain. We also discuss the effects of the imperfect channel parameter estimation on the performance of the system. Simulation results show that the new system is more robust to the estimation error of channel fading parameters than the STD. As the signal to noise ratio is relatively high, the diversity scheme with power control is more sensitive to the channel estimation error compared to the MRC. But when the channel estimation accuracy is rdatively high, the diversity scheme with power control still has better performance than the ideal MRC as the BER is about 1×10^<-3>.
社団法人電子情報通信学会の論文
2001-07-01