Flexible radio: a framework for optimized multimodal operation via dynamic signal design
EURASIP Journal on Wireless Communications and Networking
A MIMO-OFDM testbed for wireless local area networks
EURASIP Journal on Applied Signal Processing
Power allocation for block-fading channels with arbitrary input constellations
IEEE Transactions on Wireless Communications
Outage exponents of block-fading channels with power allocation
IEEE Transactions on Information Theory
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This paper investigates the performance of narrowband, slowly fading, and delay-limited multiple-antenna systems where channel state information (CSI) is available at the transmission end. This situation can arise in time-division duplex (TDD) based two-way systems where channel state estimation can be performed using the signal received from the opposite link. Power control methods which attempt to keep the transmission rate constant at the expense of randomizing the transmit power are considered. It is shown that significant savings in average transmit power (sometimes on the order of tens of decibels) can be expected compared to systems which keep the total transmit power constant. Several practical channel coding examples using are illustrated and their bit and frame error rate performance are discussed.