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On the sum capacity of multiaccess block-fading channels with individual side information

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3 Author(s)
Deshpande, Y. ; Dept. of Electr. Eng., Indian Inst. of Technol. Bombay, Mumbai, India ; Pillai, S.R.B. ; Dey, B.K.

We consider the problem of finding optimal, fair and distributed power-rate strategies to achieve the sum capacity of the Gaussian multiple-access block-fading channel. The transmitters have access to only their own fading coefficients, while the receiver has access to all of the fading coefficients. We propose a distributed strategy called the `midpoint' strategy which is optimal when the system cannot tolerate outage. In addition, we demonstrate a successive decoding scheme that can achieve this maximal sum-rate. In presence of outage, we show that the strategies based on a single threshold are suboptimal.

Published in:

Information Theory Workshop (ITW), 2011 IEEE

Date of Conference:

16-20 Oct. 2011