E-resources
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Yi Lu; Wei Zhang
2013 Computing, Communications and IT Applications Conference (ComComAp), 2013-AprilConference Proceeding
In this paper, we study a water-filling power allocation scheme in large M × N MIMO systems over flat Rayleigh fading channels. It is shown that when M = N with sufficiently large M, the channel capacity of the water-filling scheme almost converges to a constant regardless of channel randomness. Moreover, it is proved that for the water-filling scheme, the required channel information at the transmitter in large MIMO systems can be greatly reduced without capacity loss. When M ≫ N or M ≪ N, it is shown that allocating equal power on each eigenchannel is almost as optimal as water-filling power allocation scheme in channel capacity.
