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Waterfilling Power Allocation at High SNR Regimes

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1 Author(s)
Hichan Moon ; Dept. of Electron. Eng., Hanyang Univ., Seoul, South Korea

In this letter, for general fading distributions, it is rigorously shown that the water-filling power allocation function converges pointwise to the function which allocates fixed power to all non-zero channel gain states, as SNR approaches infinity. The convergence speed of the water-filling power allocation is also investigated.

Published in:

Communications, IEEE Transactions on  (Volume:59 ,  Issue: 3 )