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Convergence of Iterative Water-Filling With Quantized Feedback: A Sufficient Condition

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2 Author(s)
Gohary, R.H. ; Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, ON, Canada ; Yanikomeroglu, H.

In this paper, the iterative water-filling (IWF) algorithm is considered when the noise-plus-interference levels fed back from the receivers are quantized. A sufficient condition for this algorithm to have a unique Nash equilibrium is derived. This condition is shown to approach the corresponding condition for standard IWF when the quantization resolution or the transmission power are sufficiently high.

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Signal Processing, IEEE Transactions on  (Volume:60 ,  Issue: 5 )