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A Refined Convergence Condition for Iterative Waterfilling Algorithm
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DOI：10.1109/LCOMM.2013.121813.132226.png)
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In a multi-user spectrum optimization problem, iterative waterfilling is normally used as a distributed power allocation algorithm. In this letter, we derive a new sufficient condition for its convergence, which is more relaxed than previous conditions. Our result strengthens the fact that the convergence of iterative waterfilling is dependent on signal-to-noise ratio (SNR), and that convergence is much easier in the low SNR regime.
Keyword:
Frequency selective
Gaussian interference channel
iterative waterfilling
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