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2011
IEEE

Distributed Quantization of Order Statistics with Applications to CSI Feedback

7 years 10 months ago
Distributed Quantization of Order Statistics with Applications to CSI Feedback
Feedback of channel state information (CSI) in wireless systems is essential in order to exploit multi-user diversity and achieve the highest possible performace. When each spatially distributed user in the wireless system is assumed to have i.i.d. scalar CSI values, the optimal fixed-rate and entropy-constrained point density functions are established in the high-resolution regime for the quantization of the CSI feedback to a centralized scheduler under the mean square error (MSE) criterion. The spatially distributed nature of the users leads to a distributed functional scalar quantization approach for the optimal high resolution point densities of the CSI feedback. Under a mild absolute moment criterion, it is shown that with a greedy scheduling algorithm at the centralized scheduler, the optimal fixed-rate point density for each user corresponds to a point density associated with the maximal order statistic distribution. This result is generalized to monotonic functions of arbitr...
Matthew Pugh, Bhaskar D. Rao
Added 14 May 2011
Updated 14 May 2011
Type Journal
Year 2011
Where DCC
Authors Matthew Pugh, Bhaskar D. Rao
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