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Cloud radios with limited feedback

Authors: Kiran Kuchi; Maaz M. Mohiuddin; T. V. Sreejith; Rijul Bansal; G. V. V. Sharma; Shahriar Emami;

Cloud radios with limited feedback

Abstract

Cooperation in a cellular network is seen as a key technique in managing other cell interference to observe a gain in achievable rate. In this paper, we present the achievable rates for a cloud radio network using a zero forcing (ZF) equalizer with dirty paper precoding (DPC). We show that when complete channel state information is available at the cloud, rates close to those achievable with total interference cancellation can be achieved. With mean capacity gains, of up to 200% over the conventional cellular network in the downlink, this precoding scheme shows great promise for implementation in a cloud radio network. To simplify the analysis, we use a stochastic geometric framework based on Poisson point processes instead of the traditional grid based cellular network model. We study the impact of limiting the channel state information on the achievable rate. Bounds are developed on the achievable rate with limited feedback. These bounds are shown to be tight while permitting analytical tractability. Specifically, we show that with a limited feedback of about 5-6 channel states from each user, we obtain significant gain compared to conventional systems.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
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