Zero-forcing precoding: Difference between revisions

Revision as of 03:19, 16 August 2016

Revision as of 10:12, 26 April 2017

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Quantify the amount of the feedback resource required to maintain at least a given throughput performance gap between zero-forcing with perfect feedback and with limited feedback, i.e.,

:<math>\Delta R = R_{ZF} - R_{FB} \leq \log_2 g</math> .

Jindal showed that the required feedback bits of a [[Spatial Correlation|spatially uncorrelated]] channel should be scaled according to SNR of the downlink channel, which is given by:<ref name="Jindal_ZF"/>