Large System Analysis of Zero-Forcing Precoding in MISO Broadcast Channels with Limited FeedbackReportar como inadecuado




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1 Eurecom Sophia Antipolis 2 SSEC - Chaire Sciences des Systèmes et Défis Energétiques EDF-ECP-Supélec 3 Chaire Radio Flexible - Chaire Radio Flexible Alcatel-Lucent-Supélec

Abstract : In this paper we analyze the sum rate of zero-forcing ZF precoding in MISO broadcast channels with limited feedback, transmit correlation and path loss. Our analysis assumes that the number of transmit antennas $M$ and the number of users $K$ are large, while their ratio remains bounded. By applying recent results from random matrix theory we derive a deterministic equivalent of the signal-to-interference plus noise ratio SINR and compute the sum rate maximizing number of users as well as the limiting sum rate for high signal-to-noise ratios SNR, as a function of the channel errors and the channel correlation pattern. Simulations show that theoretical and numerical results match well, even for small system dimensions.





Autor: Sebastian Wagner - Romain Couillet - Dirk Slock - Merouane Debbah -

Fuente: https://hal.archives-ouvertes.fr/



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