Achievable throughput of MIMO downlink beamforming with limited channel information

Giuseppe Caire, Nihar Jindal, Mari Kobayashi, Niranjay Ravindran

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations

Abstract

We consider a MIMO fading broadcast channel and study the achievable throughput of zero-forcing downlink beamforming when the channel state information (CSI) available to the transmitter and/or receivers is imperfect. Each receiver (mobile) acquires imperfect CSI via downlink training pilots, and the transmitter acquires CSI through explicit feedback from each mobile. We analyze both analog and digital (i.e., quantized) channel feedback techniques. Our analysis quantifies the throughput degradation due to limited training, limited feed-back resources (measured in feedback channel symbols rather than bits), and errors on the feedback channel. Using these results we are able to quantify scenarios in which digital feedback outperforms analog and also provide guidelines for the optimal allocation of resources to training and channel feedback.

Original languageEnglish
Title of host publication18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
DOIs
StatePublished - 2007
Externally publishedYes
Event18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07 - Athens, Greece
Duration: 3 Sep 20077 Sep 2007

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Conference

Conference18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
Country/TerritoryGreece
CityAthens
Period3/09/077/09/07

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