Non-uniform directional dictionary-based limited feedback for massive MIMO systems

Panos N. Alevizos, Xiao Fu, Nicholas Sidiropoulos, Ye Yang, Aggelos Bletsas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

This work proposes a new limited feedback channel estimation framework. The proposed approach exploits a sparse representation of the double directional wireless channel model involving an over complete dictionary that accounts for the antenna directivity patterns at both base station (BS) and user equipment (UE). Under this sparse representation, a computationally efficient limited feedback algorithm that is based on single-bit compressive sensing is proposed to effectively estimate the downlink channel. The algorithm is lightweight in terms of computation, and suitable for real-time implementation in practical systems. More importantly, under our design, using a small number of feedback bits, very satisfactory channel estimation accuracy is achieved even when the number of BS antennas is very large, which makes the proposed scheme ideal for massive MIMO 5G cellular networks. Judiciously designed simulations reveal that the proposed algorithm outperforms a number of popular feedback schemes in terms of beam forming gain for subsequent downlink transmission, and reduces feedback overhead substantially when the BS has a large number of antennas.

Original languageEnglish (US)
Title of host publication2017 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9783901882906
DOIs
StatePublished - Jun 27 2017
Event15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2017 - Paris, France
Duration: May 15 2017May 19 2017

Other

Other15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2017
CountryFrance
CityParis
Period5/15/175/19/17

Fingerprint Dive into the research topics of 'Non-uniform directional dictionary-based limited feedback for massive MIMO systems'. Together they form a unique fingerprint.

Cite this