A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks

Jeonghun Park; Jeffrey G. Andrews; Robert W. Heath; Namyoon Lee

doi:10.1109/ISIT.2016.7541569

A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks

Jeonghun Park, Jeffrey G. Andrews, Robert W. Heath, Namyoon Lee

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We consider a multi-antenna downlink cellular network using either single-user maximal ratio transmission (MRT) or multi-user zero-forcing (ZF) transmission. The locations of the base stations are modeled by a Poisson point process to allow the inter-cell interference to be tractably analyzed. A tight lower bound on the optimum number of feedback bits maximizing the net spectral efficiency is derived, whereby the cost of feedback sent via uplink is subtracted from the corresponding gain in downlink spectral efficiency. When using MRT, the optimum number of feedback bits is shown to scale linearly with the number of antennas, and logarithmically with the channel coherence time. With ZF, the optimum amount of feedback scales the same as with MRT, but additionally also increases linearly with the pathloss exponent.

Original language	English
Title of host publication	Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1601-1605
Number of pages	5
ISBN (Electronic)	9781509018062
DOIs	https://doi.org/10.1109/ISIT.2016.7541569
Publication status	Published - 2016 Aug 10
Event	2016 IEEE International Symposium on Information Theory, ISIT 2016 - Barcelona, Spain Duration: 2016 Jul 10 → 2016 Jul 15

Publication series

Name	IEEE International Symposium on Information Theory - Proceedings
Volume	2016-August
ISSN (Print)	2157-8095

Other

Other	2016 IEEE International Symposium on Information Theory, ISIT 2016
Country/Territory	Spain
City	Barcelona
Period	16/7/10 → 16/7/15

Bibliographical note

Funding Information:
This research is supported in part by a gift from Huawei Technologies Co. Ltd. and the National Science Foundation under Grant No. NSF-CCF-1514275 The research was supported in part by the MSIP (Ministry of Science, ICT and Future Planning), Korea, under the ICT RandD program (IITP-2016-B0717-16-0002) supervised by the IITP(Institute for Information and communications Technology Promotion)

Publisher Copyright:
© 2016 IEEE.

All Science Journal Classification (ASJC) codes

Theoretical Computer Science
Information Systems
Modelling and Simulation
Applied Mathematics

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10.1109/ISIT.2016.7541569

Cite this

Park, J., Andrews, J. G., Heath, R. W., & Lee, N. (2016). A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks. In Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory (pp. 1601-1605). [7541569] (IEEE International Symposium on Information Theory - Proceedings; Vol. 2016-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISIT.2016.7541569

Park, Jeonghun ; Andrews, Jeffrey G. ; Heath, Robert W. et al. / A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks. Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory. Institute of Electrical and Electronics Engineers Inc., 2016. pp. 1601-1605 (IEEE International Symposium on Information Theory - Proceedings).

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abstract = "We consider a multi-antenna downlink cellular network using either single-user maximal ratio transmission (MRT) or multi-user zero-forcing (ZF) transmission. The locations of the base stations are modeled by a Poisson point process to allow the inter-cell interference to be tractably analyzed. A tight lower bound on the optimum number of feedback bits maximizing the net spectral efficiency is derived, whereby the cost of feedback sent via uplink is subtracted from the corresponding gain in downlink spectral efficiency. When using MRT, the optimum number of feedback bits is shown to scale linearly with the number of antennas, and logarithmically with the channel coherence time. With ZF, the optimum amount of feedback scales the same as with MRT, but additionally also increases linearly with the pathloss exponent.",

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Park, J, Andrews, JG, Heath, RW & Lee, N 2016, A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks. in Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory., 7541569, IEEE International Symposium on Information Theory - Proceedings, vol. 2016-August, Institute of Electrical and Electronics Engineers Inc., pp. 1601-1605, 2016 IEEE International Symposium on Information Theory, ISIT 2016, Barcelona, Spain, 16/7/10. https://doi.org/10.1109/ISIT.2016.7541569

A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks. / Park, Jeonghun; Andrews, Jeffrey G.; Heath, Robert W. et al.

Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory. Institute of Electrical and Electronics Engineers Inc., 2016. p. 1601-1605 7541569 (IEEE International Symposium on Information Theory - Proceedings; Vol. 2016-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - We consider a multi-antenna downlink cellular network using either single-user maximal ratio transmission (MRT) or multi-user zero-forcing (ZF) transmission. The locations of the base stations are modeled by a Poisson point process to allow the inter-cell interference to be tractably analyzed. A tight lower bound on the optimum number of feedback bits maximizing the net spectral efficiency is derived, whereby the cost of feedback sent via uplink is subtracted from the corresponding gain in downlink spectral efficiency. When using MRT, the optimum number of feedback bits is shown to scale linearly with the number of antennas, and logarithmically with the channel coherence time. With ZF, the optimum amount of feedback scales the same as with MRT, but additionally also increases linearly with the pathloss exponent.

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Park J, Andrews JG, Heath RW, Lee N. A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks. In Proceedings - ISIT 2016; 2016 IEEE International Symposium on Information Theory. Institute of Electrical and Electronics Engineers Inc. 2016. p. 1601-1605. 7541569. (IEEE International Symposium on Information Theory - Proceedings). doi: 10.1109/ISIT.2016.7541569

A lower bound on the optimum feedback rate for downlink multi-antenna cellular networks

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