Rate optimal limited feedback policies for the MIMO downlink

Hazer Inaltekin; Tharaka Samarasinghe; Jamie S. Evans

doi:10.1109/WIOPT.2011.5930030

Rate optimal limited feedback policies for the MIMO downlink

Hazer Inaltekin^*, Tharaka Samarasinghe, Jamie S. Evans

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

This paper introduces and solves the sum rate maximization problem at the multiple-input multiple-output (MIMO) downlink as a function optimization problem subject to feedback constraints at the uplink. It is first shown that this optimization problem can be reduced to a finite dimensional non-convex optimization problem. Then, the resulting problem can be solved by investigating Schur-concavity of the aggregate communication rate across multiple traffic flows. Necessary and sufficient conditions for the rate optimality of homogenous threshold feedback policies are established. With some surprise, it is shown that homogenous thresholding is not always rate-wise optimal even if mobile users experience the same channel conditions statistically. Applications of these results are illustrated for Rayleigh fading channels.

Original language	English
Title of host publication	2011 International Symposium of Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	294-299
Number of pages	6
ISBN (Electronic)	9781612848242, 9781612848235
ISBN (Print)	9781612848228
DOIs	https://doi.org/10.1109/WIOPT.2011.5930030
Publication status	Published - 2011
Externally published	Yes
Event	2011 International Symposium of on Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks, WiOpt 2011 - Princeton, NJ, United States Duration: 9 May 2011 → 13 May 2011

Conference

Conference	2011 International Symposium of on Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks, WiOpt 2011
Country/Territory	United States
City	Princeton, NJ
Period	9/05/11 → 13/05/11

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10.1109/WIOPT.2011.5930030

Cite this

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title = "Rate optimal limited feedback policies for the MIMO downlink",

abstract = "This paper introduces and solves the sum rate maximization problem at the multiple-input multiple-output (MIMO) downlink as a function optimization problem subject to feedback constraints at the uplink. It is first shown that this optimization problem can be reduced to a finite dimensional non-convex optimization problem. Then, the resulting problem can be solved by investigating Schur-concavity of the aggregate communication rate across multiple traffic flows. Necessary and sufficient conditions for the rate optimality of homogenous threshold feedback policies are established. With some surprise, it is shown that homogenous thresholding is not always rate-wise optimal even if mobile users experience the same channel conditions statistically. Applications of these results are illustrated for Rayleigh fading channels.",

author = "Hazer Inaltekin and Tharaka Samarasinghe and Evans, {Jamie S.}",

year = "2011",

doi = "10.1109/WIOPT.2011.5930030",

language = "English",

isbn = "9781612848228",

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booktitle = "2011 International Symposium of Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "2011 International Symposium of on Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks, WiOpt 2011 ; Conference date: 09-05-2011 Through 13-05-2011",

}

Inaltekin, H, Samarasinghe, T & Evans, JS 2011, Rate optimal limited feedback policies for the MIMO downlink. in 2011 International Symposium of Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 294-299, 2011 International Symposium of on Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks, WiOpt 2011, Princeton, NJ, United States, 9/05/11. https://doi.org/10.1109/WIOPT.2011.5930030

Rate optimal limited feedback policies for the MIMO downlink. / Inaltekin, Hazer; Samarasinghe, Tharaka; Evans, Jamie S.
2011 International Symposium of Modeling and Optimization of Mobile, Ad Hoc, and Wireless Networks. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2011. p. 294-299.

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

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AU - Samarasinghe, Tharaka

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N2 - This paper introduces and solves the sum rate maximization problem at the multiple-input multiple-output (MIMO) downlink as a function optimization problem subject to feedback constraints at the uplink. It is first shown that this optimization problem can be reduced to a finite dimensional non-convex optimization problem. Then, the resulting problem can be solved by investigating Schur-concavity of the aggregate communication rate across multiple traffic flows. Necessary and sufficient conditions for the rate optimality of homogenous threshold feedback policies are established. With some surprise, it is shown that homogenous thresholding is not always rate-wise optimal even if mobile users experience the same channel conditions statistically. Applications of these results are illustrated for Rayleigh fading channels.

AB - This paper introduces and solves the sum rate maximization problem at the multiple-input multiple-output (MIMO) downlink as a function optimization problem subject to feedback constraints at the uplink. It is first shown that this optimization problem can be reduced to a finite dimensional non-convex optimization problem. Then, the resulting problem can be solved by investigating Schur-concavity of the aggregate communication rate across multiple traffic flows. Necessary and sufficient conditions for the rate optimality of homogenous threshold feedback policies are established. With some surprise, it is shown that homogenous thresholding is not always rate-wise optimal even if mobile users experience the same channel conditions statistically. Applications of these results are illustrated for Rayleigh fading channels.

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PB - Institute of Electrical and Electronics Engineers (IEEE)

CY - Piscataway, NJ

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Y2 - 9 May 2011 through 13 May 2011

ER -

Rate optimal limited feedback policies for the MIMO downlink

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