Sum-rate capacity of random beamforming for multi-antenna broadcast channels with other cell interference

Sung Hyun Moon; Sang Rim Lee; Inkyu Lee

doi:10.1109/TWC.2011.070711.102145

Sum-rate capacity of random beamforming for multi-antenna broadcast channels with other cell interference

Sung Hyun Moon, Sang Rim Lee, Inkyu Lee

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

In this letter, we analyze the sum rate of random beamforming (RBF) for downlink multi-antenna systems in the presence of other cell interference (OCI). Employing extreme value theory, an expression of the asymptotic ergodic sum rate with a large number of users is derived from the limiting distribution of the sample maximum of the received signal-to-interference-plus-noise ratio. Based on our result, the scaling law of multiuser diversity gain is also exhibited in the context of RBF systems with the OCI, which is shown to coincide with the previous result without the other cell interferers. Simulation results verify the validity of our analysis even with not so large number of users.

Original language	English
Article number	5958562
Pages (from-to)	2440-2444
Number of pages	5
Journal	IEEE Transactions on Wireless Communications
Volume	10
Issue number	8
DOIs	https://doi.org/10.1109/TWC.2011.070711.102145
Publication status	Published - 2011 Aug

Keywords

MIMO broadcast channel
multiuser scheduling
other-cell interference
random beamforming

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/TWC.2011.070711.102145

Cite this

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title = "Sum-rate capacity of random beamforming for multi-antenna broadcast channels with other cell interference",

abstract = "In this letter, we analyze the sum rate of random beamforming (RBF) for downlink multi-antenna systems in the presence of other cell interference (OCI). Employing extreme value theory, an expression of the asymptotic ergodic sum rate with a large number of users is derived from the limiting distribution of the sample maximum of the received signal-to-interference-plus-noise ratio. Based on our result, the scaling law of multiuser diversity gain is also exhibited in the context of RBF systems with the OCI, which is shown to coincide with the previous result without the other cell interferers. Simulation results verify the validity of our analysis even with not so large number of users.",

keywords = "MIMO broadcast channel, multiuser scheduling, other-cell interference, random beamforming",

author = "Moon, {Sung Hyun} and Lee, {Sang Rim} and Inkyu Lee",

note = "Funding Information: Manuscript received November 30, 2010; revised February 10, 2011; accepted June 3, 2011. The associate editor coordinating the review of this letter and approving it for publication was H. Jafarkhani. The authors are with the School of Electrical Engineering, Korea University, Seoul, Korea, 1, 5-Ga, Anam-Dong, Seongbuk-Gu, Seoul 136-713, Korea (e-mail: {shmoon, sangrim78, inkyu}@korea.ac.kr). This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2010-0017909), and in part by Seoul R&BD Program(WR080951). This paper was presented in part at the IEEE International Conference on Communications (ICC) in Budapest, Hungary, May 2011. Digital Object Identifier 10.1109/TWC.2011.070711.102145",

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AB - In this letter, we analyze the sum rate of random beamforming (RBF) for downlink multi-antenna systems in the presence of other cell interference (OCI). Employing extreme value theory, an expression of the asymptotic ergodic sum rate with a large number of users is derived from the limiting distribution of the sample maximum of the received signal-to-interference-plus-noise ratio. Based on our result, the scaling law of multiuser diversity gain is also exhibited in the context of RBF systems with the OCI, which is shown to coincide with the previous result without the other cell interferers. Simulation results verify the validity of our analysis even with not so large number of users.

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Sum-rate capacity of random beamforming for multi-antenna broadcast channels with other cell interference

Abstract

Keywords

ASJC Scopus subject areas

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