Bi-directional use of spatial resources and effects of spatial correlation

Hyungsik Ju; Xiaohu Shang; H. Vincent Poor; Daesik Hong

doi:10.1109/TWC.2011.081011.101955

Bi-directional use of spatial resources and effects of spatial correlation

Hyungsik Ju, Xiaohu Shang, H. Vincent Poor, Daesik Hong

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

23 Scopus citations

Abstract

In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.

Original language	English (US)
Article number	5995303
Pages (from-to)	3368-3379
Number of pages	12
Journal	IEEE Transactions on Wireless Communications
Volume	10
Issue number	10
DOIs	https://doi.org/10.1109/TWC.2011.081011.101955
State	Published - Oct 2011

All Science Journal Classification (ASJC) codes

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Keywords

Multiple antennas
achievable rate
fading correlation
two-way communication

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10.1109/TWC.2011.081011.101955

Cite this

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title = "Bi-directional use of spatial resources and effects of spatial correlation",

abstract = "In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.",

keywords = "Multiple antennas, achievable rate, fading correlation, two-way communication",

author = "Hyungsik Ju and Xiaohu Shang and Poor, {H. Vincent} and Daesik Hong",

note = "Funding Information: This work was supported in part by the Yonsei University TMS Center, a Korean Government funded Brain Korea 21 project and in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-0018938). This research was also supported in part by the MKE (The Ministry of Knowledge Economy), Korea, under the ITRC (Information Technology Research Center) support program supervised by the NIPA (National IT Industry Promotion Agency)” (NIPA-2011-(C1090-1111-0005)) and in part by the U. S. National Science Foundation under Grant CNS-09-05398.",

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doi = "10.1109/TWC.2011.081011.101955",

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AU - Hong, Daesik

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AB - In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.

KW - Multiple antennas

KW - achievable rate

KW - fading correlation

KW - two-way communication

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Bi-directional use of spatial resources and effects of spatial correlation

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All Science Journal Classification (ASJC) codes

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