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Energy-Efficient Adaptive Virtual MIMO Transmission in a Transmit-Side Correlated Wireless Sensor Network
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- Authors
- Jaehyun PARK, Byung Jang JEONG
- Issue Date
- 2013-04
- Citation
- IEICE Transactions on Communications, v.E96.B, no.4, pp.976-985
- ISSN
- 0916-8516
- Publisher
- 일본, 전자정보통신학회 (IEICE)
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, performances of two different virtual multiple-input multiple-output (MIMO) transmission schemes-spatial multiplexing (SM) and space-time block coding (STBC)-in a correlated wireless sensor network are analyzed. By utilizing a complex Wishart distribution, we investigate the statistical properties of a correlated virtual MIMO channel between the sensors and data collector that is used in the performance analysis of each MIMO transmission mode. Distributed sensors then transmit their data cooperatively to the data collector by choosing a proper transmission mode adaptively based on the channel conditions and spatial correlation among the sensors. Furthermore, after analyzing the energy efficiencies of SM and STBC, we propose a new energy efficient mode switching rule between SM and STBC. Finally, by analytically deriving the required transmit energy of the proposed adaptive transmission scheme, the manner in which the spatial correlation influences the energy consumption is shown. This suggests a cooperating node scheduling protocol that makes energy consumption less sensitive to the variation of the spatial correlation. Copyright © 2013 The Institute of Electronics, Information and Communication Engineers.
- KSP Keywords
- Adaptive Transmission, Data Collector, Distributed sensor, Information and communication, MIMO channel, MIMO transmission, Multiple input multiple output(MIMO), New Energy, Node Scheduling, Performance analysis, Space time(ST)