V-BLAST-based virtual MIMO for distributed wireless sensor networks
Jayaweera, Sudharman K.
Jayaweera, Sudharman K.
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2007-10-31
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Article
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Keywords
Cooperative Multiple Input Multiple Output (mimo),Mimo,Vertical Bell Laboratories Layered Space-time (v-blast),Virtual Mimo,Wireless Sensor Networks (wsns),Data Communication Systems,Quadrature Amplitude Modulation,Transmitters,Virtual Reality,Alamouti Scheme,Data Gathering Nodes,Mulitiple-input Multiple-output (mimo) Communication,Vertical-bell Laboratories Layered Space-time (v-blast),Wireless Sensor Networks
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Citation
S. K. Jayaweera, "V-BLAST-Based Virtual MIMO for Distributed Wireless Sensor Networks," in IEEE Transactions on Communications, vol. 55, no. 10, pp. 1867-1872, Oct. 2007, doi: 10.1109/TCOMM.2007.906389.
Abstract
A virtual multiple-input multiple-output (MIMO) communications architecture based on vertical Bell Laboratories layered space--time (V-BLAST) receiver processing is proposed for wireless sensor networks (WSNs). The proposed scheme does not require transmitter-side node cooperation unlike previously proposed virtual MIMO schemes. The energy and delay efficiencies of the proposed virtual MIMO scheme are derived for networks with both single- and multiple-antenna data gathering nodes (DGNs). Numerical results show the significant energy savings offered by the proposed method. These results also indicate that rate optimization over transmission distance is not essential as in virtual MIMO systems based on Alamouti scheme. In most scenarios, a fixed-rate virtual MIMO system with 4-quadrature amplitude modulation can achieve performance very close to that of an optimized, variable-rate system. In the case of single-antenna DGNs, the proposed scheme typically incur larger delay values compared to traditional single-input single-output communication, making it a good candidate for energy-starved but delay-tolerant WSNs. © 2007 IEEE. © 2008 Elsevier B.V., All rights reserved.
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Institute of Electrical and Electronics Engineers Inc.
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IEEE Transactions on Communications
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15580857
00906778
00906778