RESEARCH ARTICLE

Energy-efficient design of VMIMO for WSN applications

  • Baoqiang KAN ,
  • Jianhua FAN
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  • Nanjing Telecommunication Technology Institute, Nanjing 210007, China

Received date: 16 Aug 2011

Accepted date: 01 Jun 2012

Published date: 05 Sep 2012

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

Wireless sensor networks (WSNs) have been paid more attention in recent years. However, energy efficiency is still a troublesome issue in real WSN applications. In this paper, we studied the performance of a virtual multiple-input multiple-output (VMIMO)-based communications architecture for WSN applications. By analyzing the bit error rate (BER) of each cooperative branch, we presented the closed-form expressions for optimal transmitting power (TP) scheme in K×1 VMIMO cluster-based system. Then, the impact of the number of cooperating nodes on energy efficiency with energy-per-useful-bit (EPUB) metric was studied. Performance enhancement of the strategy with optimal TP assignment was verified by extensive simulations under different scenes. A thorough explanation of optimally choosing the number of cooperating nodes was also delivered by the aid of simulation verifications.

Cite this article

Baoqiang KAN , Jianhua FAN . Energy-efficient design of VMIMO for WSN applications[J]. Frontiers of Electrical and Electronic Engineering, 2012 , 7(3) : 286 -292 . DOI: 10.1007/s11460-012-0201-3

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