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Mathematical Problems in Engineering
Volume 2015, Article ID 580289, 7 pages
http://dx.doi.org/10.1155/2015/580289
Research Article

Optimal Power Constrained Distributed Detection over a Noisy Multiaccess Channel

1School of New Media, Zhejiang University of Media and Communications, Hangzhou 310018, China
2No. 38 Research Institute, China Electronics Technology Group Corporation, Hefei 230000, China

Received 26 November 2014; Revised 28 December 2014; Accepted 28 December 2014

Academic Editor: Hui Zhang

Copyright © 2015 Zhiwen Hu and Zhenhua Xu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The problem of optimal power constrained distributed detection over a noisy multiaccess channel (MAC) is addressed. Under local power constraints, we define the transformation function for sensor to realize the mapping from local decision to transmitted waveform. The deflection coefficient maximization (DCM) is used to optimize the performance of power constrained fusion system. Using optimality conditions, we derive the closed-form solution to the considered problem. Monte Carlo simulations are carried out to evaluate the performance of the proposed new method. Simulation results show that the proposed method could significantly improve the detection performance of the fusion system with low signal-to-noise ratio (SNR). We also show that the proposed new method has a robust detection performance for broad SNR region.