Joint adaptive power allocation and interference suppression algorithms based on theMSER criterion for wireless sensor networks |
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Authors: | Gui-jie Wang Yun-long Cai Min-jian Zhao Jie Zhong |
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Affiliation: | 1. Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China
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Abstract: | In this study, a two-hop wireless sensor network with multiple relay nodes is considered where the amplify-and-forward (AF) scheme is employed. Two algorithms are presented to jointly consider interference suppression and power allocation (PA) based on the minimization of the symbol error rate (SER) criterion. A stochastic gradient (SG) algorithm is developed on the basis of the minimum-SER (MSER) criterion to jointly update the parameter vectors that allocate the power levels among the relay sensors subject to a total power constraint and the linear receiver. In addition, a conjugate gradient (CG) algorithm is developed on the basis of the SER criterion. A centralized algorithm is designed at the fusion center. Destination nodes transmit the quantized information of the PA vector to the relay nodes through a limited-feedback channel. The complexity and convergence analysis of the proposed algorithms are carried out. Simulation results show that the proposed two adaptive algorithms significantly outperform the other previously reported algorithms. |
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Keywords: | Cooperative communications Adaptive filtering Symbol error rate(SER) Interference suppression Power allocation |
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