Data Reduction with Quantization Constraints for Decentralized Estimation in Wireless Sensor Networks. (29th December 2013)

• Record Type: Journal Article
• Authors: Weng, Yang
• Other Names: Sun Shuli Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2014(2014)
• Publication Date: 2013-12-29
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2014/932358
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : The unknown vector estimation problem with bandwidth constrained wireless sensor network is considered. In such networks, sensor nodes make distributed observations on the unknown vector and collaborate with a fusion center to generate a final estimate. Due to power and communication bandwidth limitations, each sensor node must compress its data and transmit to the fusion center. In this paper, both centralized and decentralized estimation frameworks are developed. The closed-form solution for the centralized estimation framework is proposed. The computational complexity of decentralized estimation problem is proven to be NP-hard and a Gauss-Seidel algorithm to search for an optimal solution is also proposed. Simulation results show the good performance of the proposed algorithms.