Title :
Compressed sensing of Gauss-Markov random field with wireless sensor networks
Author :
Oka, Anand ; Lampe, Lutz
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of British Columbia, Vancouver, BC
Abstract :
We propose a scalable and energy efficient method for reconstructing a dasiasparsepsila Gauss-Markov random field that is observed by an array of sensors and described over wireless channels to a fusion center. The encoder is universal, i.e. invariant to the statistical model of the source and the channel, and is based on compressed sensing. The reconstruction algorithms exploit the a-priori statistical information about the field and the channel at the fusion center to yield a performance comparable to information theoretic bounds. Furthermore, by putting stringent constraints on the sensing matrix we avoid (or even eliminate) inter-sensor communication while suffering negligible degradation in performance.
Keywords :
Gaussian processes; Markov processes; channel coding; matrix algebra; random processes; sensor arrays; sensor fusion; statistical analysis; wireless sensor networks; Gauss-Markov random fields; a-priori statistical information; compressed sensing; fusion center; intersensor communication; matrix sensing; reconstruction algorithms; sensors array; statistical model; wireless sensor networks; Compressed sensing; Degradation; Energy efficiency; Gaussian channels; Gaussian processes; Reconstruction algorithms; Sensor arrays; Sensor fusion; Sensor phenomena and characterization; Wireless sensor networks;
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop, 2008. SAM 2008. 5th IEEE
Conference_Location :
Darmstadt
Print_ISBN :
978-1-4244-2240-1
Electronic_ISBN :
978-1-4244-2241-8
DOI :
10.1109/SAM.2008.4606867