Title :
On diversity schemes in decentralized estimation
Author :
Leong, Alex S. ; Dey, Subhrakanti
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Melbourne, Melbourne, VIC, Australia
Abstract :
This paper is concerned with the decentralized estimation of a Gaussian source using multiple sensors. We consider a diversity scheme where only the sensor with the best channel sends their measurements to a fusion center, using the analog amplify and forwarding technique. A distributed version of the diversity scheme where sensors decide what to transmit based only on their local information is also considered. We derive asymptotic expressions for the expected distortion of these schemes as the number of sensors becomes large. We also study the optimal power allocation problem for minimizing the expected distortion subject to average power constraints.
Keywords :
amplify and forward communication; diversity reception; sensor fusion; wireless sensor networks; Gaussian source; amplify and forwarding technique; asymptotic expressions; average power constraints; decentralized estimation; distortion subject; diversity scheme; fusion center; multiple sensors; optimal power allocation problem; Resource management; TV;
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2010 IEEE Eleventh International Workshop on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-6990-1
Electronic_ISBN :
1948-3244
DOI :
10.1109/SPAWC.2010.5671086