Title :
Power-Distortion Performance of Successive Coding Strategy in Gaussian Ceo Problem
Author :
Behroozi, Hamid ; Soleymani, M. Reza
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que.
Abstract :
In this paper, we investigate the power-distortion performance of the successive coding strategy in the so-called quadratic Gaussian CEO problem. In the CEO problem, L sensors will be deployed to observe independently corrupted versions of the source. They communicate information about their observations to the CEO through a Gaussian multiple access channel (MAC) without cooperating with each other. Two types of MAC are considered: orthogonal MAC and interfering (non-orthogonal) MAC. We address the problem from an information theoretic perspective and obtain the optimal tradeoff between the transmission cost, i.e., power, and the distortion D using Shannon´s source-channel separation theorem. We also determine the optimal power allocation scheme based on the successive coding strategy to minimize the total power consumption in the sensor network
Keywords :
Gaussian processes; combined source-channel coding; multi-access systems; wireless sensor networks; Gaussian CEO problem; multiple access channel; optimal power allocation scheme; power-distortion performance; sensor network; source-channel separation theorem; successive coding strategy; Character generation; Cost function; Decoding; Energy consumption; Hardware; Intelligent sensors; Power engineering and energy; Power engineering computing; Sensor phenomena and characterization; Wireless sensor networks;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1660959
