Title
Energy efficient estimation of gaussian sources over inhomogeneous gaussian MAC channels
Document Type
Conference Proceeding
Publication Date
12-1-2008
Abstract
In this paper, we first provide a joint source and channel coding (JSCC) approach in estimating Gaussian sources over Gaussian MAC channels, as well as its sufficient and necessary condition in restoring Gaussian sources with a prescribed distortion value. An interesting relationship between our proposed joint approach with a more straightforward separate source and channel coding (SSCC) scheme is further established. We then formulate constrained power minimization problems to minimize total transmission power consumption under a distortion constraint for arbitrary in-homogeneous networks under JSCC, SSCC and uncoded scheme (UC). They are transformed to relaxed convex geometric programming problems. Our numerical results exhibit that none of the three schemes is consistently most energy efficient. The proposed JSCC could be more energy efficient than either the uncoded scheme, or SCCC, but not both. In addition, we prove that the optimal decoding order to minimize the total transmission powers for both source and channel coding parts is solely subject to the ordering of MAC channel qualities, and has nothing to do with the ranking of measurement qualities across measuring nodes. © 2008 IEEE.
Publication Source (Journal or Book title)
GLOBECOM - IEEE Global Telecommunications Conference
First Page
4647
Last Page
4651
Recommended Citation
Wei, S., Kannan, R., Iyengar, S., & Rao, N. (2008). Energy efficient estimation of gaussian sources over inhomogeneous gaussian MAC channels. GLOBECOM - IEEE Global Telecommunications Conference, 4647-4651. https://doi.org/10.1109/GLOCOM.2008.ECP.890