Rate-distortion and outage probability analyses for single helper assisted lossy communications

Lin, Wensheng; Xue, Qiang; He, Jiguang; Juntti, Markku; Matsumoto, Tad (2019-09-05)
 
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https://doi.org/10.1109/TVT.2019.2939622

Lin, Wensheng
Xue, Qiang
He, Jiguang
Juntti, Markku
Matsumoto, Tad
Institute of Electrical and Electronics Engineers
05.09.2019

W. Lin, Q. Xue, J. He, M. Juntti and T. Matsumoto, "Rate-Distortion and Outage Probability Analyses for Single Helper Assisted Lossy Communications," in IEEE Transactions on Vehicular Technology, vol. 68, no. 11, pp. 10882-10894, Nov. 2019. doi: 10.1109/TVT.2019.2939622

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doi:https://doi.org/10.1109/TVT.2019.2939622
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https://urn.fi/URN:NBN:fi-fe2019121146684
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Abstract

The primary objective of this paper is to investigate the performance improvement provided by a helper, with the aim of applications to a lossy communication system in wireless sensor networks (WSNs) and/or Internet of Things (IoT). Initially, we formulate the system model as a problem of multiterminal source coding with a helper, and determine an inner bound on the achievable rate-distortion region for binary sources. Based on Shannon’s lossy source-channel separation theorem, we further derive the outage probability of the system over block Rayleigh fading channels. The numerical results indicate that a helper can obviously expand the achievable rate-distortion region and provide diversity gains which in turn decrease the outage probability. Finally, we evaluate the practical performance of outage probability through simulations with exclusive-or (XOR) as an example of the helper structure. Both the simulation and theoretical results show second order diversity by introducing a helper, and lower outage probability by increasing the acceptable distortions.

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