Lossy-Forward Relaying for Lossy Communications: Rate-Distortion and Outage Probability Analyses

This paper presents an in-depth performance analysis of lossy communications in a single-relay system, where the recovered information is not necessarily lossless in both the relay and the destination. In this system, the relay continues transmitting the sequence with source-relay (S-R) link errors...

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Bibliographic Details
Published in:IEEE transactions on wireless communications Vol. 18; no. 8; pp. 3974 - 3986
Main Authors: Lin, Wensheng, Qian, Shen, Matsumoto, Tad
Format: Journal Article
Language:English
Published: New York IEEE 01.08.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Codes
Coding
Communications systems
Computer simulation
Distortion
distributed lossy source coding
Encoding-Decoding
lossy-forward
outage probability
Power system reliability
Probability
Propagation losses
rate-distortion
Relay systems
Relaying
Relaying system
Relays
Source coding
Wireless communication
ISSN:1536-1276, 1558-2248
Online Access:Get full text
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Summary:This paper presents an in-depth performance analysis of lossy communications in a single-relay system, where the recovered information is not necessarily lossless in both the relay and the destination. In this system, the relay continues transmitting the sequence with source-relay (S-R) link errors to the destination even if errors are detected after decoding, i.e., so-called lossy-forward (LF) strategy. The problem can be decomposed into two parts as follows: a point-to-point coding problem in the S-R link and a lossy source coding problem with an LF relay in the source-destination (S-D) and a relay-destination (R-D) links. To begin with, we derive the admissible rate region of the lossy source coding problem with the LF relay for a specified distortion requirement. Then, we focus on the analysis of outage probability over block Rayleigh fading channels. Finally, a practical encoding/decoding scheme is proposed for the evaluation of system performance by computer simulations. Due to the suboptimal channel coding and incomplete utilization of joint typicality, the theoretical performance cannot be achieved in the simulation; however, the tendency of curves in simulations matches that in theoretical calculation.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2019.2919831