NDLI: Lossy transmission of correlated sources over multiple-access wiretap channels

Content Provider	IET Digital Library
Author	Salehkalaibar, Sadaf Aref, Mohammad Reza
Abstract	In this study, the authors study lossy communication of correlated sources over a multiple-access wiretap channel (MAC-WT). Consider a system with two transmitters, a receiver and an eavesdropper. There are two correlated sources where each of them is observed by the corresponding transmitter, separately. Each transmitter wishes to describe its source sequence to the receiver with a desired distortion. The sources need to be kept secret from the eavesdropper. They find an achievable region for the MAC-WT with correlated sources by separation. A joint source-channel coding scheme for the MAC-WT is also proposed. They consider lossy communication of a bivariate Gaussian source over Gaussian MAC-WT (GMAC-WT). They propose a separation-based achievable scheme for the GMAC-WT. An achievable region for the GMAC-WT based on uncoded transmission is also found. They compare the separate and the uncoded schemes for the symmetric GMAC-WT, where the same constraint on the power of each transmitter is imposed and the same distortion on each source is achieved. For another case of source correlation coefficient, they compare the separate, uncoded and hybrid schemes. They obtain outer bounds to the rate-distortion-equivocation region of: (i) the degraded MAC-WT where the output at the eavesdropper is a degraded version of the output at the receiver, (ii) the GMAC-WT with independent sources and (iii) the symmetric GMAC-WT when the correlation of the sources is maximum. Optimal regions for some cases are established.
Starting Page	754
Ending Page	770
Page Count	17
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 6, Apr (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0518
Journal	IET Communications
Publisher Date	2015-02-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bivariate Gaussian Source Code Combined Source-channel Coding Correlation Method Eavesdropper Gaussian Channel Gaussian MAC-WT GMAC-WT Joint Source-channel Coding Scheme Lossy Communication Lossy Transmission Multi-access System Multiple Access Communication Multiple-access Wiretap Channel Radio Link And Equipment Radio Receiver Radio Transmitters Rate-distortion-equivocation Region Signal Processing And Detection Source Correlation Coefficient Source Separation Telecommunication Security Uncoded Transmission
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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