{"title":"On the physical layer security of analog joint source channel coding schemes","authors":"E. Hodgson, G. Brante, R. Souza, J. L. Rebelatto","doi":"10.1109/SPAWC.2015.7227105","DOIUrl":null,"url":null,"abstract":"We propose the use of discrete-time all-analog joint source-channel coding over wireless channels in order to provide protection against eavesdropping. We consider a bandwidth expansion scheme using non-linear spiral-like curves and maximum likelihood detection with linear minimum mean square error estimation. Moreover, the transmitter uses truncated channel inversion, which significantly increases the signal-to-distortion ratio (SDR) at the intended receiver while keeping a low SDR at the eavesdropper. By considering the security gap as the performance metric, which is defined as the ratio between the channel signal-to-noise ratio (CSNR) of the legitimate receiver and of the eavesdropper for a given pair of target SDRs, we show that partial secrecy is possible in this setup.","PeriodicalId":211324,"journal":{"name":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SPAWC.2015.7227105","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
We propose the use of discrete-time all-analog joint source-channel coding over wireless channels in order to provide protection against eavesdropping. We consider a bandwidth expansion scheme using non-linear spiral-like curves and maximum likelihood detection with linear minimum mean square error estimation. Moreover, the transmitter uses truncated channel inversion, which significantly increases the signal-to-distortion ratio (SDR) at the intended receiver while keeping a low SDR at the eavesdropper. By considering the security gap as the performance metric, which is defined as the ratio between the channel signal-to-noise ratio (CSNR) of the legitimate receiver and of the eavesdropper for a given pair of target SDRs, we show that partial secrecy is possible in this setup.