Secure Communications System Through Concurrent AJ and LPD Evaluation

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题名:	Secure Communications System Through Concurrent AJ and LPD Evaluation
作者:	Liao,CH;Tsay,MK;Lee,ZS
贡献者:	通訊工程研究所
关键词:	LOW-PROBABILITY;DETECTABILITY;INTERCEPT
日期:	2009
上传时间:	2010-06-29 20:12:55 (UTC+8)
出版者:	中央大學
摘要:	In this paper, a systematic approach and their corresponding metrics for concurrent anti-jamming (AJ) and low probability of detection (LPD) performance evaluations of a secure communications system are investigated. In general, it is necessary to deal simultaneously with adversary threats of both active jamming and passive detection for a secure communications system concern. For independent or concurrent AJ and LPD performance evaluations, a single varying paired and multiple paired fixed collocated jammers/interceptors scenario is explored with real sinc type (sin(x)/x) antenna patterns being considered for the communicators. The error probability with both AJ and LPD being considered simultaneously can be derived as system- and geometry-dependent factors and categorized as system metrics related to jammers, interceptors, and communicators themselves only. Whenever multiple collocated jammers/interceptors are considered, we can observe interesting "smoothed" effects for bit energy to jamming density ratio (E (b) /J (o) ), when one of these varying jammers/interceptors is approaching or receding. In addition, by means of these system metrics, it is intuitive and straightforward to enhance system performance for the victim or to deteriorate system performance for the adversary, respectively. Moreover, the proposed approach and metrics have also paved one practical way for the developments of the latest emphasized cognitive radio (CR) communications systems, if all the collocated jammers/interceptors on the proposed scenario are replaced with "cooperative" communicators.
關聯:	WIRELESS PERSONAL COMMUNICATIONS
显示于类别:	[通訊工程研究所] 期刊論文

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