Ergodic secrecy capacity for downlink multiuser networks using switch‐and‐examine combining with post‐selection scheduling scheme. Issue 9 (11th April 2016)

• Record Type: Journal Article
• Authors: Yang, Maoqiang; Zhang, Bangning; Huang, Yuzhen; Guo, Daoxing; Yi, Xu
• Is Part Of: Electronics letters. Volume 52:Issue 9(2016)
• Page Start: 720
• Page End: 722
• Publication Date: 2016-04-11
• Subjects: telecommunication scheduling -- diversity reception -- telecommunication switching; ergodic secrecy capacity -- switch‐and‐examine combining -- post‐selection scheduling scheme -- multiuser downlink wiretap network -- base station -- multiple‐legitimate users -- multiple‐eavesdroppers -- channel state information -- eavesdropper channel -- asymptotic closed‐form expressions -- maximum ratio combining -- signal‐to‐noise ratio slope -- power offset -- main link -- wiretap link -- switching threshold; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.4375
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A novel threshold‐based scheduling scheme for multiuser downlink wiretap networks is addressed, which consist of a base station (BS), multiple legitimate users and multiple eavesdroppers. Particularly, the active scenario is concentrated, where BS has access to the channel state information for the eavesdropper's channel. In doing so, new exact and asymptotic closed‐form expressions for the ergodic secrecy capacity are derived for multiuser downlink networks using switch‐and‐examine combining with post‐selection scheduling at legitimate users and maximum ratio combining at the eavesdroppers. Moreover, the high signal‐to‐noise ratio slope and power offset are also given to explicitly characterise the impact of main link and wiretap link on the ergodic secrecy capacity. Simulation results show the effect of key parameters such as the number of legitimate users and eavesdroppers, switching threshold on the secrecy performance of the considered wiretap network.