English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, we investigate the secrecy outage performance of decode-and-forward (DF) buffer-aided relaying networks with a multi-antenna destination in the presence of an eavesdropper. In order to take full advantage of the benefits provided by the multiple antennas at the destination and the available relays, we adopt the max-link relay selection scheme and propose a half-duplex and two full-duplex secure transmission schemes for secrecy improvement, i.e., 1) maximal-ratio combining (MRC), 2) maximal-ratio combining/cooperative jamming (MRC/CJ), and 3) zero-forcing beamforming/cooperative jamming (ZFB/CJ). For all proposed schemes, we present exact and asymptotic closed-form expressions of the secrecy outage probability by modeling the dynamic buffer state transitions as a Markov chain. Moreover, simple and informative asymptotic results are provided under both <inline-formula> <tex-math notation="LaTeX">$L\not \to \infty $ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$L \to \infty $ </tex-math></inline-formula> scenarios (where <inline-formula> <tex-math notation="LaTeX">$L$ </tex-math></inline-formula> denotes the buffer size), from which we can obtain further insights on the secrecy diversity gain and the secrecy coding gain. The highlights of this paper can be summarized as follows: 1) Under <inline-formula> <tex-math notation="LaTeX">$L\not \to \infty $ </tex-math></inline-formula> scenario, the secrecy diversity gains of all proposed schemes both reach <inline-formula> <tex-math notation="LaTeX">$M$ </tex-math></inline-formula>. When <inline-formula> <tex-math notation="LaTeX">$L \to \infty $ </tex-math></inline-formula>, the secrecy diversity gains of MRC, MRC/CJ and ZFB/CJ increase to <inline-formula> <tex-math notation="LaTeX">$M\left ({{1 + N_{D} } }\right)$ </tex-math></inline-formula>, <inline-formula> <tex-math notation="LaTeX">$MN_{D}$ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$2M$ </tex-math></inline-formula> respectively, where <inline-formula> <tex-math notation="LaTeX">$M$ </tex-math></inline-formula> is the number of relays and <inline-formula> <tex-math notation="LaTeX">$N_{D}$ </tex-math></inline-formula> represents the number of antennas at the destination; 2) The secrecy coding gain of the system differs with different schemes, and it improves with the increase of <inline-formula> <tex-math notation="LaTeX">$M$ </tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$N_{D}$ </tex-math></inline-formula> under both the two scenarios; and 3) Under the scenario <inline-formula> <tex-math notation="LaTeX">$L\not \to \infty $ </tex-math></inline-formula>, ZFB/CJ outperforms MRC and MRC/CJ across the entire signal-to-noise ratio (SNR) range of interest, however, when <inline-formula> <tex-math notation="LaTeX">$L \to \infty $ </tex-math></inline-formula>, ZFB/CJ outperforms MRC/CJ and MRC in the low SNR regime, while the opposite holds in the high SNR regime.

Secrecy Outage Performance for DF Buffer-Aided Relaying Networks With a Multi-Antenna Destination