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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In wiretap channels the eavesdropper's channel state information (CSI) iscommonly assumed to be known at transmitter, fully or partially. However, underperfect secrecy constraint the eavesdropper may not be motivated to feedbackany correct CSI. In this paper we consider a more feasible problem for thetransmitter to have eavesdropper's CSI. That is, the fast fadingmultiple-antenna Gaussian broadcast channels (FMGBC-CM) with confidentialmessages, where both receivers are legitimate users such that they both arewilling to feedback accurate CSI to maintain their secure transmission, and notto be eavesdropped by the other. We assume that only the statistics of thechannel state information are known by the transmitter. We first show thenecessary condition for the FMGBC-CM not to be degraded to the common wiretapchannels. Then we derive the achievable rate region for the FMGBC-CM where thechannel input covariance matrices and the inflation factor are left unknown andto be solved. After that we provide an analytical solution to the channel inputcovariance matrices. We also propose an iterative algorithm to solve thechannel input covariance matrices and the inflation factor. Due to thecomplicated rate region formulae in normal SNR, we resort to low SNR analysisto investigate the characteristics of the channel. Finally, numerical examplesshow that under perfect secrecy constraint both users can achieve positiverates simultaneously, which verifies our derived necessary condition. Numericalresults also elucidate the effectiveness of the analytic solution and proposedalgorithm of solving the channel input covariance matrices and the inflationfactor under different conditions.

On The Fast Fading Multiple-Antenna Gaussian Broadcast Channel with Confidential Messages and Partial CSIT