Title :
On Ergodic Secrecy Rate for MISO Wiretap Broadcast Channels with Opportunistic Scheduling
Author :
Minyan Pei ; Swindlehurst, A.L. ; Dongtang Ma ; Jibo Wei
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
In this letter, we study on-off opportunistic beamforming for the multiuser downlink channel with a passive eavesdropper. Two opportunistic scheduling schemes exploiting multiuser diversity are investigated which require limited feedback of the effective signal-to-noise ratio (SNR) from the legitimate users. For the two scheduling schemes, we derive new closed-form expressions for the ergodic secrecy rate with on-off beamforming over Rayleigh fading channels. Numerical results are provided to verify our analytical results and illustrate the impact of multiuser diversity on the secrecy performance.
Keywords :
MIMO communication; Rayleigh channels; array signal processing; broadcast channels; diversity reception; multiuser channels; scheduling; telecommunication security; MISO wiretap broadcast channel; Rayleigh fading channel; SNR; ergodic secrecy rate performance; limited feedback; multiuser diversity; multiuser downlink channel; on-off opportunistic beamforming; opportunistic scheduling; opportunistic scheduling scheme; passive eavesdropper; signal-to-noise ratio; users legitimation; Array signal processing; Mobile antennas; Random variables; Rayleigh channels; Resource management; Signal to noise ratio; Opportunistic beamforming; multiuser diversity; multiuser scheduling; physical layer security;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.112513.131926
