Title :
On the zero forcing optimality for friendly jamming in MISO wiretap channels
Author :
Wolf, Anne ; Jorswieck, Eduard A.
Author_Institution :
Dept. of Electr. Eng. & Inf. Technol., Dresden Univ. of Technol., Dresden, Germany
Abstract :
We study beamforming strategies for a friendly jammer (or helper) in a MISO wiretap channel. We characterize the beamforming strategy for the maximization of the secrecy rate and analyze the optimality of zero forcing. We show that zero forcing is optimal up to a small constant for high SNR. For low SNR, we derive optimal beamforming strategies for transmitter and helper in terms of minimum Eb/N0 and wideband slope.
Keywords :
fading channels; jamming; transmitters; MISO wiretap channel; beamforming strategy; friendly jamming; quasi-static block flat fading MISO channel; secrecy rate maximization; transmitter; zero forcing optimality; Array signal processing; Interference; Receivers; Signal to noise ratio; Transmitters; Upper bound; Wideband;
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2010 IEEE Eleventh International Workshop on
Conference_Location :
Marrakech
Print_ISBN :
978-1-4244-6990-1
Electronic_ISBN :
1948-3244
DOI :
10.1109/SPAWC.2010.5671002
