On the secrecy capacity of the MISO wiretap channel under imperfect channel estimation
Type
Conference PaperKAUST Department
Communication Theory LabComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2014-12Permanent link to this record
http://hdl.handle.net/10754/565013
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We consider a wiretap channel consisting of a source with multiple antennas, a legitimate receiver and an eavesdropper with a single antenna each. The channels between the source and the receivers undergo fast fading. We assume that the transmitter, in addition to the statistics of both channels, is only aware of a noisy version of the CSI to the legitimate receiver referred to as main channel. The legitimate receiver is aware of both its instantaneous channel gain and the transmitter's estimate of the main channel. On the other hand, the eavesdropper's receiver, in addition to its instantaneous channel realization, is aware of the actual main CSI and the transmitter's estimate as well. While the capacity of this channel is still open even with perfect CSI at the transmitter, we provide in this paper upper and lower bounds on the secrecy capacity. The upper bound is tighter than the one corresponding to perfect main CSI and the gap between the two upper bounds is characterized in function of the channel estimation error variance, at high-SNR. Furthermore, we show that our upper and lower bounds coincide in the case of no main CSI providing a trivial secrecy capacity.Citation
Rezki, Z., Alomair, B., & Alouini, M.-S. (2014). On the secrecy capacity of the MISO wiretap channel under imperfect channel estimation. 2014 IEEE Global Communications Conference. doi:10.1109/glocom.2014.7037037Conference/Event name
2014 IEEE Global Communications Conference, GLOBECOM 2014ISBN
9781479935116ae974a485f413a2113503eed53cd6c53
10.1109/GLOCOM.2014.7037037