Title :
A Note on the Secrecy Capacity of the Multiple-Antenna Wiretap Channel
Author :
Tie Liu ; Shamai, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX
fDate :
6/1/2009 12:00:00 AM
Abstract :
The secrecy capacity of the multiple-antenna wiretap channel under the average total power constraint was recently characterized, independently, by Khisti and Wornell and Oggier and Hassibi using a Sato-like argument and matrix analysis tools. This paper presents an alternative characterization of the secrecy capacity of the multiple-antenna wiretap channel under a more general matrix constraint on the channel input using a channel-enhancement argument. This characterization is by nature information-theoretic and is directly built on the intuition regarding to the optimal transmission strategy in this communication scenario.
Keywords :
antenna arrays; channel capacity; matrix algebra; average total power constraint; channel capacity; matrix analysis tool; matrix constraint; multiple-antenna wiretap channel; optimal transmission; Additive noise; Capacity planning; Cities and towns; Costs; Covariance matrix; Decoding; Degradation; Information theory; Receiving antennas; Wireless communication; Channel enhancement; multiple-antenna communications; wiretap channel;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2009.2018322