TY - GEN
T1 - The Gaussian wiretap channel with noisy public feedback
T2 - 43rd Asilomar Conference on Signals, Systems and Computers
AU - Kim, Tùng T.
AU - Poor, H. Vincent
PY - 2009
Y1 - 2009
N2 - A multiple-antenna Gaussian wiretap channel in which the number of antennas at the source is not larger than that at the eavesdropper is considered. Without feedback, the secrecy capacity over such a channel generally converges to a constant at high signal-to-noise ratio (SNR). A half-duplex secure protocol allowing the destination to actively broadcast random keys over insecure channels is proposed. It is shown that using multiple antennas at the destination is instrumental in achieving a secrecy rate that grows linearly with log SNR. The pre-log factor of the secrecy rate, i.e. the secure degree of freedom, is characterized, revealing an interesting interplay between the numbers of antennas at the three communication nodes.
AB - A multiple-antenna Gaussian wiretap channel in which the number of antennas at the source is not larger than that at the eavesdropper is considered. Without feedback, the secrecy capacity over such a channel generally converges to a constant at high signal-to-noise ratio (SNR). A half-duplex secure protocol allowing the destination to actively broadcast random keys over insecure channels is proposed. It is shown that using multiple antennas at the destination is instrumental in achieving a secrecy rate that grows linearly with log SNR. The pre-log factor of the secrecy rate, i.e. the secure degree of freedom, is characterized, revealing an interesting interplay between the numbers of antennas at the three communication nodes.
UR - http://www.scopus.com/inward/record.url?scp=77953835989&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77953835989&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2009.5469976
DO - 10.1109/ACSSC.2009.5469976
M3 - Conference contribution
AN - SCOPUS:77953835989
SN - 9781424458271
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 819
EP - 823
BT - Conference Record - 43rd Asilomar Conference on Signals, Systems and Computers
Y2 - 1 November 2009 through 4 November 2009
ER -