TY - JOUR
T1 - Secure Degrees of Freedom Region of the Two-User MISO Broadcast Channel with Alternating CSIT
AU - Mukherjee, Pritam
AU - Tandon, Ravi
AU - Ulukus, Sennur
N1 - Funding Information:
Manuscript received February 4, 2015; revised December 12, 2016; accepted December 21, 2016. Date of publication February 2, 2017; date of current version May 18, 2017. This work was supported in part by NSF under Grant CNS 13-14733, Grant CCF 14-22111, Grant CCF 14-22129, and Grant CCF 14-22090. This paper was presented in part at the IEEE ISIT 2014, the IEEE ICC 2015, and the IEEE ISIT 2015.
Publisher Copyright:
© 2017 IEEE.
PY - 2017/6
Y1 - 2017/6
N2 - The two user multiple-input single-output (MISO) broadcast channel with confidential messages (BCCM) is studied, in which the nature of channel state information at the transmitter (CSIT) from each user can be of the form Ii, i = 1, 2 where I1, I2 ϵ {P,D,N}, and the forms P, D, and N correspond to perfect and instantaneous, completely delayed, and no CSIT, respectively. Thus, the overall CSIT can alternate between nine possible states corresponding to all possible values of I1 I2, with each state occurring for λI1 I2 fraction of the total duration. We assume that perfect and instantaneous CSI is available at the all receivers. The main contribution of this paper is to establish the secure degrees of freedom (s.d.o.f.) region of the MISO BCCM with alternating CSIT with the symmetry assumption, where λI1 I2 = λI2 I1 . The main technical contributions include developing 1) novel achievable schemes for MISO BCCM with alternating CSIT with security constraints, which also highlight the synergistic benefits of inter-state coding for secrecy; 2) new converse proofs via local statistical equivalence and channel enhancement; and 3) showing the interplay between various aspects of channel knowledge and their impact on s.d.o.f.
AB - The two user multiple-input single-output (MISO) broadcast channel with confidential messages (BCCM) is studied, in which the nature of channel state information at the transmitter (CSIT) from each user can be of the form Ii, i = 1, 2 where I1, I2 ϵ {P,D,N}, and the forms P, D, and N correspond to perfect and instantaneous, completely delayed, and no CSIT, respectively. Thus, the overall CSIT can alternate between nine possible states corresponding to all possible values of I1 I2, with each state occurring for λI1 I2 fraction of the total duration. We assume that perfect and instantaneous CSI is available at the all receivers. The main contribution of this paper is to establish the secure degrees of freedom (s.d.o.f.) region of the MISO BCCM with alternating CSIT with the symmetry assumption, where λI1 I2 = λI2 I1 . The main technical contributions include developing 1) novel achievable schemes for MISO BCCM with alternating CSIT with security constraints, which also highlight the synergistic benefits of inter-state coding for secrecy; 2) new converse proofs via local statistical equivalence and channel enhancement; and 3) showing the interplay between various aspects of channel knowledge and their impact on s.d.o.f.
KW - Information theoretic security
KW - alternating channel state information (CSI)
KW - broadcast channel
KW - multiple-input single-output (MISO)
KW - secure degrees of freedom
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U2 - 10.1109/TIT.2017.2663427
DO - 10.1109/TIT.2017.2663427
M3 - Article
AN - SCOPUS:85028063344
SN - 0018-9448
VL - 63
SP - 3823
EP - 3853
JO - IRE Professional Group on Information Theory
JF - IRE Professional Group on Information Theory
IS - 6
M1 - 7840026
ER -