TY - JOUR
T1 - Secrecy Performance of Finite-Sized Cooperative Full-Duplex Relay Systems with Unreliable Backhauls
AU - Liu, Hongwu
AU - Kim, Kyeong Jin
AU - Tsiftsis, Theodoros A.
AU - Kwak, Kyung Sup
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received March 2, 2017; revised June 22, 2017; accepted August 16, 2017. Date of publication August 29, 2017; date of current version September 28, 2017. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Stefano Tomasin. This work was supported in part by the U.S. National Science Foundation under Grants CMMI-1435778 and ECCS-1647198, in part by SRF for ROCS, SEM, Shandong Provincial Natural Science Foundation, China, under Grant 2014ZRB019XM, and in part by the Ministry of Science and ICT, Korea, under the Information Technology Research Center support program (IITP-2017-2014-0-00729) supervised by the Institute for Information and Communications Technology Promotion. (Corresponding author: Kyeong Jin Kim.) H. Liu is with the Department of Information and Communication Engineering, Inha University, Incheon 402-751, South Korea, and also with Shandong Jiaotong University, Jinan 250357, China (e-mail: hong.w.liu@hotmail.com).
PY - 2017/12/1
Y1 - 2017/12/1
N2 - This paper investigates secrecy performance of finite-sized cooperative full-duplex relay (FDR) systems with unreliable wireless backhaul connections across multiple transmitters under Nakagami- $m$ fading. Closed-form expressions for the secrecy outage probability and probability of nonzero achievable secrecy rate are derived in terms of self-interference (SI), transmitter cooperation, and backhaul reliability. It is shown that transmitter cooperation can effectively enhance the secrecy performance, while the asymptotic limits on the secrecy outage probability and probability of nonzero achievable secrecy rate are exclusively determined by backhaul reliability. With the aid of transmitter cooperation, the burden of SI cancelation can be alleviated for the FDR system in achieving the smallest allowed secrecy outage probability. Compared to that of a half-duplex relay (HDR) system, the FDR system achieves a lower secrecy outage probability with well suppressed SI. The analysis shows that the secrecy outage probability achieved by the FDR system converges to that of the HDR system under perfect backhaul as the target secrecy rate becomes small. The secrecy performance metrics of the considered system are verified by simulations for various backhaul scenarios.
AB - This paper investigates secrecy performance of finite-sized cooperative full-duplex relay (FDR) systems with unreliable wireless backhaul connections across multiple transmitters under Nakagami- $m$ fading. Closed-form expressions for the secrecy outage probability and probability of nonzero achievable secrecy rate are derived in terms of self-interference (SI), transmitter cooperation, and backhaul reliability. It is shown that transmitter cooperation can effectively enhance the secrecy performance, while the asymptotic limits on the secrecy outage probability and probability of nonzero achievable secrecy rate are exclusively determined by backhaul reliability. With the aid of transmitter cooperation, the burden of SI cancelation can be alleviated for the FDR system in achieving the smallest allowed secrecy outage probability. Compared to that of a half-duplex relay (HDR) system, the FDR system achieves a lower secrecy outage probability with well suppressed SI. The analysis shows that the secrecy outage probability achieved by the FDR system converges to that of the HDR system under perfect backhaul as the target secrecy rate becomes small. The secrecy performance metrics of the considered system are verified by simulations for various backhaul scenarios.
KW - Wireless backhaul
KW - full-duplex relay
KW - secrecy outage probability
KW - two-hop relaying protocol
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U2 - 10.1109/TSP.2017.2745463
DO - 10.1109/TSP.2017.2745463
M3 - Article
AN - SCOPUS:85028726862
VL - 65
SP - 6185
EP - 6200
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
SN - 1053-587X
IS - 23
M1 - 8017511
ER -