TY - JOUR
T1 - On the Accumulated Loopback Self-Interference of Two-Way Full-Duplex AF Relaying Systems
AU - Chang, Min Kuan
AU - Chien, Feng Tsun
AU - Kuo, Chih Hung
AU - Chen, Yen Chang
N1 - Funding Information:
Manuscript received February 4, 2018; revised June 30, 2018, October 22, 2018, and January 24, 2019; accepted February 9, 2019. Date of publication February 15, 2019; date of current version May 15, 2019. This work is partially supported by the “Center for mmWave Smart Radar Systems and Technologies” under the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE), and partially supported by the Ministry of Science and Technology (MOST) under grants MOST 107-3017-F-009-001 and MOST 107-2221-E-009-037-MY2, in Taiwan. The associate editor coordinating the review of this paper and approving it for publication was W. Chen. (Corresponding author: Feng-Tsun Chien.) M.-K. Chang and Y.-C. Chen are with the Department of Electrical Engineering, National Chung Hsing University, Taichung 402, Taiwan (e-mail: [email protected]).
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2019/5
Y1 - 2019/5
N2 - Two-way full-duplex (TWFD) transmissions in cooperative amplify-and-forward (AF) relaying systems provide a promising way of communications with the improved spectral efficiency by concurrently transmitting/receiving data in the same frequency band and by the two-way transmission protocol. However, the loopback self-interference, caused by the imperfect channel estimation in the loopback link, at the AF relay accumulates and is forwarded to the end users recurrently, which substantially degrades the end users' error performance if this accumulated loopback self-interference (ALSI) does not converge. It is therefore of critical importance to analyze the convergence behavior of the ALSI in the TWFD systems with AF relaying. In this paper, we establish sufficient conditions on the relay power to ensure the convergence of the ALSI, with which the average limiting signal-to-interference-plus-noise ratio at the infinite time horizon is derived. In addition, we specify the relay power at which the signal-to-noise ratio reaches the maximal value under different scenarios and obtain an upper bound to the symbol error rate. Finally, extensive computer simulations results are provided to corroborate the analytic derivations.
AB - Two-way full-duplex (TWFD) transmissions in cooperative amplify-and-forward (AF) relaying systems provide a promising way of communications with the improved spectral efficiency by concurrently transmitting/receiving data in the same frequency band and by the two-way transmission protocol. However, the loopback self-interference, caused by the imperfect channel estimation in the loopback link, at the AF relay accumulates and is forwarded to the end users recurrently, which substantially degrades the end users' error performance if this accumulated loopback self-interference (ALSI) does not converge. It is therefore of critical importance to analyze the convergence behavior of the ALSI in the TWFD systems with AF relaying. In this paper, we establish sufficient conditions on the relay power to ensure the convergence of the ALSI, with which the average limiting signal-to-interference-plus-noise ratio at the infinite time horizon is derived. In addition, we specify the relay power at which the signal-to-noise ratio reaches the maximal value under different scenarios and obtain an upper bound to the symbol error rate. Finally, extensive computer simulations results are provided to corroborate the analytic derivations.
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U2 - 10.1109/TCOMM.2019.2899872
DO - 10.1109/TCOMM.2019.2899872
M3 - Article
AN - SCOPUS:85065886255
SN - 0090-6778
VL - 67
SP - 3167
EP - 3181
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 5
M1 - 8642957
ER -