In this paper, we investigate the system outage performance of full-duplex (FD) two-way relay networks where all nodes are equipped with FD multiple-input multiple-output (MIMO) capability and two sources exchange information via decode-And-forward (DF) relay protocol in two consecutive time slots. In order to completely separate the desired signal and interference, we consider a finite size of buffer at the relay. We propose zero-forcing based beamforming schemes for two different cases of the buffer-Aided relay and non-buffer-Aided relay. We derive exact closed-form expression and lower bound of the outage probability for those two-way relay system, respectively. Numerical results show that the proposed buffer-Aided relay scheme significantly improves the system performance over the conventional scheme in terms of outage probability.
Bibliographical noteFunding Information:
Manuscript received January 27, 2020; revised May 8, 2020; accepted June 1, 2020. Date of publication June 8, 2020; date of current version August 13, 2020. This work was supported in part by the Future Combat System Network Technology Research Center Program of Defense Acquisition Program Administration and Agency for Defense Development under Grant UD190033ED. The review of this article was coordinated by Dr. W. Song. (Corresponding authors: Sung Sik Nam; Young-Chai Ko.) Ji-Ho Lee and Young-Chai Ko are with the School of Electrical Engineering, Korea University, Seoul 136-713, Korea (e-mail: firstname.lastname@example.org; email@example.com).
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- Two-way relay
- decode and forward
- outage probability
ASJC Scopus subject areas
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics