This paper concerns the feasibility of full-duplex large-scale multiple-input-multiple-output cellular systems. We first derive the analytic model of the ergodic achievable sum-rate for cell-boundary users. The model is derived by applying a simple linear filter, i.e., matched filter or zero-forcing filter, to the base-station (BS). In the analytic model, we consider large-scale fading, pilot contamination, transmitter noise, and receiver distortion. In addition, to solve the critical pilot overhead problem induced by self-interference channel estimation, we propose a pilot transmission scheme - the simultaneous pilot transmission (SPT) - and assess its performance, in terms of the ergodic sum-rate. In considering two multicell scenarios, cooperative and non-cooperative multicell systems, we obtain the ergodic achievable sum-rate by reflecting the characteristic of each scenarios, such as limited front-haul capacity and procedures of channel estimation. With all derived results, to investigate the feasibility, we observe the tradeoffs between the full- and half-duplex systems, between the SPT and conventional scheme, and between the two multicell scenarios with respect to various system parameters and environment. In the end, we confirm the tightness of our analytic model and advantages of full-duplex, SPT, and cooperation of BSs in our system model.
Bibliographical noteFunding Information:
Manuscript received September 14, 2017; revised February 3, 2018 and June 18, 2018; accepted July 4, 2018. Date of publication July 27, 2018; date of current version September 10, 2018. This work was supported by “The Cross-Ministry Giga KOREA Project” grant funded by the Korea Government (MSIT), (Research and Development of Open 5G Reference Model) under Grant GK18S0400. The associate editor coordinating the review of this paper and approving it for publication was D. W. K. Ng. (Corresponding author: Joonhyuk Kang.) J. Koh and J. Kang are with the Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, South Korea (e-mail: firstname.lastname@example.org; email@example.com).
All Science Journal Classification (ASJC) codes
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics