Outage and ergodic sum‐rate performance of cooperative MIMO‐NOMA with imperfect CSI and SIC. (3rd April 2020)

• Record Type: Journal Article
• Authors: Aldababsa, Mahmoud; Kucur, Oğuz
• Is Part Of: International journal of communication systems. Volume 33:Number 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-04-03
• Subjects: channel state information -- ergodic sum‐rate -- maximal ratio combining -- multiple‐input multiple‐output -- non‐orthogonal multiple access -- outage probability -- successive interference cancellation -- transmit antenna selection; Telecommunication systems -- Periodicals; 621.382
• DOI: 10.1002/dac.4405
• Languages: English
• ISSNs: 1074-5351

Abstract

Summary: In this paper, we examine a half‐duplex cooperative multiple‐input multiple‐output non‐orthogonal multiple access system with imperfect channel state information (CSI) and successive interference cancelation. The base station (BS) and mobile users with multi‐antenna communicate by the assistance of a CSI based or fixed gain amplify‐and‐forward (AF) relay with a single antenna. The diversity schemes, transmit antenna selection, and maximal ratio combining are applied at the BS and mobile users, respectively. We study the system performance in terms of outage probability (OP) and ergodic sum‐rate. Accordingly, the exact OP expressions are first derived jointly for the CSI based and fixed gain AF relay cases in Nakagami‐ m fading channels. Next, the corresponding lower and upper bound expressions of the OP are obtained. The high signal‐to‐noise ratio analyses are also carried out to demonstrate the error floor value resulted in the practical case and achievable diversity order and array gain in the ideal case. Moreover, the lower and upper bounds of the ergodic sum‐rate expressions are derived together for the CSI based and fixed gain AF relay cases. Finally, the Monte‐Carlo simulations are used to verify the correctness of the analytical results. Abstract : This paper includes Figure 1 for the system model and Figures 2‐12 for the numerical results. Note that Figures 2‐7 and 12 depict the performance of the system for imperfect CSI and perfect SIC. Figures 8 and 9 are devoted to perfect CSI and SIC and Figure 10 is for imperfect CSI and SIC.