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Performance of Outage Probability and Ergodic Sum Rate for Two-User Paired NOMA Downlink System

Non-Orthogonal Multiple Access (NOMA) is a technique to support a massive number of users to access the radio resources simultaneously and frequently. Existing conventional multiple access has been exhausting and insufficient for providing physical layer services in fifth Generation (5G) cellular systems. The user-pairing principle is adapted to resolve this issue that fulfils the maximum sum rate and channel utility. But it is lacking when a user with a near gain enters a user pair. Therefore, this paper considers a single pair occupying two different gain users who understand practical circumstances by evaluating outage probability using the stochastic geometry method. The paired users will calculate the ergodic sum rate and calculates the closed-loop solution for the outrage probability. The outage probability performance is obtained between NOMA paired users and the traditional multiple access approaches.