Abstract-In this letter, the performance of non-orthogonal multiple access (NOMA) is investigated in a cellular downlink scenario with randomly deployed users. The developed analytical results show that NOMA can achieve superior performance in terms of ergodic sum rates; however, the outage performance of NOMA depends critically on the choices of the users' targeted data rates and allocated power. In particular, a wrong choice of the targeted data rates and allocated power can lead to a situation in which the user's outage probability is always one, i.e. the user's targeted quality of service will never be met.
As for the DL, NOMA was demonstrated to achieve superior performance in terms of ergodic sum rate of a cellular network with randomly deployed users in REF .
On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed Users
IEEE Signal Processing Letters
IEEE Signal Processing Letters
Computer Science Mathematics