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Repetition-based NOMA transmission and its outage probability analysis

journal contribution
posted on 2020-06-01, 00:00 authored by Jinho ChoiJinho Choi
In this paper, we discuss a non-orthogonal multiple access (NOMA) scheme to exploit a high diversity gain using repetition, namely repetition-based NOMA. Unlike conventional power-domain NOMA, all the users can have the same transmit power, but different number of repetitions. Thanks to a high diversity gain, a low outage probability can be achieved without instantaneous channel state information (CSI) feedback for power allocation. A closed-form expression for an upper-bound on the outage probability is derived so that the values of key parameters can be decided to maintain the outage probability below a target value. We also consider the average error probability for finite-length codes. Simulation results are compared with the derived bounds and it is shown that the bounds are reasonably tight and can be used to decide key parameters (e.g., code rates) to guarantee target error probabilities.

History

Journal

IEEE transactions on vehicular technology

Volume

69

Issue

6

Pagination

5913 - 5922

Publisher

IEEE

Location

Piscataway, N.J.

ISSN

0018-9545

eISSN

1939-9359

Language

eng

Publication classification

C1 Refereed article in a scholarly journal