On Multiple Access Using H-ARQ with SIC Techniques for Wireless Ad Hoc Networks

In this paper, we consider non-orthogonal multiple access (NOMA) for wireless ad hoc networks over block fading channels where the performance is limited by interference and fading. In order to provide a reasonable performance, we can use re-transmission and interference cancellation techniques. Re-transmission techniques can provide a diversity gain over fading channels, while the successive interference cancellation (SIC) can improve the signal to interference ratio (SIR). Using the information outage probability, we show that the NOMA approach with re-transmissions can perform better than the orthogonal multiple access (OMA) approach with re-transmissions when the signal to noise ratio (SNR) is low. It is also shown that the outage probability of the NOMA with SIC is lower than that of OMA when the rate is sufficiently low where SIC can be facilitated.

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