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ARQ: The Gateway from NOMA to NOM

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posted on 2020-10-30, 15:15 authored by Arafat Al-DweikArafat Al-Dweik, Youssef Iraqi
This work presents a new framework that utilizes
power-domain (PD) nonorthogonal multiple access (NOMA) as a multiplexing scheme to improve the throughput of point-to-point (P2P), or single user, communications. The proposed framework synergizes PD-NOMA and automatic repeat request (ARQ) to enable multiplexing and transmitting multiple packets that belong to the same user simultaneously. To overcome channel estimation and feedback limitations, and to reduce the system complexity, a simple adaptation scheme is proposed select the
appropriate number packets to be transmitted within a given
transmission slot. Moreover, the number of transmitted packets
is limited to a maximum of two to allow the receiver to blindly
identify the number of transmitted packets in a particular
transmission slot. The obtained results show that the proposed
NOM scheme can eventually double the system throughput at
high signal-to-noise ratios (SNRs), and hence, reduce the delay
by 50%. The system complexity and overhead are generally
comparable to conventional ARQ systems.


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Submitting Author's Institution

Khalifa University

Submitting Author's Country

  • United Arab Emirates