BACKGROUND Acute cancrum oris (NOMA) is a major health concern in most parts of northern Nigeria, affecting children aged 2-9 years. The management of the acute phase/condition poses a great clinical challenge. We present our protocol for the management of acute NOMA in a referral health facility in northern Nigeria. MATERIALS AND METHODS The management of five consecutive children with acute...

Non-orthogonal multiple access (NOMA) is a promising technique for future mobile communication systems, which can approach multiuser channel capacity by sharing the same time-frequency resources with multiple users. In this article, we provide a unified framework for NOMA and review the principles of various NOMA schemes in different domains with the objective of creating a unified framework. A...

The achievable rate of an Opportunistic NonOrthogonal Multiple Access (O-NOMA) based Cooperative Relaying System (CRS) with Channel State Information (CSI) available at the transmitter end is analyzed under Rician fading channels. It is shown that, O-NOMA-based CRS achieves a better achievable rate than Conventional-NOMA-based CRS and results are verified through Monte Carlo simulations. Keywor...

Wireless powered communication networks (WPCNs), where multiple energy-limited devices first harvest energy in the downlink and then transmit information in the uplink, have been envisioned as a promising solution for the future Internet-of-Things (IoT). Meanwhile, non-orthogonal multiple access (NOMA) has been proposed to improve the system spectral efficiency (SE) of the fifth-generation (5G)...

We outline a general framework to use coordinated multi-point (CoMP) transmission technology in downlink multicell non-orthogonal multiple access (NOMA) systems considering distributed power allocation at each cell. In this framework, CoMP transmission is used for users experiencing strong receivesignals from multiple cells while each cell adopts NOMA for resource allocation to its active users...

This work introduces downlink non-orthogonal multiple access (NOMA) into short-packet communications. NOMA has great potential to improve fairness and spectral efficiency with respect to orthogonal multiple access (OMA) for lowlatency downlink transmission, thus making it attractive for the emerging Internet of Things. We consider a two-user downlink NOMA system with finite blocklength constrai...

Non-orthogonal multiple access (NOMA) has attracted much recent attention owing to its capability for improving the system spectral efficiency in wireless communications. Deploying NOMA in heterogeneous network can satisfy users’ explosive data traffic requirements, and NOMA will likely play an important role in the fifth-generation (5G) mobile communication networks. However, NOMA brings new t...

Non-Orthogonal Multiple Access (NOMA) has been proposed to enhance the Spectrum Efficiency (SE) and celledge capacity. This paper considers the massive Multi-Input Multi-Output (MIMO) with Non-Orthogonal Multiple Access (NOMA) encoding. The close-form expression of capacity of the massive MIMO with NOMA is given here. Apart from the previous Successive Interference Cancellation (SIC) method, th...

In this letter, the performance of non-orthogonal multiple access (NOMA) is investigated from an information theoretic perspective. The relationships among the capacity region of broadcast channels and two rate regions achieved by NOMA and time-division multiple access (TDMA) are illustrated first. Then, the performance of NOMA is evaluated by considering TDMA as the benchmark, where both the s...

Fresh noma is a severe orofacial necrosis with an astonishingly rapid development. It is seen mainly in malnourished children less than 4 years old from developing countries. Cytokines play a central role in oral mucosal inflammation. We therefore studied the relevance of circulating cytokines to noma, and the key microorganisms associated with the lesion. Nigerian village children with acute n...