Downlink Asynchronous Non-Orthogonal Multiple Access with Quantizer Optimization

Xun Zou; Mehdi Ganji; Hamid Jafarkhani

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arXiv · 2005.13403

Downlink Asynchronous Non-Orthogonal Multiple Access with Quantizer Optimization

Xun Zou·Mehdi Ganji·Hamid Jafarkhani

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Abstract

In this letter, we study a two-user downlink asynchronous non-orthogonal multiple access (ANOMA) with limited feedback. We employ the max-min criterion for the power allocation and derive the closed-form expressions for the upper and lower bounds of the max-min rate. It is demonstrated that ANOMA can achieve the same or even higher average maxmin rate with a lower feedback rate compared with NOMA. Moreover, we propose a quantizer optimization algorithm which applies to both NOMA and ANOMA. Simulation results show that the optimized quantizer significantly improves the average max-min rate compared with the conventional uniform quantizer, especially in the scenario with a low feedback rate.

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Xun Zou, Mehdi Ganji, Hamid Jafarkhani. 2020-05-27. Downlink Asynchronous Non-Orthogonal Multiple Access with Quantizer Optimization. https://arxiv.org/abs/2005.13403

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