Energy-Efficient Downlink NOMA Transmission Enabled by Continuous Phase Modulation

IF 3.7 3区计算机科学 Q2 TELECOMMUNICATIONS

IEEE Communications Letters Pub Date : 2024-12-04 DOI:10.1109/LCOMM.2024.3510727

Sai Li;Xiaoyu Dang;Xiangbin Yu;Jie Li;Yunhang Lin;Beien Cheng

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Abstract

In this letter, we present a power-efficient downlink non-orthogonal multiple access (NOMA) enabled by continuous phase modulation (CPM), which improves the efficiency of the transmitter’s power amplifier (PA) by exploiting a low peak-to-average power ratio (PAPR), thereby achieving power-efficient downlink transmission. First, the system model is established. Then, we investigate the PAPR, spectral efficiency, bit-error-rate (BER) performance with/without nonlinear distortions and computational complexity, and the conventional scheme is also provided as a benchmark. The numerical results show that CPM-NOMA can achieve about

$3\sim 6$

(dB) PAPR performance gain compared to conventional schemes. In the absence of nonlinear distortions, CPM-NOMA can obtain comparable or even better BER performance than conventional schemes with similar computational complexity. In the presence of nonlinear distortions, CPM-NOMA can offer robust and power-efficient downlink transmission with smaller PAPR and BER performance losses, and is also suitable for efficient PAs, but not for conventional schemes. Finally, CPM-NOMA can also achieve the trade-off between spectral efficiency, power efficiency and BER.

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通过连续相位调制实现节能下行链路NOMA传输

在这封信中，我们提出了一种由连续相位调制（CPM）实现的节能下行链路非正交多址（NOMA），它通过利用低峰均功率比（PAPR）提高了发射机功率放大器（PA）的效率，从而实现了节能下行传输。首先，建立了系统模型。然后，我们研究了在有无非线性失真和计算复杂度的情况下的PAPR、频谱效率、误码率（BER）性能，并提供了常规方案作为基准。数值结果表明，与传统方案相比，CPM-NOMA方案可获得约$3\sim 6$ （dB）的PAPR性能增益。在不存在非线性失真的情况下，CPM-NOMA在计算复杂度相似的情况下可以获得与传统方案相当甚至更好的误码率性能。在存在非线性失真的情况下，CPM-NOMA可以提供鲁棒和节能的下行传输，具有较小的PAPR和BER性能损失，并且也适用于高效的pa，但不适用于传统方案。最后，CPM-NOMA还可以实现频谱效率、功率效率和误码率之间的权衡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Communications Letters 工程技术-电信学

CiteScore

8.10

自引率

7.30%

发文量

590

审稿时长

2.8 months

期刊介绍： The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.