标题： 非正交多址接入与重复叠加多址的调制与编码 显示英文标题

标题： Modulation and Coding for NOMA and RSMA

摘要： 下一代多址接入（NGMA）是一个总称，用于描述与传统正交方法不同的传输方案。 NGMA的一个关键候选方案是非正交多址接入（NOMA），它作为一种解决方案出现，通过允许多个用户同时共享时间、频率和空间来增强连接性。 然而，NOMA在实现中面临挑战，特别是在消除用户间干扰方面。 在本文中，我们讨论NOMA背后的原理并回顾传统的NOMA方法。 然后，为了解决这些挑战，我们提出异步传输和干扰感知调制技术，使得在无需连续干扰消除的情况下进行解码成为可能。 目标是设计能够动态适应干扰的星座图，在存在用户间、载波间和小区间干扰的情况下，最小化误比特率（BER）并提高用户吞吐量。 探讨了最小化BER和提高频谱效率之间的传统联系，端到端通信中的深度自编码器被提出作为改善BER的潜在解决方案。 干扰感知调制可以革新非正交信道的星座设计。 速率分割多址接入（RSMA）是多用户系统中另一种有前途的干扰管理技术。 除了应对有限字母NOMA的挑战外，本文还提供了新的见解，并概述了码域NOMA、网格编码NOMA和RSMA作为关键的NGMA候选方案。 我们还讨论了信道编码向低时延通信的演变，并研究了5G网络中的调制和编码方案。 最后，我们强调了未来的研究方向，强调它们对于将NOMA从概念转化为实用技术的重要性。 显示英文摘要

摘要： Next-generation multiple access (NGMA) serves as an umbrella term for transmission schemes distinct from conventional orthogonal methods. A key candidate of NGMA, non-orthogonal multiple access (NOMA), emerges as a solution to enhance connectivity by allowing multiple users to share time, frequency, and space concurrently. However, NOMA faces challenges in implementation, particularly in canceling inter-user interference. In this paper, we discuss the principles behind NOMA and review conventional NOMA methods. Then, to address these challenges, we present asynchronous transmission and interference-aware modulation techniques, enabling decoding without successive interference cancellation. The goal is to design constellations that dynamically adapt to interference, minimizing bit error rates (BERs) and enhancing user throughput in the presence of inter-user, inter-carrier, and inter-cell interference. The traditional link between minimizing BER and increasing spectral efficiency is explored, with deep autoencoders for end-to-end communication emerging as a potential solution to improve BERs. Interference-aware modulation can revolutionize constellation design for non-orthogonal channels. Rate-splitting multiple access (RSMA) is another promising interference management technique in multi-user systems. In addition to addressing challenges in finite-alphabet NOMA, this paper offers new insights and provides an overview of code-domain NOMA, trellis-coded NOMA, and RSMA as key NGMA candidates. We also discuss the evolution of channel coding toward low-latency communication and examine modulation and coding schemes in 5G networks. Finally, we highlight future research directions, emphasizing their importance for realizing NOMA from concept to functional technology.