The existence of inter-numerology interference (INI) is a major drawback for the flexible multi-numerology frame structure proposed for the upcoming fifth generation New Radio (5G-NR). Insertion of a guard band (GB) between adjacent numerologies has been widely used in the literature as one of the effective ways to reduce the INI. However, the conventional way of implementing GBs is inefficient in terms of spectrum usage. In this letter, we exploit the inherent INI characteristics of the scalable multi-numerology structure to propose a more spectrally efficient way of implementing GBs. It is shown through simulations that the proposed GB insertion technique enhances the GB utilization up to 50% while achieving the same bit error rate performance as the conventionally implemented GB.

中文翻译：

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减少 5G 及以后的保护频带

参数间干扰 (INI) 的存在是为即将到来的第五代新无线电 (5G-NR) 提出的灵活多参数框架结构的主要缺点。在相邻数字学之间插入保护带 (GB) 已在文献中广泛用作减少 INI 的有效方法之一。然而，实施GB的传统方式在频谱使用方面效率低下。在这封信中，我们利用可扩展的多数值结构的固有 INI 特性来提出一种更高效的实现 GB 的方法。通过仿真表明，所提出的 GB 插入技术将 GB 利用率提高了 50%，同时实现了与传统实现的 GB 相同的误码率性能。