Adarsh Abhinav, Pathak Shashwat, Chauhan Digvijay Singh, Kumar Basant
Department of ECE, Madanapalle Institute of Technology and Science, Madanapalle, 517325 India.
Department of ECE, MIET, Meerut, 250005 India.
J Supercomput. 2023;79(4):3643-3665. doi: 10.1007/s11227-022-04799-4. Epub 2022 Sep 7.
This paper presents a prototype filter design using the orthant optimization technique to assist a filter bank multicarrier (FBMC) modulation scheme of a NextG smart e-healthcare network framework. Low latency and very high reliability are one of the main requirements of a real-time e-healthcare system. In recent times, FBMC modulation has gotten more attention due to its spectral efficiency. The characteristics of a filter bank are determined by t's, prototype filter. A prototype filter cannot be designed to achieve an arbitrary time localization (for low latency) and frequency localization (spectral efficiency), as time and frequency spreading are conflicting goals. Hence, an optimum design needed to be achieved. In this paper, a constraint for perfect or nearly perfect reconstruction is formulated for prototype filter design and an orthant-based enriched sparse ℓ1-optimization method is applied to achieve the optimum performance in terms of higher availability of subcarrier spacing for the given requirement of signal-to-interference ratio. Larger subcarrier spacing ensures lower latency and better performance in real-time applications. The proposed FBMC system, based on an optimum design of the prototype filter, also supports a higher data rate as compared to traditional FBMC and OFDM systems, which is another requirement of real-time communication. In this paper, the solution for the different technical issues of physical layer design is provided. The presented modulation scheme through the proposed prototype filter-based FBMC can suppress the side lobe energy of the constituted filters up to large extent without compromising the recovery of the signal at the receiver end. The proposed system provides very high spectral efficiency; it can sacrifice large guard band frequencies to increase the subcarrier spacing to provide low-latency communication to support the real-time e-healthcare network.
本文提出了一种使用象限优化技术的原型滤波器设计，以辅助下一代智能电子医疗网络框架的滤波器组多载波（FBMC）调制方案。低延迟和非常高的可靠性是实时电子医疗系统的主要要求之一。近年来，FBMC调制因其频谱效率而受到更多关注。滤波器组的特性由其原型滤波器决定。由于时间扩展和频率扩展是相互冲突的目标，因此无法设计出一个能同时实现任意时间定位（低延迟）和频率定位（频谱效率）的原型滤波器。因此，需要实现一种优化设计。本文针对原型滤波器设计制定了完美或近乎完美重构的约束条件，并应用基于象限的增强稀疏ℓ1优化方法，以在给定的信噪比要求下，实现更高子载波间隔可用性方面的最佳性能。更大的子载波间隔可确保在实时应用中具有更低的延迟和更好的性能。与传统的FBMC和OFDM系统相比，基于原型滤波器优化设计的所提出的FBMC系统还支持更高的数据速率，这是实时通信的另一项要求。本文提供了物理层设计中不同技术问题的解决方案。通过所提出的基于原型滤波器的FBMC呈现的调制方案可以在很大程度上抑制构成滤波器的旁瓣能量，而不会影响接收机端信号的恢复。所提出的系统具有非常高的频谱效率；它可以牺牲大量的保护带频率来增加子载波间隔，以提供低延迟通信，从而支持实时电子医疗网络。
