论文标题
一种有效的技术，可提高容量和改善5G NB-iot的带宽
An Effective Technique for Increasing Capacity and Improving Bandwidth in 5G NB-IoT
论文作者
论文摘要
对于研究人员而言，具有数百十亿个物联网连接的设备，创建有效的资源管理方法以满足第五代（5G）及以后的服务质量（QoS）要求很重要。此外，随着对无线服务的需求的发展，无线频谱越来越稀缺，要求富有想象力的方法增加有限光谱资源中的容量以满足服务需求。在本文中，建议修改的符号时间压缩（M-STC）技术为5G网络及其他地区铺平道路，以增强容量和吞吐量。 M-STC方法是一种压缩信号波形技术，它通过压缩占用带宽而不增加复杂性，丢失数据吞吐量或位错误率（BER）性能来增加容量。使用常规符号时间压缩（C-STC-OFDM）（C-STC-OFDM）和使用建议的技术（M-STC-OFDM），在传统的正交频施加多路复用（OFDM）系统，OFDM之间提供了比较分析。使用MATLAB-2021A的仿真结果表明，建议的方法M-STC-OFDM大幅度降低了每个OFDM信号所需的时间75％。结果，与标准的OFDM系统（BW_OFDM = 180 kHz和BW_M-STC-OFDM = 45 kHz）相比，M-STC-OFDM系统将带宽（BW）降低了75％，而C-STC-ofdm System BW将BW降低了50％（BW_C-STC-STC-STC-STC OFDM = 90 KHZ）。此外，与标准OFDM系统相比，使用M-STC-OFDM系统将峰值降低到平均功率比率（PAPR），而与C-STC-OFDM相比，峰值将峰值降低为2.09 dB，而C-STC-OFDM则没有降低。此外，与16QAM-OFDM系统相比，提出的M-STC-OFDM系统将信号到噪声比例（SNR）降低了3.8 dB，以传输相同数量的数据。
With hundreds of billions of the IoT connected devices, it is important for researchers to create effective resource management approach to satisfy the quality of service (QoS) requirements of 5th generation (5G) and beyond. Furthermore, wireless spectrum is increasingly scarce as demand for wireless services develops, demanding imaginative approaches to increase capacity within a limited spectral resource in order to meet service demands. In this article, the modified symbol time compression (M-STC) technique is suggested to paves the way for 5G networks and beyond to enhance the capacity and throughput. The M-STC method is a compressed signal waveform technique that increases the capacity by compressing the occupied bandwidth without increasing the complexity, losing data throughput or bit error rate (BER) performance. A comparative analysis is provided between the traditional orthogonal frequency division multiplexing (OFDM) system, OFDM using conventional symbol time compression (C-STC-OFDM) and OFDM using the proposed technique (M-STC-OFDM). The simulation results using Matlab-2021a show that the suggested method, M-STC-OFDM, drastically lowers the time needed for each OFDM signal by 75%. As a consequence, the M-STC-OFDM system decreases bandwidth (BW) by 75% when compared to a standard OFDM system (BW_OFDM = 180 kHz and BW_M-STC-OFDM = 45 kHz), while the C-STC-OFDM system reduces BW by 50% (BW_C-STC-OFDM = 90 kHz). Furthermore, using the M-STC-OFDM system reduces peak to average-power-ratio (PAPR) by 2.09 dB when compared to the standard OFDM system and 1.18 dB when compared to C-STC-OFDM with no BER deterioration. Moreover, as compared to the 16QAM-OFDM system, the proposed M-STC-OFDM system reduces the signal-to-noise-ratio (SNR) by 3.8 dB to transmit the same amount of data.
