Software-Defined Radio-Based IEEE 802.15.4 SUN OFDM Evaluation Platform for Highly Mobile Environments

IF 5.3 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Open Journal of Vehicular Technology Pub Date : 2023-11-28 DOI:10.1109/OJVT.2023.3337315
Keito Nakura;Shota Mori;Hiroko Masaki;Hiroshi Harada
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Abstract

Next-generation Internet of Things (IoT) systems require faster data transmission, support for moving objects, and long-distance transmission when compared to the currently available IoT systems. The IEEE 802.15.4 smart utility network (SUN) orthogonal frequency-division multiplexing (OFDM) can satisfy these requirements. Mobile-communication-oriented receiver systems are typically used in urban environments for SUN OFDM. However, the evaluation depends on computer simulations and requires an experimental evaluation platform based on software-defined radio (SDR) that can modify transmitter-receiver functions. We present a platform for SUN OFDM that enables high-speed mobile communication. The proposed platform comprises a signal generator-based transmitter and an SDR-based receiver; the receiver baseband signal processing is performed by MATLAB. We also proposed signal processing functions that can receive the SUN OFDM packets even at speeds of tens of km/h. We applied a simplified universal time-domain windowed (UTW)-OFDM scheme to this platform to operate even at sub-1 GHz, where the spectrum mask is more limited. In the experimental evaluation, the required packet error rate for SUN OFDM was achieved in an 80 km/h multipath fading environment, and out-of-band emission can be suppressed by over 43 dB from the peak power while achieving performance equivalent to that without applying the simplified UTW.
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基于软件定义无线电的 IEEE 802.15.4 SUN OFDM 评估平台,适用于高度移动环境
与目前可用的物联网系统相比,下一代物联网(IoT)系统需要更快的数据传输、支持移动物体和长距离传输。IEEE 802.15.4 智能公用事业网络(SUN)正交频分复用(OFDM)可满足这些要求。面向移动通信的接收器系统通常用于城市环境中的 SUN OFDM。然而,评估依赖于计算机模拟,需要一个基于软件定义无线电(SDR)的实验评估平台,该平台可修改发射机-接收机功能。我们提出了一个可实现高速移动通信的 SUN OFDM 平台。所提议的平台包括一个基于信号发生器的发射器和一个基于 SDR 的接收器;接收器的基带信号处理由 MATLAB 完成。我们还提出了信号处理功能,即使在几十公里/小时的速度下也能接收 SUN OFDM 数据包。我们将简化的通用时域窗口(UTW)-OFDM 方案应用于该平台,即使在频谱掩码较为有限的 1 GHz 以下频率也能运行。在实验评估中,SUN OFDM 在 80 km/h 的多径衰落环境中达到了所需的数据包错误率,带外发射的峰值功率被抑制了 43 dB 以上,性能与未应用简化 UTW 时的性能相当。
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来源期刊
CiteScore
9.60
自引率
0.00%
发文量
25
审稿时长
10 weeks
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