Energy-Efficient Spectral Analysis Method Using Autoregressive Model-Based Approach for Internet of Things
Energy-Efficient Spectral Analysis Method Using Autoregressive Model-Based Approach for Internet of Things
复制标题
使用基于自回归模型的物联网方法的节能频谱分析方法
DOI:
10.1109/tcsi.2019.2922990
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Yoshimoto Masahiko
中科院分区:
文献类型:
--
作者:
Yoshida Seiya;Izumi Shintaro;Kajihara Koichi;Yano Yuji;Kawaguchi Hiroshi;Yoshimoto Masahiko
This paper presents an energy-efficient spectral analysis method for the Internet of Things (IoT). The objective of this paper is to reduce the energy consumption of edge devices. The proposed method uses an autoregressive (AR) model for spectral analysis instead of the discrete Fourier transform, and its calculation process is distributed to the edge device and a base station by considering the energy consumption tradeoff of the data processing and the data communication. In this paper, the Yule-Walker method is employed for the AR coefficient calculation. The calculation process of Yule-Walker method can be divided into two parts: an autocorrelation calculation and an AR coefficient calculation. The autocorrelation calculation is implemented in the edge devices, and its dedicated hardware is designed using Verilog HDL. Meanwhile, the AR coefficient is calculated in the base station and is used for the spectral analysis. According to this distributed processing approach, the energy consumption of the edge device can be reduced compared with conventional DFT approaches using the fast Fourier transform (FFT). The system level energy consumption is evaluated assuming the IoT edge device, which has a wireless transceiver using Bluetooth low energy. The evaluation results show that the proposed method can reduce 79% of the edge device energy consumption for spectral analysis in a practical application.
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