Energy Detection Based Carrier Sense in Sub-GHz Band LPWANs and Its Characteristics

Abstract

Sub-GHz band low-power wide-area networks (LPWANs) are expected as wireless communication infrastructure for Internet of Things (IoT) systems. Both theoretically and experimentally, we have analyzed and evaluated the characteristics of the energy detection based carrier sense that can achieve low carrier sense levels for the improvement in sub-GHz band LPWANs. As a result, it has been shown that energy detection for carrier sense detects interference packets with power below the noise floor and significantly improves the characteristics of sub-GHz band LPWANs compared to with conventional peak detection for carrier sense. In this paper, we describe the fundamental characteristics of the energy detection based-carrier sense in sub-GHz band LPWANs using our previous analysis results, which are characteristics of the energy detection based carrier sense, characteristics of sub-GHz band LPWANs with the energy detection based carrier sense, and effects of signal detection parameters, such as target false alarm probability, on the performance of sub-GHz band LPWANs with the energy detection based carrier sense.