System and method for simultaneously monitoring plurality of physical channels in broadband micropower

Abstract

The invention discloses a system and a method for simultaneously monitoring a plurality of physical channels in broadband micropower, and belongs to the field of Internet of Things. The system comprises an analog radio frequency module, an A / D sampler module and a digital baseband processing module, the analog radio frequency module is used for receiving the whole bandwidth of a plurality of physical channels, determining a radio frequency center frequency point and a radio frequency bandwidth, and performing down-conversion processing on a received radio frequency signal to obtain an analog baseband signal; the A / D sampler module is used for completing conversion from an analog baseband signal to a digital baseband signal, and a sampling clock of the A / D sampler meets the sampling theoremrequirement; digital baseband processing module, wherein the receiving module is used for firstly carrying out fast Fourier transform on a digital baseband signal to obtain frequency domain information of the whole bandwidth of a receiving channel, then dividing the whole channel bandwidth into corresponding physical channel bandwidths according to the definition of the physical channel bandwidths, finally carrying out frame header detection on a physical channel with a signal, and interpreting the content of a frame data volume.

Description

technical field [0001] The invention belongs to the field of Internet of Things communication, in particular to a method for scanning and monitoring multiple physical channels by an Internet of Things terminal. Background technique [0002] In the field of Internet of Things communication, due to the wide range of applications, the relatively small amount of communication business data, and the current shortage of spectrum resources, it is difficult to allocate a fixed frequency band that can be occupied for a long time in the Internet of Things system for networking. Therefore, in the Internet of Things communication In general, only the shared frequency band can be used, that is, multiple systems share a common frequency band, also known as the ISM frequency band. The PLC broadband micropower wireless communication system is a typical system that uses the ISM frequency band, occupying the 470MHz to 510MHz frequency band, where there are LoRa systems, short-wave FM and amat...

AI Technical Summary

Problems solved by technology

This reduces the wireless resource utilization rate of the Internet of Things, and is not conducive to improving the transmission rate and throughput of the Internet of Things system, which limits the promotion and application of the wireless Internet of Things system

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