Wideband dual-channel radio monitoring and receiving system and method for detecting signal

Abstract

The invention discloses a wide-band dual-channel radio monitoring and receiving system and a method for detecting signals. The system comprises a wide-band radio frequency front-end module which is connected with a short-wave antenna and an ultra-short-wave antenna, an A / D conversion module, a double-path two-stage DDC module, and an FIFO first-in first-out cache module; an intermediate frequency processing module is connected with a data storage module and an upper computer. The wide-band radio frequency front-end module comprises a short-wave channel and an over-short-wave channel, and is used for converting a received radio signal into an intermediate-frequency signal with the frequency of 70MHz and the bandwidth of 20MHz, and the upper computer is used for realizing frequency spectrum display, ITU measurement, recording and playback. The broadband radio frequency front-end module is adopted, short wave and ultra-short wave frequency bands are covered, the functions of equipment are expanded, the two independent signal receiving channels can monitor, analyze, record and play back received signals at the same time or respectively, and the utilization rate of the equipment and the monitoring accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of radio signal monitoring, in particular to a wide-band dual-channel radio monitoring receiving system and a method for detecting signals. Background technique [0002] After years of construction, the radio management departments of various provinces, cities and regions have realized the monitoring and management of radio in key areas of the region through fixed monitoring stations, small monitoring stations, mobile monitoring stations and movable monitoring stations, ensuring the radio order in the region. However, with the application of new technologies and the research and development of new devices, the existing domestic monitoring stations can also be improved and optimized to better complete radio monitoring tasks. [0003] At present, the radio spectrum monitoring receivers used by the radio management department are divided into short-wave receivers and ultra-short-wave receivers according to the ...

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Problems solved by technology

[0003] At present, the radio spectrum monitoring receivers used by the radio management department are divided into short-wave receivers and ultra-short-wave receivers according to the band. , in the occasions where shortwave and ultrashortwave frequency bands need to be monitored at the same time, two sets of equipment are often required, resulting in problems of high cost, large size, and inconvenient use

In addition, the existing receiver uses a single DDC processing channel to output baseband I and Q data streams, which are provided to the host computer monitoring software for spectrum display and measurement analysis. When multiple signals need to be monitored simultaneously, the existing equipment cannot meet the requirements.

After only one level of DDC processing, I and Q data streams of one bandwidth are output each time, and only one spectrogram is displayed in the spectrum display. In the signal analysis, it is impossible to have an intuitive understanding of the signal from both global and local

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