Radio frequency panoramic scanning circuit of receiver

Abstract

The invention discloses a radio frequency panoramic scanning circuit of a receiver, specifically relates to the technical field of radio frequency panoramic scanning of the receiver and solves the defect that the radio frequency panoramic scanning in the prior art cannot give consideration to the scanning speed, scanning width and resolution bandwidth at the same time. The radio frequency panoramic scanning circuit of the receiver comprises a radio frequency conversion unit, an intermediate frequency gain unit, an analog to digital converter, a storage unit, an FFT analysis unit, an FFT frequency spectrum storage unit, a scanning controller, a scanning control data storage unit and a delay counter. The radio frequency conversion unit, the intermediate frequency gain unit, the analog to digital converter, the storage unit, the FFT analysis unit, the FFT frequency spectrum storage unit and the scanning controller are connected in sequence. The scanning control data storage unit is respectively connected with the radio frequency conversion unit, the intermediate frequency gain unit, the analog to digital converter, the storage unit and the FFT analysis unit. The scanning controller is connected with the scanning control data storage unit. The delay counter is connected with the scanning control data storage unit and the scanning controller.

Description

technical field [0001] The invention belongs to the technical field of radio frequency panoramic scanning of receivers, and in particular relates to a radio frequency panoramic scanning circuit of a receiver. Background technique [0002] Receivers are devices used to process radio signals, including test receivers, spectrum analyzers, monitoring receivers, etc. Radio frequency panoramic scanning is the core function of the receiver, which is used to search and intercept the spectrum of the target radio signal and extract the characteristic parameters of the target radio signal. One of the main indicators of RF panoramic scanning is scanning speed. [0003] Receivers are mainly divided into heterodyne analog IF receivers and heterodyne digital IF receivers according to their implementation. [0004] In the heterodyne analog IF receiver, the input signal is frequency-differenced with the local oscillator signal in the mixer. Only when the frequency of the difference-frequen...

AI Technical Summary

Problems solved by technology

[0008] For RF panoramic scanning, when scanning with a large scanning bandwidth, it is necessary to scan and detect point by point to obtain spectrum data. The resolution bandwidth is large. When the resolution bandwidth is small, the scanning speed is very slow. When scanning with a small scanning bandwidth, FFT analysis directly obtains all points. For spectral data, the resolution bandwidth is small and the scanning speed is fast, but the scanning bandwidth is limited, so the scanning speed, scanning bandwidth and resolution bandwidth cannot be considered

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