Instantaneous frequency measurement apparatus and measurement method

Abstract

The invention discloses an instantaneous frequency measurement apparatus and measurement method, and belongs to the technical field of instantaneous frequency measurement. The apparatus provided by the invention comprises a radio-frequency processing unit, a sampling and frequency mixing unit, an intermediate frequency processing unit, a digital channel processing unit and an operation unit. The real-time monitoring bandwidth implemented by the instantaneous frequency measurement apparatus and measurement method can be up to 26.5 GHz; real-time spectral analysis and instantaneous frequency demodulation are combined, so an instantaneous frequency test for multiple domains and multiple frequency bands is implemented, the requirements of the instantaneous frequency test on large monitoring bandwidth and high precision can be met, and the application range is wider; the implemented dynamic range and sensitivity are higher; with the intermediate frequency gain adaptive adjustment, the instantaneous frequency measurement requirements of different input power signals can be met, and the frequency measurement precision can also be improved; and the implementation scheme is concise, the circuit composition is simple, the technology is mature and high and the implementation cost is low, so the instantaneous frequency measurement apparatus and measurement method have the advantage of verygood cost performance.

Description

technical field [0001] The invention belongs to the technical field of instantaneous frequency measurement, and in particular relates to an instantaneous frequency measurement device and a measurement method. Background technique [0002] Instantaneous frequency measurement technology plays a very important role in modern electronic warfare. Extracting the instantaneous frequency information of radar from the radio frequency signal emitted by the enemy in a complex electromagnetic environment is one of the typical application scenarios of this technology. Using frequency information can Realize sorting, threat identification and jamming guidance for enemy radars. Instantaneous frequency measurement can be roughly divided into two categories according to the implementation method: analog instantaneous frequency measurement and digital instantaneous frequency measurement. The traditional analog instantaneous frequency measurement is limited by analog devices, and the accuracy ...

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Problems solved by technology

[0023] 1. The disadvantage of the interference phase comparison method is that it can only be applied to the case where the measured signal is a single carrier, otherwise it will lead to measurement errors

[0024] 2. The interferometric phase method cannot take into account the requirements of monitoring bandwidth and frequency resolution. The larger the delay time τ, the higher the frequency measurement accuracy and frequency resolution, but the smaller the maximum monitorable frequency is, which is inversely proportional to the delay time τ

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