An instantaneous frequency measuring device and measuring method

Abstract

The invention discloses an instantaneous frequency measurement device and a measurement method, which belong to the technical field of instantaneous frequency measurement. The device of the invention includes a radio frequency processing unit, a sampling mixing unit, an intermediate frequency processing unit, a digital channel processing unit and a computing unit. The real-time monitoring bandwidth realized by the present invention can reach 26.5 GHz. Combining real-time spectrum analysis and instantaneous frequency demodulation, it can realize multi-domain and multi-band instantaneous frequency testing, and can meet the requirements of large monitoring bandwidth and high-precision instantaneous frequency testing. The scope of application Wider; the realized dynamic range and sensitivity are higher, through the adaptive adjustment of intermediate frequency gain, it can meet the instantaneous frequency measurement requirements of different input power signals, and can also improve the frequency measurement accuracy; the implementation scheme is simple, the circuit structure is simple, and the technology High maturity, low implementation cost, and good cost performance advantages.

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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