Intra-pulse modulation type parameter extraction system and use method

Abstract

The invention relates to an intra-pulse modulation type parameter extraction system and a use method, and belongs to the technical field of radar signal parameter calibration, and the system comprises a digital channelization module, an instantaneous frequency measurement module, an intra-pulse modulation type parameter extraction module and a radiation source information module; the intra-pulse modulation type parameter extraction system is based on a joint algorithm of digital channelization and instantaneous frequency measurement, the number of channels is D, a digital channelization module comprises D-time decimation filtering and over-threshold detection, and an instantaneous frequency measurement module comprises instantaneous frequency measurement, basic parameter measurement and PDW. Signals output after intermediate frequency data are subjected to D-time decimation filtering are subjected to over-threshold detection screening to obtain a frequency range of the signals, instantaneous frequency measurement is performed in the instantaneous frequency measurement module to obtain an accurate frequency value, basic parameter measurement is performed to obtain arrival time, arrival angle, amplitude and pulse width parameters, and complete pulse description word output is formed through encoding; therefore, the problems of high signal-to-noise ratio, high measurement precision and large operand required in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of radar signal parameter calibration, in particular to an intrapulse modulation type parameter extraction system and usage method. Background technique [0002] With the rapid development of radar technology, the use of conventional radar signals in the electromagnetic environment is less and less, and new system radars continue to emerge, based on the five parameters of radar arrival direction, arrival time, carrier frequency, pulse width and amplitude. Sorting and identification have become very difficult and cannot meet operational needs, and the identification of intrapulse features of radar signals has become extremely urgent. [0003] At present, the methods for extracting intrapulse modulation type parameters mainly include: time-domain autocorrelation, modulation domain analysis, and time-sequence cepstrum. The measurement accuracy of the phase is required to be high, the amount of calculation is l...

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Problems solved by technology

[0004] The present invention provides a system and method for extracting intra-pulse modulation type parameters. The purpose is to solve the problem of high signal-to-noise ratio, high measurement accuracy requirements for signal amplitude and phase, and large amount of computation when extracting intra-pulse modulation type parameters in the prior art. Problems that are not easy to implement

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