Fast identification device for continuous wave and pulse signals

Abstract

The invention discloses a fast identification device for a continuous wave and pulse signals, which can quickly identify continuous wave modulated signals and pulse signals such as AM, FM, BPSK, QPSK,OQPSK, 2FSK, etc. The invention is realized by the following technical scheme: the FPGA preprocessing module constructs a calculation model to complete the real-time preprocessing of the digital signal, and transmits a plurality of high-order spectral components and characteristic parameters calculated in parallel to the digital signal processor DSP. the FPGA preprocessing module realizes the real-time preprocessing of the digital signal. When the DSP receives the preprocessed FPGA, frequency domain data, At that time of calculation, the characteristic parameter in the frequency domain, A tree classifier is designed based on the time and frequency domain characteristic parameters of the pulse signal. A group of time and frequency domain characteristic parameters are extracted from the high order spectral components of the pulse signal or the continuous wave signal and the time domain IQ data. The modulation patterns of the input signal are judged according to the pulse attributes, andthe parameters of the continuous wave and the pulse signal are identified and measured.

Description

technical field [0001] The invention relates to a monitoring frequency range applicable to mobile communication radio monitoring systems, gridded radio monitoring systems, fixed monitoring direction finding systems, radio monitoring equipment, spectrum monitoring, and radio resource management, which can identify FM, AM, 2FSK, Identification device that modulates signals by various analog and digital modulation methods such as BPSK, QPSK, and OQPSK. Background technique [0002] Many signals in the field of radar and communication have pulse characteristics. Most surveillance radars use coherent pulse train waveforms. The widely used link16 data link also appears in the form of pulse signals at each frequency hopping point. In the increasingly complex and high-density electromagnetic environment, the signal systems of radar and communication are getting closer and closer, and the signals are continuously integrated in time, frequency and space. In the detection bandwidth of ...

AI Technical Summary

Problems solved by technology

However, most of the algorithms usually work robustly on the premise of a high signal-to-noise ratio or the need to extract more complex feature parameters.

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