Non-linear target harmonic detection method based on noise frequency modulation technology
A harmonic detection and nonlinear technology, which is applied in the field of harmonic detection of short-distance nonlinear targets, can solve the problems of false alarms of equipment, poor anti-electromagnetic interference performance, and inability to obtain time gain for received signals, and achieves wide application fields and detection The effect of high sensitivity
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[0031] A non-linear target harmonic detection method based on noise frequency modulation technology, including the following steps:
[0032] S1: Generate a noise sequence;
[0033] S2: Frequency modulate the noise sequence to generate a harmonic radar transmission signal, which is sent through the transmitting antenna;
[0034] S3: The receiving antenna receives the signal, and performs band-pass filtering on the signal in the frequency band corresponding to the double frequency and the triple frequency to improve the signal-to-noise ratio of the received signal, and obtain the measured signal of the double frequency and the triple frequency;
[0035] S4: Simultaneously perform double frequency and triple frequency modulation on the noise sequence in step S1 to generate the original copy signal of the harmonic radar, that is, the double frequency and triple frequency production signal;
[0036] S5: Perform matched filtering on the double-frequency and triple-frequency pr...
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