Method and system for generating broadband chaos radar signals with carrier frequency jumping randomly

A technology of radar signal and generation method, applied in radio wave measurement systems, instruments, etc., can solve the problems of step frequency noise signal suppression interference, step frequency Chirp signal deception interference and suppression interference and other problems
CN104777461AInactive Publication Date: 2015-07-15NAT SPACE SCI CENT CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAT SPACE SCI CENT CAS
Publication Date
2015-07-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and system for generating broadband chaos radar signals with carrier frequency jumping randomly. The method comprises the steps of (101) inputting baseband signals, (102) generating combinatorial mapping sequences, then generating carrier frequency hopping codes through the combinatorial mapping sequences, and (103) selecting carrier frequency signals according to the generated carrier frequency hopping codes, carrying out up conversion on the baseband signals to obtain the broadband chaos radar signals. The broadband chaos radar signals with the carrier frequency jumping randomly is composed of a string of sub pulse signals with carrier frequency jumping randomly, and each sub pulse adopts narrow-band chaos signals as baseband signals. The radar signals generated by the method and system have quite large bandwidth, and therefore quite high range resolution can be obtained. Meanwhile, due to the fact that the carrier frequency can jump randomly, the chaos signals are adopted as the baseband signals, the radar signals have quite excellent low detection probability characteristics, low interception probability characteristics and anti-electronic jamming capacity.
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Description

Technical field

[0001] The invention relates to the field of broadband chaotic radar signal design, in particular to a method and system for generating a broadband chaotic radar signal with random carrier frequency hopping. Background technique

[0002] The noise radar uses a noise signal or a pseudo-noise signal as the transmission waveform. Currently, noise radar has been extensively studied in many fields, including battlefield surveillance, target tracking, vehicle collision avoidance, through-wall imaging radar, synthetic aperture radar, and inverse synthetic aperture radar.

[0003] In noise radar, noise signal source is an important key technology. Compared with ordinary thermal noise signals, chaotic signals are easier to generate and control, and the price is low. Chaotic signal is a pseudo-random signal generated by a deterministic system. The characteristics of the chaotic signal are: very sensitive to the initial value, small changes in the initial value will cause a...

Claims

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