Device for generating baseband signal of continuous pulse radar

Abstract

The invention discloses a device for generating a baseband signal of continuous pulse radar. The device for generating the baseband signal of the continuous pulse radar is composed of an interface unit, a cache unit, an acceleration unit, a digital-to-analogue conversion unit and the like, wherein the interface unit is used for reading out a compressed digital baseband signal from a read-only memory, decompressing the compressed digital baseband signal to generate a timing control signal which is needed by a system and updating the compressed digital baseband signal in the read-only memory in real time through communication with the outside, the cache unit is used for caching a large amount of compressed digital baseband data and achieving first-time acceleration of the baseband data, the acceleration unit is used for rapidly reading out multiple paths of digital baseband signals from the cache unit and then improving the speed by times until the speed reaches the speed grade of the digital-to-analogue conversion unit, and the digital-to-analogue conversion unit is used for converting the digital baseband signal into analogue baseband signals. The device for generating the baseband signal of the continuous pulse radar has the advantages that large-pulse-width baseband signals can be output, and predistortion of a waveform is available. The device for generating the baseband signal of the continuous pulse radar is mainly applied to continuous pulse radar exciters.

Description

technical field [0001] The invention relates to a radar exciter, in particular to a continuous pulse radar baseband signal generating device. Background technique [0002] Continuous pulse radar is a new synthetic aperture radar (Synthesis Aperture Radar-SAR), which transmits a group of continuous pulse signals in a predetermined pulse code, receives echoes at pulse intervals, and then synthesizes single pulse echoes through signal processing. . The system radar can increase the working ratio of the transmitter to more than 40%, directly reduce the peak power of the transmitter to the order of 10W, and realize the high performance of the continuous pulse radar with a weight of less than 5kg and a range of more than 10km. [0003] The baseband signal source is an important part of the continuous pulse radar exciter. It is used to generate the baseband signal required by continuous pulse radar. The characteristics of the continuous pulse radar exciter: the number of sub-pul...

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Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a continuous pulse radar baseband signal generating device, to overcome the shortcomings of the direct digital waveform synthesizer and waveform storage direct reading method in traditional pulse radar, and to meet the needs of continuous pulse radar radar. Ratio, large bandwidth and complex waveform requirements for baseband signal sources

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