Ultra-wideband waveform generation circuit and method, and radar signal simulator

Abstract

The invention provides an ultra-wideband waveform generation circuit and method and a radar signal simulator, and the circuit comprises a baseband module which generates an output baseband signal; the phase locking module is used for receiving the baseband signal, performing phase locking frequency multiplication processing on the baseband signal and outputting a first frequency multiplication signal; and the spread spectrum module is used for receiving the first frequency multiplication signal, performing spread spectrum processing on the first frequency multiplication signal and outputting a second frequency multiplication signal. The phase locking module carries out phase locking frequency doubling processing on a baseband signal generated and output by the baseband module, the frequency of the baseband signal can be quickly and effectively expanded to an ultra-wideband frequency to obtain a first frequency doubling signal of the ultra-wideband, and then the spread spectrum module carries out spread spectrum processing on the first frequency doubling signal to obtain a second frequency doubling signal with a wider frequency band. The ultra-wideband waveform generation is quickly and efficiently realized, the generation of radar common waveforms such as continuous waves, conventional pulses, repetition frequency jitter, repetition frequency stagger and dual-frequency pulses can be realized in a full frequency band, and the corresponding design structure is simple and the cost is low.

Description

technical field [0001] The invention relates to the technical field of radar signal simulators, in particular to an ultra-wideband waveform generation circuit and method, and a radar signal simulator. Background technique [0002] In today's society, radar plays an indispensable role. It is not only an indispensable electronic equipment for the military, but also widely used in social and economic development (such as weather forecast, resource detection, environmental monitoring, traffic control, etc.) and scientific research. (Astronomical research, atmospheric physics, ionospheric structure research, etc.). [0003] In the development process of various radars, the radar signal simulator plays a key role in the debugging and testing of radar performance. The current conventional radar simulator waveform generation scheme is to use DA (digital-to-analog converter) or DDS (direct digital frequency synthesizer) to generate a baseband signal with a narrow bandwidth, and then...

AI Technical Summary

Problems solved by technology

The current conventional radar simulator waveform generation scheme is to use DA (digital-to-analog converter) or DDS (direct digital frequency synthesizer) to generate a baseband signal with a narrow bandwidth, and then move the frequency to the radar through multiple frequency mixing. In the working frequency band, this method has good flexibility, but due to the narrow bandwidth of the baseband signal, it is often necessary to expand the bandwidth by multi-segment frequency splicing when realizing wideband radar simulation, and the link will become very complicated

However, the operating frequency of modern radar is getting higher and higher, and the operating bandwidth is getting wider and wider. The operating frequency can cover hundreds of MHz to tens of GHz. The traditional simulator solution is difficult to achieve generalization, and the cost, power consumption, and size vary with each other. increases with bandwidth

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