| Due to the variety of radar functions and the complexity of the back-end signal processing algorithms,the cost and complexity of building a real radar working environment is high Therefore,it is necessary to develop a miniaturized radar principle verification device with high versatility and low cost.This paper introduces a radar principle verification device for simulation training.The device uses the fully programmable system-on-chip ZYNQ-7000 as the main control unit,which can simulate the modulation signal transmission,IF echo generation and signal detection of the radar in real time.The verification of radar imaging algorithm and target detection and tracking algorithm provides a teaching platform for radar operation training.This paper studies the generation of radar transmit waveforms,the simulation of intermediate frequency echo signals,and the back-end processing of the detected echo signals by high-performance digital hardware boards.The main work done in this paper is as follows:1.A hardware platform based on the ZYNQ-7000 main control chip was built.The RF transmitting and receiving module of the analog radar is realized by the high speed DAC chip DAC3280 and the ADC chip ADS62P49.Based on the arm core of ZYNQ-7000,the software system for controlling command transmission and reception and data processing transmission is realized,and a miniaturized and integrated general radar simulation platform is constructed.2.Based on the requirements of radar verification equipment system function,several common radar emission waveforms are analyzed and analyzed.The scheme of simulating the actual target echo signal is given,and the algorithm of quadrature detection of intermediate frequency echo signals is introduced.And the above algorithm is implemented by the PL module of ZYNQ-7000.3.Based on the framework of MATLAB+Qt,the generation of emission and echo simulation parameters is realized.Using the advantages of MATLAB to realize the modeling of digital signals,and then build the front-end interface and back-end server through QT to realize the generation and transmission of operation commands and the transmission of waveform data.This device integrates the radar’s function modules such as transmission,echo simulation and reception,which reduces power consumption,improves the integration of the device,and has strong scalability. |
