Research On Hardware-in-the-Loop Simulation Of Stepped Frequency Chirp Signal

In radio technology,radar and communication are two common and important applications.Radar can realize the function of detection and recognition,and the function of communication is to realize information transmission.In order to accomplish different tasks,many platforms are equipped with a variety of electronic devices at the same time.This not only makes the platform large and complex,but also leads to the overcrowding of spectrum resources.The integration radar and communication is an effective way to solve the above problems.So it has become a hot research direction.In this paper,a part of the realization of radar communication integration is studied,including the introduction and simulation of communication system,the construction of hardware in the loop simulation system and the simulation and processing of stepped frequency Chirp signal used in the integration of radar communication.The main contents of this paper are as follows:1.Introduction of communication system and anti-fading computer simulation experiment.The anti-fading technology in communication system is studied.This paper mainly introduces diversity technology.2.Build the hardware-in-the-loop simulation experiment system.The main instruments used are Rohde & Schwarz's signal generator and spectrum analyzers,and the signals are observed with an oscilloscope to judge the accuracy of the results.The radar system is built with general instruments,which has better flexibility and versatility.3.The hardware-in-the-loop simulation experiment and actual signal processing.It mainly uses stepped frequency Chirp technology and frequency domain bandwidth synthesis technology in signal processing.In the simulation,the wideband synthesis is performed in the frequency domain,and then using the IFFT to transform into the time domain.Resolution of the distance of the signal is judged by comparing the main lobe width of the signal.The experimental results show that as the number of steps increases,the range resolution will become higher and higher.4.The interpolation and extrapolation method is studied to fill in the signal of the disturbed frequency band.Comprehensive use of various signal processing technology to obtain more accurate information expressed by the signal,lay a solid foundation for the implementation of the radar communication integration program.