Design And Implementation Of Frequency Modulated Continuous Wave Radar

In recent years,with the rapid development of the wireless communication and radar technology,the relevant applications such as internet of vehicles,internet of thing,autodriving sprout out explosively,which also poses higher demands for the objects sensing with higher accuracy and stronger anti-interference ability.The general solution to address this issue is to increase the operation frequency,even up to the optical regime.However,the optical wave can not penetrate smog or dust,which means the radar operating at this bands would be out of work.The millimeter wave,locating between microwave and optical bands,shows distinct features that it can penetrate the smog or dust.Compared with the optical regime,the millimeter wave shows great advantages to adapt the variable environments with affordable weight of the radar.Therefore,it is highly necessary to carry out research and designs for millimeter wave radar.Compared with microwave regime,the millimeter wave has higher frequency manifesting higher sensing resolution.In this paper,a frequency modulated continuous wave(FMCW)radar operating at millimeter wave bands is designed and researched.Finally,the measurements are demonstrated showing satisfied results achieving desired goals.According to the principle of millimetre-wave radar,especially the working mechanism of FMCW radar,combined with practical engineering requirements,the research and design of the proposed FMCW radar operating at millimetre wave band are carried out.Finally,the range tests of the proposed radar are demonstrated and analysed.The test results basically satisfy the design requirements.For China,there is still a long way to be a leader in millimeter-wave FMCW radar community for academic and industrial achievements,especially in independent intellectual property rights.The proposed projects are developed from domestic millimetre-wave transceiver chip,which may bridge the gap between China and other developed countries in this field.The contents of the paper can be summarized as follows:The measurement theory for range,speed and angle sensing based on the FMCW radar platform is simply introduced.And the detailed performance and corresponding parameters of the proposed radar system are carefully analyzed,as well as the coupling influence between the system parameters.Based on the domestic millimetre-wave transmitter and receiver chip,the hardware design for the FMCW radar is proposed and analyzed.Including the intermediate frequency processing part,power supply part,the metallic camber for assembling and fielding.Combined with the project's demands,a millimetre wave planar antenna is proposed with careful analysis and designs.Firstly,the radiation theory of the proposed antenna is introduced,which is then used to guide the design of the proposed antenna.The design procedure and solution are all analysed and demonstrated.The digital signal processing(DSP)chip named TMS320F28335 is introduced.And the algorithm for the FMCW radar is verified by Matlab Simulink.Finally,the software for such algorithm is designed based on the DSP development platform.The proposed FMCW radar is assembled with the measurements results demonstrated.Finally,the contents of this paper are summarized with some design issues discussed.