Study On Multi-frequency Continuous Wave Radar Signal Processing Algorithm

Multiple frequency CW radar has the advantages such as simple structure, simplealgorithm and convenience to the use of modern digital signal processing. But it ispointed out that this algorithm cannot solve the ranging problem of multiple targetswith the same speed, which make it can be only used in the areas such as the shootingrange measurement. So to get wide applications, it is very meaningful to do research indepth on the theoretical algorithm of this kind of radar.In this paper, all my work focuses on the ranging theory and algorithm of multiplefrequency CW radar. Firstly, for multiple frequency continuous wave radar, linearfrequency continuous wave radar and stepped-frequency continuous wave radar, thispaper conducted a simulation and comparative analysis. Then, this paper proposed amulti-target distinction algorithm of stepped frequency CW radar, by conducting animprovement to the ranging algorithm of Stepped-frequency continuous wave radar. Atlast, this paper put forward a new algorithm of CW radar by combined the multiplefrequency CW radar based quadratic phase difference with the multi-target distinctionalgorithm of stepped frequency CW radar.The simulation results showed that the multi-target distinction algorithm ofstepped frequency CW radar can easily solve the ranging problem of multiple targetswith the same speed in the multiple frequency CW radar, and it had a good rangingperformance but greater algorithm complexity. The simulation results also showed thatthe stepped frequency and quadratic phase difference CW ranging algorithm had ahigher ranging accuracy than the multi-target distinction algorithm of steppedfrequency CW radar.