Application of Compressed Sensing in Vehicular LFMCW Millimeter Wave Radar Ranging

摘要

With the emergence of the concept of vehicle auto driving, vehicle mounted radar is becoming more and more widely used in vehicles. Millimeter wave has been widely used in vehicle radar because of its advantages of high resolution, low interception probability, small size of antenna components and strong anti-interference ability. In the traditional signal processing scheme, the sampling frequency must be greater than two times the maximum frequency of the signal due to the limitation of the sampling theorem. Because the working frequency of vehicular radar is relatively high, which brings challenges and difficulties to sampling devices and data storage devices, and the compressed sensing method can recover data based on a small number of data sampling values. This paper analyzes the principle of velocity measurement and ranging for triangular wave modulated FMCW radar, introduces the concepts of compressed sensing, and uses the method of compressed sensing to simulate the radar ranging, and achieves good results.