Stepped frequency radar is a well known scheme to generate high range resolution profile(HRRP) of targets. Through appropriate radar parameter design,the radar enables both unambiguous velocity measurement and high resolution ranging within a single dwell in a high pulse repetition frequency(HPRF) mode. This paper analyzes in detail the design principle of the HPRF stepped frequency radar system,the solution to its ambiguity issue,as well as its signal processing method. Both theoretical analysis and simulation results demonstrate that the proposed radar scheme can work independently to solve the problem of motion compensation,and is therefore highly applicable to many new types of radar. Due to radar parameter design, the radar enables both unambiguous velocity measurement and high resolution ranging within a single dwell in a high pulse repetition frequency (HPRF) mode. This paper analyzes in detail the design principle of the HPRF stepped frequency radar system, the solution to its ambiguity issue, as well as its signal processing method. both theoretical analysis and simulation results demonstrate that the proposed radar scheme can work independently to solve the problem of motion compensation, and is therefore highly applicable to many new types of radar.