Disclosed herein are systems and methods for using high phase noise oscillators in Doppler radar systems. In some embodiments, a transmit pulse is sampled corresponding with a transmission time, and a phase noise correction factor is developed based on the sample transmit pulse and corresponding with the transmission time. A return echo is received that corresponds with the transmission time of the transmit pulse, and the return echo is modified based on the phase noise correction factor derived from the corresponding transmit pulse. In some embodiments, the transmit pulse can be generated from a magnetron or other high power oscillator having high phase noise. In some embodiments, the modified return echo is processed to differentiate clutter by resolving a Doppler shift.