11/3/2020 · Doppler and Pseudo-Doppler Technique The Doppler DF system uses a single receiver connected to an omni directional antenna that is physically rotated on the circumference of a circle. As the antenna moves toward the radio source, doppler shift will increase the received frequency and the received frequency will decrease as the antenna moves away from the source.
Pseudo-doppler DF technique. The pseudo-doppler technique is a phase based DF method that produces a bearing estimate on the received signal by measuring the doppler shift induced on the signal by sampling around the elements of a circular array.
Pseudo-Doppler Direction Finding Synthesize a rotating effective antenna by switching between elements in an array Effective antenna moves toward/away from source ? Doppler shift Typically use a soft-switching profile to reduce phase discontinuities
