Editing Direction finding (section)

====Pseudo-doppler DF technique====
The [[Doppler radio direction finding|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.  The original method used a single antenna that physically moved in a circle but the modern approach uses a multi-antenna circular array with each antenna sampled in succession.