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Pseudo-Doppler Radio Direction Finder
Home Pseudo-Doppler RDF
Pseudo-Doppler Radio Direction Finder

Pseudo-doppler DF technique

doppler1small

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. 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.

 

Flyer about SoundDoppler download

 

"SoundDoppler" a program of Lodewijk Baars PA3BNX, simulates doppler hardware.

 

Equipment needed for Mobile Foxhunt with Sound-Doppler

 

Download SoundDoppler and MyMapping here and the SoundDoppler readme file here and MyMapping readme here

(PCB's and installation instructions are included in the .zip file)

 

 

Purpose
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Replaces the traditional doppler-decode-equipment by the soundcard. This program can also be used stand alone on stationairy doppler monitoring. You need a stereo-line-input on the soundcard. It requiers a sinus reference signal locked on the doppler-switcher. on the left-channel and demodulated FM-Rx-audio on the right-channel. It assume that the reference signal is between 300-2300 Hz.

SoundD1_s

SoundD2_s

 

SoundD3_s

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

screendumpsounddoppler

 

MyMapScreenDump

 

Simple4013doppler_s

 

simpleantennaswitcher_s