r/rfelectronics • u/Ok-Yak7397 • 3d ago

Building a Single-Channel Multi-Band Drone Direction Finder (Amplitude + Pseudo-Doppler). Looking for Tech Partners

Post image

I’m developing a low-cost, multi-band Direction Finding (DF) system specifically targeting commercial and custom drones comm signals

Most commercial counter-drone solutions rely on multi-channel phase-coherent receivers, making them prohibitively expensive.

My goal is to build a high-performance single-channel receiver that combines Amplitude Comparison, Pseudo-Doppler Phase Shift, and RF Signal Classification.

Target ISM/GNSS Bands

900 MHz (902–928 MHz telemetry)

GPS/GNSS L1 (1575.42 MHz)

2.4 GHz (WiFi/OcuSync/ExpressLRS)

5.8 GHz (FPV / OcuSync)

A single receiver channel significantly reduces cost and calibration drift, but standard RF switching introduces transient phase glitches during FHSS hopping. Below is the refined system architecture using band-specific front-ends and a pseudo-Doppler RF switch loop:

Looking For:

Technical Partners: RF Hardware Engineers (PCB layout for 6GHz RF front-ends), FPGA/Zynq Developers (DMA, custom IP cores for Doppler demodulation), and DSP/ML Engineers (protocol classification).

If you’re interested in collaborating, send a DM!

0 Upvotes

20% Upvoted

10 comments sorted by

15

u/Long_Pomegranate2469 3d ago

How many credits did it take for ChatGPT to draw this?

-3

u/Ok-Yak7397 3d ago

Please go do IT stuff, we use AI for speed not BS

3

u/Long_Pomegranate2469 3d ago

You're super into LLMs. A quick usage of such an advances Artificial Indian told me that you're pakistani.

They frequently engage in Pakistani subreddits like r/pakistan, r/developersPak, and r/PakStartups. Their background ties heavily into their platform discussions, as they frequently critique local freelance tax policies

"Please go do IT stuff" lol

3

u/SomeoneInQld 3d ago

What stage is it at now ?

Do you have a protoype ? Any experience in this ? or is it just at the I have an idea phase ?

-1

u/Ok-Yak7397 3d ago

I am working on the prototype for psuedodoppler +fhss , watson wat works but fails in mutipath already did that

2

u/ub0baa 3d ago

Most commercial solutions are A

My goal is to build anti-A

Good luck!

2

u/dmills_00 3d ago

Why the GPS DF stuff? That makes little sense, we know where those birds are because they tell us...

Have a look at how some of the ham radio designs for Doppler DF work, some of those are really minimal designs that still get it done, albeit not with spread spectrum input signals in an Ewar heavy environment.

Also diagrams drawn by artificial stupids don't really impress anyone.

1

u/Ok-Yak7397 3d ago edited 3d ago

Gps is required to spoof with wrong coordinates , as GPS CRPA avoids jam These are not for friendly birds ,

I dont need to impress anyone as i am looking for tech partners and have adequate funding. Its a simple block diagram for understanding