Electronics > Projects, Designs, and Technical Stuff
Digital FPV video for drone racing
radioactive:
--- Quote from: hexahedron on January 18, 2019, 07:16:33 pm ---To start, instead of using a 1 bit data stream, we can use 3 bits (8 values) for our data stream. This triples our data rate from 6Mbits/sec to 18Mbits/sec.
--- End quote ---
What do you plan on using for the RF system here out of curiosity? Single carrier? Multi-carrier? FEC? I assume you must have an off-the-shelf module in mind to interface with.
Marco:
The talk about interference and 2.4 GHz is irrelevant, he wants to use transmitters compliant for drone racing which usually take NTSC signals and use them to carry digital video. They are noisy, shouty things ... but that's out of his hands.
6 MHz != 6 Mb/s by the way ... you can stuff a whole lot more data through. How much depends on SNR, intersymbol interference and how you implement error correction.
Gary350z:
John Adams from Horizon Hobby and Spektrum discusses digital FPV video and the problems it creates in this interview.
https://youtu.be/BbwDRqF6Kb0?t=1294
Marco:
--- Quote from: hexahedron on January 18, 2019, 07:16:33 pm ---but for now I want to see how this community responds to this post.
--- End quote ---
Do you have the space/power for some low power SBC (i.MX6ULL based?). The amount of effort needed to experiment with video coding algorithms will be a lot less than with a FPGA. Stuff like training sequence based equalization is also a hell of a lot easier in C than VHDL (I think it's a safe bet that signal strength is going to affect intersymbol interference).
NiHaoMike:
I'm thinking that using both the 5GHz transmitter and an off the shelf 2.4GHz transmitter together would yield a more robust signal than either one alone.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version