FOSA

Dedicated to improving freedom, privacy, and independence through technology.

[FOSA @fosatech]

Freedom of speech and information in the digital age will never happen until the underlying infrastructure is re-built in a way that supports it.

⬇️

[Logarithms @logarithms_corp]

Angle of Arrival and TDOA localization with 3 RTL-SDRs with AEDA

[FOSA @fosatech]

C/acc

[Vlad Saye 🏴 @vladsaye]

400MHz - 1GHz
The vertical axis represents about 1.4 minutes of time

Imagine this level of mapping (and more) from thousands of locations, across the majority of the RF spectrum, for months of time. This is what we'll provide with Olympus.

[Vlad Saye 🏴 @vladsaye]

Unlikle @TMobile / @Starlink why doesn't Verizon want to give up its terrestrial spectrum for direct to device/D2C?

Beams from satellites generally cover a much larger area than a single tower, meaning your capacity per Hz of bandwidth is spread out over a much larger area. Maximizing capacity in physical space is a function of increasing bandwidth and "cell" density.
Of course, the major advantage of a satellite is that it can provide coverage to an area without the robust physical infrastructure required for terrestrial networks. The obvious downside is that the under-served areas that D2D mainly targets usually have less customers.

Less customers = less revenue = less incentive for investment. Luckily, Starlink has plenty of residual capability to make this viable, and the demand for connectivity is high in areas that don't have it.

But the big thing here is spectrum usage. In a dense area with plenty of infrastructure, the best use of spectrum is almost always for high density terrestrial networks. But not everywhere is a dense urban metropolis.

The worst thing to see is when available spectrum, in an area that desperately needs coverage, goes underutilized. Even though the resource is there, it's either "owned" by someone else, or is too close to other systems to utilize it interference free via traditional methods. And this isn't just a problem in rural areas.

The spacial complexity of the RF domain is an incredibly difficult thing to manage across frequency and time. This is why, for the future of human connectivity, we need the adoption of technologies like cognitive radio that make these decisions at the edge, and not on a piece of paper.
This is why we're going to map out the RF spectrum in frequency, space, and time. To pave the groundwork for better, cheaper, and more reliable connectivity.

C/acc

[FOSA @fosatech]

@spacelaserinc @elonmusk @vladsaye @ChrisJBakke @Support isn't comedy supposed to be allowed on here?

[Vlad Saye 🏴 @vladsaye]

It's time to share my master plan for Fosa 🫡

Our mission? To rebuild wireless infrastructure from the ground up, and make global internet connectivity cheaper, faster, and unconstrained.

Fosa will technologically preserve the Freedom of Speech for humanity.

[FOSA @fosatech]

@intelaficionado Yes! This scan was done with a hackrf though

[FOSA @fosatech]

300MHz -- 1GHz
25kHz bin size
83ms sweep time

Closeup in next post ⬇️

[Vlad Saye 🏴 @vladsaye]

See signal > click on signal > get system info

[Vlad Saye 🏴 @vladsaye]

Mapping out RF in 3 dimensions: frequency, time, and space.

[FOSA @fosatech]

rf/acc

[Vlad Saye 🏴 @vladsaye]

Imagine a wireless communications standard where you can buy a COTS RF chip, load some cash on to the internal hardware wallet, and have connectivity across the globe.

No questions, no contracts, no centralized pillars. Data so cheap it's practically free.

[Vlad Saye 🏴 @vladsaye]

Raven already lets you query registered devices and systems associated to a certain frequency.

Logging this data over several distributed Olympus nodes will be huge, especially in shared/congested bands.

[Vlad Saye 🏴 @vladsaye]

Testing out the new https://t.co/4sak1j297g updates with Raven.

[Vlad Saye 🏴 @vladsaye]

Imagine asking an LLM to build out a wireless deployment plan for you, and it returns with a spectrum availability comparison, cost, hardware recommendations, a link budget analysis, historical interference patterns, competitor analysis, and deployment location and coverage opts.

[FOSA @fosatech]

😎

[Vlad Saye 🏴 @vladsaye]

RF is black magic.

Fosa will be a company of wizards.

[Vlad Saye 🏴 @vladsaye]

Post your favorite hardware iteration photos 👇

[FOSA @fosatech]

Raven allows you to use multiple SDR's over rtl_tcp to tune in to signals you see on the wideband scan.

https://t.co/yrzj8BTkiQ

[FOSA @fosatech]

Ground based DF is one thing, but what happens when EW assets end up in space? How effective are they?

Here's an interesting paper on the topic of TDOA/FDOA in space:
https://t.co/EhISkPiCjn

[Vlad Saye 🏴 @vladsaye]

@wyomingsurvival You should use a hackrf with Raven. Sweep times are fast enough to catch P25 TMS data while looking at 400MHz of BW.

https://t.co/3lo7FsRbXX

https://t.co/iT2lUiWrD9

[FOSA @fosatech]

@DoomerTapes Build tools that people want to use.

If you care about freedom/privacy, your set of constraints is larger, but every piece of technology that currently takes away those things is just something that a human made.