FOSA @fosatech

Dedicated to improving freedom, privacy, and independence through technology. fosa-tech.com Joined October 2022

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Logarithms @logarithms_corp

a year ago

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

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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.

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FOSA @fosatech

2 years ago

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Vlad Saye 🏴 @vladsaye

2 years ago

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

Mike Dano @mikeddano

2 years ago

"Verizon isn’t partnering up with anyone because it hasn't seen a great consumer demand for space-based connectivity and it doesn’t want to give up its own terrestrial spectrum when satellite companies have their own." via @malleven33 fiercewireless.com/wireless/why-v…

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FOSA @fosatech

2 years ago

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

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Vlad Saye 🏴 @vladsaye

2 years ago

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.

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FOSA @fosatech

2 years ago

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

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FOSA @fosatech

2 years ago

300MHz -- 1GHz 25kHz bin size 83ms sweep time Closeup in next post ⬇️

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Vlad Saye 🏴 @vladsaye

2 years ago

See signal > click on signal > get system info

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Vlad Saye 🏴 @vladsaye

2 years ago

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

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FOSA @fosatech

2 years ago

rf/acc

Vlad Saye 🏴 @vladsaye

2 years ago

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.

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Vlad Saye 🏴 @vladsaye

2 years ago

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.

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Vlad Saye 🏴 @vladsaye

2 years ago

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Vlad Saye 🏴 @vladsaye

2 years ago

Testing out the new maprad.io updates with Raven.

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Vlad Saye 🏴 @vladsaye

2 years ago

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.

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FOSA @fosatech

2 years ago

😎

Vlad Saye 🏴 @vladsaye

2 years ago

RF is black magic. Fosa will be a company of wizards.

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Vlad Saye 🏴 @vladsaye

2 years ago

Post your favorite hardware iteration photos 👇

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FOSA @fosatech

2 years ago

Raven allows you to use multiple SDR's over rtl_tcp to tune in to signals you see on the wideband scan. fosa-tech.com/software

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FOSA @fosatech

3 years ago

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: ieeexplore.ieee.org/document/80423…

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Vlad Saye 🏴 @vladsaye

2 years ago

@wyomingsurvival You should use a hackrf with Raven. Sweep times are fast enough to catch P25 TMS data while looking at 400MHz of BW. fosa-tech.com/software x.com/fosatech/statu…

FOSA @fosatech

2 years ago

300MHz -- 1GHz 25kHz bin size 83ms sweep time Closeup in next post ⬇️

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FOSA @fosatech

2 years ago

@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.