pgorczak

11 ms·

61.
by pgorczak 5y ago
The parent comment hints at another interpretation of status, which is also used in improv. The status you “play” in your interaction with others, which can be different from your social status ( https://www.respect4acting.com&#x2
62.
by pgorczak 5y ago
As a sibling already mentioned, thermal noise occurs in the sensors. And there is also a range of cosmic background radiation coming in, including the cosmic microwave background which is just everywhere and is almost as old as the universe
63.
by pgorczak 5y ago
Regarding 3: pretty much, you can get the estimated channel impulse response from the device. https://www.decawave.com/wp-content/uploads/2018/10/APS006_P...
64.
by pgorczak 5y ago
Yeah, Promise really helps illustrating these concepts. Also while being less explicit in the syntax, the combination of Promise and Promise.then forms a functor that - maps type x to type Promise<x> - maps function x -> y to funct
65.
by pgorczak 5y ago
I get the author’s idea and I’ve been there before. When you’re still exploring a problem domain it’s really useful to abstract and compose because it helps you both understand the problem better and iterate more efficiently. At some point
66.
by pgorczak 5y ago
To expand on some of the other replies: maybe not QR and Gauss-Jordan directly, but understanding linear maps and subspaces is relevant in kinematics, especially kinematic chains like robot arms / manipulators. You can formulate a task
67.
by pgorczak 5y ago
While roughly 3/4 of total emissions come from generating energy (electricity, heating, moving things). https://www.wri.org/data/world-greenhouse-gas-emissions-2018
68.
by pgorczak 5y ago
I think this distinction is worth mentioning whenever the comparison with fascism comes up. There is communist philosophy that we can discuss or joke about like OP that is somewhat disconnected from the brutal historical reality. This is no
69.
by pgorczak 5y ago
Although when receiving a weak signal with strong out of band interference, you may still need a lot of dynamic range to successfully filter it out digitally.
70.
by pgorczak 5y ago
I think it boils down to thinking in composition (x has a y) vs inheritance (x is a y). I’m happy about protocols because most of the times, coming up with some pattern or order of inheritance using ABCs really feels beside the point of wha
71.
by pgorczak 5y ago
You don’t need strong typing but good naming to avoid these issues. While a type system kind of requires everything to be named, it really doesn’t matter to the type checker whether these names are semantically correct or have any semantic
72.
by pgorczak 5y ago
LTE and 5G use something like pre-shared keys for both user and operator so no to the second option in most cases except emergency use (you can make emergency calls via any network).
73.
by pgorczak 5y ago
Rules are different in each country of course but most unlicensed frequencies can only be used with mechanisms that leave space for other users (networks) like listen before talk or restricted duty cycles. Cellular technology isn’t built wi
74.
by pgorczak 6y ago
There are satellite networks that can pick up AIS broadcasts from almost anywhere on the planet. So you can track a ship in the middle of the ocean with a few minutes delay. Pretty amazing to imagine how many signals these satellites have t
75.
by pgorczak 6y ago
Same here while working on a UAV even though the GPS module was mounted about 20 cm away from the single board computer. We looked at it with a spectrum analyzer back in the lab and the USB 3.0 ports really sent out some wide band interfere
76.
by pgorczak 6y ago
Some of the letters in the comment do look like cursive
77.
by pgorczak 6y ago
I feel like the article cherry picks examples of TCP doing either too much or too little given specific applications. Of course we could always go by the end-to-end principle and tailor protocols from scratch each time we build an applicati
78.
by pgorczak 6y ago
I've been using the same combo for a few years. You can run a Syncthing image off Docker Hub directly e.g. using compute engine and optionally persist config and data in volumes, making for a pretty easy setup.
79.
by pgorczak 7y ago
I felt this way too. At least one thing is blatantly wrong though: there is no discipline of institutional criticism. This is literally what political science deals with.
80.
by pgorczak 7y ago
They haven't released 1.0 yet though which is probably why it hasn't been advertised more openly. Hope it happens soon so we don't have to install pre-releases to run new versions of Altair anymore (edit: Altair + Jupyter Lab
81.
by pgorczak 8y ago
They do and pretty reliably. The devs of the srsLTE stack even have this neat CI setup where they test the codebase against commercial hardware: http://www.softwareradiosystems.com/pipermail/srslte-users/2...
82.
by pgorczak 8y ago
Not much actually. You need to make auth work which means knowing some secrets stored on the SIM card. You can buy your own custom cards or probably use eSIM (however I haven’t tried option 2).
83.
by pgorczak 8y ago
Chiming in from GP: I think mobile setups like base stations mounted on drones or high altitude platforms are really interesting. We’re currently looking at providing cellular connectivity to rescuers and rescuees at sea using a fixed wing
84.
by pgorczak 8y ago
The https://github.com/srsLTE/srsLTE/ readme says they’ve tested LimeSDR too (I don’t know how well the smaller versions of Lime would work though)
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by pgorczak 8y ago
If you wonder about real world use cases for open source LTE stacks like srsLTE: They’re great for deploying small ad-hoc cells e.g. in vehicular and rescue scenarios like in our work from earlier this year: https://arxiv.org&#x2
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Show HN: End-to-end LTE example with Docker and emulated radio(github.com)
210 points by pgorczak 8y ago|46 comments
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by pgorczak 8y ago
Haven't tried it myself but srsLTE's README [1] says they've tested their eNB with BladeRF and even LimeSDR frontends. [1] https://github.com/srsLTE/srsLTE
88.
by pgorczak 8y ago
And a few more pure EPC implementations like NextEPC [1] and Pycrate/corenet [2–3]. The srsLTE eNB works pretty well with NextEPC for me :) [1] https://github.com/acetcom/nextepc [2] https://github.com&
89.
by pgorczak 8y ago
With srsLTE you just need to run the srsenb and srsepc processes with their example configuration files while having a compatible SDR connected. If you want to attach your own phone you need to have the right credentials of course but an sr
90.
by pgorczak 8y ago
If I swap my labels wrong I can still go bankrupt though.

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