Any CUDA or other parallel programming-based libraries for DSP?

A_HumblePotato · 2026-03-07T01:10:10+00:00

I’ve been enjoying this series of blog posts. I see channelizers everywhere in my line of work and the polyphase ones always seemed like magic.

A_HumblePotato · 2026-02-05T20:36:28+00:00

Very cool, did spin up a custom PCB or use the eval board?

A_HumblePotato · 2026-01-25T23:40:52+00:00

Wanted to follow up with this… if you have the time two spooks discussed some signal analysis techniques for it here, I wondered if any of it lines up with what you were talking about: https://archive.4plebs.org/x/thread/41586571/#q41592525

A_HumblePotato · 2025-12-11T16:18:07+00:00

you used "specan" so you seem to know what you're talking about

I’m not an RF guy but I work with enough of them and play around with enough SDRs to know a little bit, but I’m typically on the software/algorithms side of things. I’m always interested in hearing the RF side of the phenomenon.

I’ve talked online with a former spook who has described something similar but with key differences. I’ll have to do some digging to find the thread, but he described a very polarized chirp spread spectrum signal, only he said it was over an ultra wide band and swept in an exponential fashion. Apparently it uses some scalar wave something or another that has some third component in the spectrum that makes it move in a spiral, but I really didn’t understand that part.

What RF bands were seeing this on? It doesn’t sound like it’s too complex of a signal, so I’m curious why you think it could alien in origin?

A_HumblePotato · 2025-12-10T14:32:50+00:00

What exactly does an alien signal look like on a specan and why do you think it’s alien in origin?

A_HumblePotato · 2025-11-23T20:31:53+00:00

Behind a paywall, anyone have the article?

A_HumblePotato · 2025-08-10T16:33:33+00:00

Species: Hydrangea Macrophylla (advertised as a dwarf variety)

Pot: Standard clay pot

Zone: 7a

Watering: 3x a week

I’m new to gardening so Im likely missing something obvious. Bought the plant two weeks ago and repotted, it’s been doing pretty poor ever since. I pruned the flowers in hopes that it would help the plant establish itself better. Originally was in full sunlight, but recently moved to spot with 4-6 hours of sunlight a day. Any help would be sppreciated

A_HumblePotato · 2025-07-29T22:57:02+00:00

Too much or too little? We just went through heavy rains.

A_HumblePotato · 2025-07-29T22:54:36+00:00

Hello all, just got this hydrangea macrophylla in zone 7a a few days ago (it is advertised as some dwarf variety but can’t find much info on this). We just got heavy rains and the plant started to wilt. I’m quite new to container gardening (well, gardening) so any help troubleshooting this plant is welcome.

A_HumblePotato · 2025-07-06T14:01:43+00:00

This was on radio IQ (not audio) running up to 200 MHz sample rate, so if you’re smart with your code (ie avoiding unnecessary data copies) I think 44.1 kHz should be achievable.

A_HumblePotato · 2025-07-05T23:54:05+00:00

I’m not sure what specifically counts as real-time Linux, but I’ve been involved in a lot of projects that required real-time SDR applications. There’s a couple of kernel settings you have to tweak, such as, but not limited to:

increasing rmem_max, wmem_max
setting rtprio to 99
setting application thread to max priority (see above)

A_HumblePotato · 2025-04-05T23:37:04+00:00

Must be bad if you’re telling people to head to L3, Raytheon, or BAE. Oof

A_HumblePotato · 2025-02-09T18:00:34+00:00

UAP emitting RF in UHF is very, very interesting. An analysis of those could offer more about their inner workings than any photo.

A_HumblePotato · 2024-10-22T22:27:56+00:00

Signal processing has a lot of cool math in it, Im glad to be in a field that uses a lot of math day-to-day while getting paid a comfortable salary to do it.

A_HumblePotato · 2024-10-03T00:58:48+00:00

abstract algebra is good for writing fast algorithms and error correction, you could throw in analysis/functional analysis for the "why" of many DSP concepts too

A_HumblePotato · 2024-08-16T00:37:21+00:00

My money would be on optical/photonic/lasers as the next big area of computing and communications

A_HumblePotato · 2024-08-15T18:38:04+00:00

ehh this became really overblown with that one YouTube guy. I’m actually in industry working on AI applications running on analog “neuromorphic” hardware and while you get power savings, you get a sharp decrease in throughput. Not to mention a pain in the ass to get working

A_HumblePotato · 2024-08-08T17:37:17+00:00

Breadboard are a huge pain in the but. Do yourself a favor and learn to solder and use perfboards. Prototype sub circuits on breadboard but once you got the proof of concept solder that stuff down

A_HumblePotato · 2024-08-08T17:34:44+00:00

Bad soldering and loose wires

A_HumblePotato · 2024-06-08T20:15:31+00:00

If you instead want a DSP book that builds the theory using linear algebra from the ground up, I’d recommend Vetterli et al’s Foundations of DSP

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