Hacker News with Generative AI: Signal Processing

Choosing an op-amp for your project (lcamtuf.substack.com)
This article assumes some familiarity with the principles of op-amps; if you need to jog your memory, start with an earlier write-up on signal amplification.

Electronics, Op-amps, Signal Processing

169 points by zdw 14 days ago | 88 comments

Noise Filtering Using €1 Filter (2020) (jaantollander.com)
This article explores the 1€ Filter, a simple, but powerful algorithm for filtering noisy real-time signals.

Signal Processing, Algorithms, Real-time Data

92 points by dsego 40 days ago | 38 comments

Phased Array Microphone (2023) (benwang.dev)
A 192-channel phased array microphone, with FPGA data acquisition and beamforming/visualization on the GPU. Phased arrays allow for applications not possible with traditional directional microphones, as the directionality can be changed instantly, after the recording is made, or even be focused at hundreds of thousands of points simultaneously in real time.

Audio Engineering, Hardware, Signal Processing, Software

600 points by bglazer 57 days ago | 187 comments

Phased Array (wikipedia.org)
In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio waves that can be electronically steered to point in different directions without moving the antennas.

Antenna Theory, Radio Waves, Electronic Engineering, Signal Processing

64 points by downboots 62 days ago | 27 comments

New textbook teaches students about matrix methods and their real world apps (engin.umich.edu)
A new textbook, Linear Algebra for Data Science, Machine Learning, and Signal Processing, is being unveiled for use in classes that explore the many applications of matrix methods to real world data.

Linear Algebra, Data Science, Machine Learning, Signal Processing, Education

77 points by teleforce 67 days ago | 33 comments

'Alien' Signal Decoded (esa.int)
White dots arranged in five clusters against a black background. This is the simulated extraterrestrial signal transmitted from Mars and deciphered by a father and a daughter on Earth after a year-long decoding effort.

Space Exploration, Artificial Intelligence, Signal Processing, Science

13 points by gnabgib 80 days ago | 0 comments

Deep dive: the instability of op-amps (lcamtuf.substack.com)
This article assumes some familiarity with signal amplification and the knowledge of basic op-amp circuits. If you need a refresher, start here.

Electronics, Signal Processing, Op-Amps

115 points by lapnect 84 days ago | 46 comments

The history of orthogonal frequency-division multiplexing (2009) (ieee.org)

History, Telecommunications, Signal Processing, Engineering

42 points by teleforce 158 days ago | 24 comments

Median filtering (2022) (crisluengo.net)

Image Processing, Signal Processing, Computer Vision, Filtering Techniques

94 points by todsacerdoti 179 days ago | 13 comments

Of Analog Signal Filtering (lcamtuf.substack.com)

Signal Processing, Electronics

54 points by zdw 190 days ago | 20 comments

The Fourier Transform: What's Wrong with It? (endaq.com)