Hacker News with Generative AI: Signal Processing

Coding Neon Kernels for the Cortex-A53 (destevez.net)
Some weeks ago, I presented at FOSDEM my work-in-progress high performance SDR runtime qsdr. I showed a hand-written NEON assembly implementation of a kernel that computes \(y[n] = ax[n] + b\), which I used as the basic math block for benchmarks on a Kria KV260 board (which has a quad-core ARM Cortex-A53 at 1.33 GHz). In that talk I glossed over the details of how I implemented this NEON kernel.

Software, ARM, Performance Optimization, Signal Processing

23 points by yeko 5 days ago | 10 comments

Show HN: Resonate – real-time high temporal resolution spectral analysis (alexandrefrancois.org)
Resonate is a low latency, low memory footprint, and low computational cost algorithm to evaluate perceptually relevant spectral information from audio (and other) signals.

Audio Analysis, Software, Signal Processing, Real-time Analysis

76 points by arjf 11 days ago | 30 comments

What is GNU Radio? (gnuradio.org)
GNU Radio is a free & open-source software development toolkit that provides signal processing blocks to implement software radios.

Software Development, Signal Processing, Software Radios

34 points by tripdout 12 days ago | 3 comments

AMD NPU and Xilinx Versal AI Engines Signal Processing in Radio Astronomy (2024) [pdf] (astron.nl)

Signal Processing, Radio Astronomy, Hardware, Artificial Intelligence

69 points by transpute 13 days ago | 29 comments

The Fourier Transform: A tutorial introduction (sheffield.ac.uk)
The Fourier Transform is a fundamental tool in the physical sciences, with applications in communications theory, electronics, engineering, biophysics and quantum mechanics.

Mathematics, Signal Processing, Education, Physics

4 points by teleforce 23 days ago | 1 comments

FPGA-Based Implementation of Signal Processing Systems (2nd Edition) (wiley.com)
An important working resource for engineers and researchers involved in the design, development, and implementation of signal processing systems

FPGA, Signal Processing, Engineering, Hardware

12 points by teleforce 28 days ago | 0 comments

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 112 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 138 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 154 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 160 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 165 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 178 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 182 days ago | 46 comments

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

History, Telecommunications, Signal Processing, Engineering

42 points by teleforce 256 days ago | 24 comments

Median filtering (2022) (crisluengo.net)

Image Processing, Signal Processing, Computer Vision, Filtering Techniques

94 points by todsacerdoti 277 days ago | 13 comments

Of Analog Signal Filtering (lcamtuf.substack.com)

Signal Processing, Electronics

54 points by zdw 288 days ago | 20 comments

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