Bradford Stimpson (@bstimpson) header
Bradford Stimpson (@bstimpson) profile picture

Bradford Stimpson

@bstimpson

Tech geek. Makes dumb machines learn and talk to one another. Writes stuff in between. Husband, Dad, Engineer, Manager, Homegineer. Impeccably Bald.

 Toronto, Ontario
about.me/bradstimpson
Joined July 2009
  • Tweets3.9K
  • Following1.9K
  • Followers1.1K
483Media
Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)Photo by Bradford Stimpson (@bstimpson)
An interview with Davis King @nulhom creator of the #dlib toolkit - @PyImageSearch buff.ly/2rFLNLT
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Bradford Stimpson retweeted
Jiao Xianjun (@jxjputaoshu) profile picture
Jiao Xianjun@jxjputaoshu14 May 2024
Open-source Bluetooth Low Energy chip? 10 years ago the SDR BTLE project was created. I found it was used in some places: github.com/JiaoXianjun/BTLE/… . Recently I add Verilog with detailed algorithm description and python model for the next 10 years: github.com/JiaoXianjun/BTLE/…
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
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Kjetil Teigen Hansen (@mrTeigen) profile picture
Kjetil Teigen Hansen
@mrTeigen10 May 2024
Where I live, my current cellular provider is not good. Found out that my phone is on 4G 800MHz, and seems like I am the only one in this area using it. It is dead silent, so I decided to turn off Wi-Fi and show you the «magic» of cellular! I start with Safari and open up a few random webpages before I do a speedtest. @Aaronia_AG #SpectranV6 #SpecAn #4G
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I recently joined the #OCP Evenstar project and will be co-chairing with @tdnjunisco. The project aims to revolutionize the industry with an open radio unit that is #5G and #ORAN ready. Watch our kick-off meeting here: youtube.com/watch?v=aHIUq74M…
OCP Evenstar Kickoff Call (February 15, 2024)

OCP Evenstar Kickoff Call (February 15, 2024)

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

youtube.com
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The special breakout session will feature discussions led by telecom analyst Stéphane Téral on the global requirements for Open RAN, followed by presentations and discussions with regional stakeholders, including operators, manufacturers, and integrators interested in Open RAN
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Please stay tuned for updates about the event here: opencompute.org/summit/regio…
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Bradford Stimpson retweeted
Daniel Estévez (@ea4gpz) profile picture
Daniel Estévez@ea4gpz19 Apr 2024
New blog post: LTE downlink: PDSCH. I show how to decode the PDSCH (downlink data) transmissions step by step in a Jupyter notebook written from scratch. I use the SIB1 as an example, but decode all the transmissions into a PCAP file for analysis with Wireshark.🧵
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Bradford Stimpson retweeted
Dave Jones (@eevblog) profile picture
Dave Jones
@eevblog11 Apr 2024
Sadly a respected EEVblog forum member is in end of life care. He has released his high accuracy book as a multi part PDF. You can check it out here: eevblog.com/forum/metrology/… EDIT: I collated the full book, it's excellent, check it out here: eevblog.com/files/High-Accur…
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Bradford Stimpson retweeted
Mahesh Venkitachalam (@mkvenkit) profile picture
Mahesh Venkitachalam@mkvenkit1 Sep 2022
Very happy to tell you that @groupgetscom has set up a pre-launch page for our Humble iCE FPGA dev board. Please sign up below to indicate interest, so I can plan for production. Thanks for all the encouragement so far🙂 groupgets.com/campaigns/1062…
Image from Mahesh Venkitachalam (@mkvenkit)
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Bradford Stimpson retweeted
Daniel Estévez (@ea4gpz) profile picture
Daniel Estévez@ea4gpz6 Aug 2022
New blog post: Decoding Danuri. A write up of how to decode the Korean lunar satellite, Danuri / KPLO, with @gnuradio and what do the telemetry frames look like. destevez.net/2022/08/decodin…
The GUI of a GNU Radio flowgraph, showing the spectrum of the telemetry signal and the BPSK constellation of the telemetry data.

ALT The GUI of a GNU Radio flowgraph, showing the spectrum of the telemetry signal and the BPSK constellation of the telemetry data.

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Bradford Stimpson retweeted
Tom Verbeure (@tom_verbeure) profile picture
Tom Verbeure@tom_verbeure8 Aug 2022
Reed-Solomon Error Correcting Codes from the Bottom Up tomverbeure.github.io/2022/0…
Image from Tom Verbeure (@tom_verbeure)
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Tom Verbeure (@tom_verbeure) profile picture
Tom Verbeure@tom_verbeure17 Jul 2022
I finally found some bad solder contacts that resulted in instabilities when handling the sphere. It’s rock solid now, I can roll it over the floor, and it looks stunning in person.
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Tom (@tdsepsilon) profile picture
Tom@tdsepsilon20 Jun 2022
Ever wanted to run @KismetWireless in a @Docker container, now's your lucky day! I used @ZimaBoard and @IceWhale CasaOS to set mine up with Wifi, Bluetooth, and RTLSDR ADSB monitoring. teaandtechtime.com/creating-…

Creating a WiFi Monitor with a Kismet Docker Container

In my quest to become more familiar with Docker I decided to create a container to run another wireless radio software called Kismet. Kismet is a wireless network and device detector, sniffer, ward…

teaandtechtime.com
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Bradford Stimpson retweeted
Daniel Estévez (@ea4gpz) profile picture
Daniel Estévez@ea4gpz18 Feb 2022
New blog post: Demodulation of the LTE uplink. A self-contained hands-on walk through the analysis of the uplink signal. The post assumes some knowledge of OFDM, but no previous knowledge of LTE. We demodulate some PUSCH slots that I have recorded from my phone. (1/9)
A waterfall of an LTE signal, showing different blocks corresponding to uplink transmissions using different time-frequency allocations. Both data and control transmissions are visible.

ALT A waterfall of an LTE signal, showing different blocks corresponding to uplink transmissions using different time-frequency allocations. Both data and control transmissions are visible.

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Bradford Stimpson retweeted
Jiao Xianjun (@jxjputaoshu) profile picture
Jiao Xianjun@jxjputaoshu17 Oct 2021
R&S #CMW270: #openwifi shows promising performance. EVM achieves 33~38dB! #AD9361 plays cool. W/O external LNA, sensitivity still achieves -74dBm (64QAM 5/6) to -88dBm (BPSK 1/2) (AD9361 needs signal stronger than -62dBm for good RX EVM). Similar to AR9271 COTS chip. Stay tune.
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
Image from Jiao Xianjun (@jxjputaoshu)
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Bradford Stimpson retweeted
Tom (@tdsepsilon) profile picture
Tom@tdsepsilon20 May 2021
This was a fun final project I created for a DSP course at university, so I decided to update it for my blog, as I learned a lot about beam forming processing and simulation. Hope it can help others as well! teaandtechtime.com/adaptive-…
Adaptive Beamforming with LMS

Adaptive Beamforming with LMS

In a traditional beamforming application, the goal is to design an antenna whose radiation pattern points in a specific direction instead of just being purely isotropic. This directionality can be …

teaandtechtime.com
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Bradford Stimpson retweeted
rtl-sdr.com (@rtlsdrblog) profile picture
rtl-sdr.com
@rtlsdrblog11 May 2021
Migou: A Low-Power Hybrid Radio Platform rtl-sdr.com/migou-a-low-powe…
Image from rtl-sdr.com (@rtlsdrblog)
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Awesome, got my post on @hackaday! Using Docker To Sail Through Open-Source Xilinx FPGA Development via @hackaday hackaday.com/2021/05/05/usin… #FPGA #Xilinx #OpenSource
Using Docker To Sail Through Open-Source Xilinx FPGA Development

Using Docker To Sail Through Open-Source Xilinx FPGA Development

Until a few years ago, developing for FPGAs required the use of proprietary locked-down tools, but in the last few years, the closed-source dam has burst, and open-source FPGA tools such as Yosys, …

hackaday.com
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