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AMATEUR RADIO - HOMEBREW SDR
Contributors: John Petrich, W7FU, Mariana Varotto, WA7EE, Pablo Sala, KI7OJL
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    • Overview of GNU Radio Digital Signal Processing Software
    • From Block Diagram to DSP Software with GNU Radio
  • SDR Projects
    • Advanced SDR Hardware – described
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    • Universal Multi-Mode Transceiver DSP
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  • Presentations and Publications
    • GNU Radio and I & Q Explained: ARRL Digital Communications Conference September 2014
    • GNU Radio Part 1 and Part 2: ARRL QEX Magazine July, September 2014
    • UHF SDR Transceiver: MicroHAMS Digital Conference March 2016
    • Digital Signal Processing: ARRL NW Division Convention, June 2016
    • UHF SDR Transceiver and Ham Radio System: ARRL NW Division Convention, June 2016
    • UHF – VHF – Microwave SDR Transceiver, ARRL Division Convention, June 2017
    • Advanced SDR Ham Radios for Microwave: Microwave Update, October 2017
    • Microwave SDR: Software and Hardware, Microwave Update, October 2018
    • 9-band VHF/Microwave SDR Station: DUBUS Vol. 47, 4/2018
    • Make The Flow Graph Work For You – Talk: Ham Radio online video seminar, January 16, 2021
    • SDR Experience: PNW Microwave Group, Microwave Update, October 4, 2024
  • Miscellanea
    • Test and Measurement Utilities using GNU Radio
    • Simple Audio Oscillator Project
    • Advanced Audio Oscillator Project with Multi-Rate Sampling and FFT Display
    • SDR Receiver DSP Project
    • DSP for an Elemental SDR Receiver
    • DSP for an Elemental SDR Transmitter
    • Quadrature Multiplier – demonstration
    • Home made mmWave mixer experiments
    • Direct RFIC Synthesizer and FPGA NCO Offset Tuning
    • “Why” and “How” of I and Q
    • ‘Click Tune’ Frequency Changes with the FFT GUI
    • DSP Frequency Memory with Preset Frequency Variables
    • Zero frequency receiver artifact

Month: June 2018

“Why” and “How” of I and Q

June 29, 2018 w7fuw7fu

Why “I” and “Q”? “I” and “Q” processing is a prominent concept in discussions of Digital Signal Processing (DSP).  Why? …

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‘Click Tune’ Frequency Changes with the FFT GUI

June 27, 2018 w7fuw7fu

A useful SDR operating aid with a GNU Radio DSP is the ‘click tune’ function.  ‘Click Tune’ means that the…

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DSP Frequency Memory with Preset Frequency Variables

June 25, 2018 w7fuw7fu

A very useful feature of an operating GUI is the ability to program Preset Frequencies without editing the basic frequency…

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Zero frequency receiver artifact

w7fuw7fu

A typical situation with SDR receivers is the presence of the zero frequency or ‘DC’ artifact in the receiver output. …

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Recent Posts

  • Home made mmWave mixer experiments February 11, 2019
  • Direct RFIC Synthesizer and FPGA NCO Offset Tuning July 1, 2018
  • “Why” and “How” of I and Q June 29, 2018

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