Software Defined Radio Resources
SDR Resources
Software Defined Radio (SDR) technology has transformed amateur radio, allowing hams to use flexible, reconfigurable transceivers where much of the signal processing is handled by software. This approach enables operators to experiment with new modes and bands simply by updating code, rather than modifying hardware. SDRs are popular for their versatility, from basic receivers for listening to HF bands to advanced transceivers capable of complex digital modes and satellite operation.
This category collects a variety of SDR projects and resources for hams interested in building or understanding these radios. Operators can find details on homebrew designs like the sBitx and SoftRock kits, which are popular for their low cost and educational value. There are also projects for specific applications, such as the Amsat DSP Satellite Transceiver, alongside general purpose high-performance SDR platforms like HPSDR. Many resources also cover the underlying Digital Signal Processing (DSP) concepts essential for SDR development and operation.
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This page, authored by VU2ESE, delves into the sBitx, a Software-Defined Radio (SDR) designed for homebrewers. The content covers the hybrid SDR circuit, software, user interface, hacking/modifying the sBitx, performance, and more. It explores the various components of the sBitx, including the exciter, filters, amplifiers, digital circuit, and modems. The page aims to provide information and guidance for hams interested in building their own SDR. Readers will learn about the capabilities, features, and adaptability of the sBitx, making it a valuable resource for DIY radio enthusiasts. -
The DSP Satellite Transceiver is a conceptual transceiver designed as a dedicated unit for amateur satellite operators. The initial concept was brought about by the lack of satellite functionality on modern amateur radio transceivers, and the specialized requirements of the ham radio operator who utilizes OSCAR amateur satellites. -
A project for a SDR receiver by Juan Domenech Fernandez -
Softrock Version 6.1 Software Defined Radio experience and modifications by DF9CY -
This document describes the DIFFERENCE of mode HAM to the official broadcast DRM standard -
The DSP-10 is an amateur-radio, software-defined 2-meter transceiver that can be built at home. It operates not only on SSB, FM and CW, but also on four Weak-Signal modes. Features are tailored to operation on VHF, UHF and Microwave frequencies. By W7PUA -
Dual phase coherent Software Defined Radio using two K2 Elecraft receivers and programming in Matlab/Simulink. -
The HPSDR is an open source hardware and software project intended as a next generation Software Defined Radio for use by Radio Amateurs -
Experimental Methods in DSP design. The author explains how a software defined radio works to help other amateurs with their learning. This set of tutorials takes you from how to write a single component to a fully working SDR. -
TinySDR for 80m band and ZetaSDR for 40m band -
SDR Forum - organization dedicated to promoting the development, deployment and use of software defined radio technologies for advanced wireless systems. -
A curated collection of Software Defined Radio (SDR) projects, categorized by sampling methods and hardware architectures. Includes links to software -
A blogspot blog about Software Defined Radio -
The SDR-908 is a software defined radio designed specifically for portable use, without the bother of being tethered to a PC or soundcard for the modulation/demodulation processing performed in this kind of radio. -
DF9CY using Softrock RTX on 50 MHz -
5000+ member discussion group for the low-cost series of SoftRock SDR receiver and transceiver kits. -
This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band -
Detailed build log for the Genesis Radio G40 40m QRP SDR transceiver kit, covering assembly, testing, and troubleshooting. -
This project enhances Arjan te Marvelde's uSDR-pico by integrating a waterfall display feature. By adding an ILI9341 240x320 2.4" TFT display and modifying the software, the goal is to provide a panadapter to the existing transceiver. Initially developed with Visual Studio, the code was later migrated to Arduino IDE for Raspberry Pi Pico compatibility. The focus remains on preserving the original software, primarily enhancing the dsp.c file for waterfall implementation. -
This project describes a DIY all band HF SDR transceiver. Built around a Softrock 6.3 kit, it boasts a 20W homebrew amplifier and ATmega168 microcontroller for USB control. An LCD displays frequency, power, and SWR. Automatic LPF selection and SWR protection enhance functionality. Compatible with Rocky and PowerSDR software, this project provides a cost-effective and powerful HF SDR transceiver for hobbyists. -
A blog dedicated to SDR and in particular to HPSDR experimentation and tests by John G0ORX -
A blod dedicated to SDR and RTL-SDR featuring sdr new and product reviews -
The Hermes-Lite is a low-cost direct down/up conversion software defined amateur radio HF transceiver based on a broadband modem chip and the Hermes SDR project. It is entirely open source and open hardware, including the tools used for design and fabrication files. Over 300 Hermes-Lite 2.0 units have been successfully built. -
The author has build the Hermes-Lite SDR v1 and v2 versions describing with a very accurated text and picture the process. Additionally has documented measurements for each component -
Author is currently developing the HS4HF 4 Band HF Radio Transceiver with a 5.0-inch TFT display, following their previous HSM1 model. They are also working on the Radio HSDRA, an All Band SDR HF Radio Transceiver with unique features such as DSP Digital Modulation, 100W final power, automatic antenna tuner, and more. The development includes a wide 5.0-inch display, touch screen, and various advanced functionalities. Stay updated with the latest developments in the world of HAM radio with Hambuilder Team. -
The Homebrew uSDX SDR TRX is an experimental transceiver primarily designed for CW and Digital modes due to limitations in meeting FCC requirements for SSB. Developed from the QRP Labs QCX, it incorporates advanced SDR features while utilizing an 8-bit ATMEGA328P. The µSDX community fosters open-source development with various design streams and versions, encouraging collaboration and sharing among enthusiasts. -
These pages document some of the experiments with KB9YIG\'s Soft Rock 40 receiver -
M1GEO's DIY HF converter project for the FunCube Dongle Pro, extending its reception down to 0 Hz using a 100 MHz up-conversion scheme. -
An SDR project, MDSR modulator-demodulator software radio, made using an inexpensive converter and a pc. MDSR has a transceiver and a receiver converters. -
This project revisits a minimalist software-defined radio (SDR) receiver built using a Raspberry Pi Pico, now optimized for simplicity and affordability. Designed for breadboard assembly with through-hole components, the receiver covers 0–30MHz, supporting CW, SSB, AM, and FM modes with an OLED display and spectrum scope. Key improvements include enhanced frequency accuracy, reduced op-amp saturation, and lower-cost components. Powered by three AAA batteries, it delivers standalone operation for global signal reception. Ideal for hobbyists, the design fosters experimentation and is documented with firmware and schematics available online. -
Construct the Peaberry, a SoftRock-compatible SDR transceiver. This project is aimed to build an amateur radio transceiver that operates on the medium or short wave bands -
Learn quadrature modulation through interactive flash programs. These programs will allow you to learn about quadrature modulation and quadrature demodulation without getting overwhelmed by math. -
A new SDR radio concept developed by N6QW as an experimental 5W SDR transceiver for the 40 meter bands. Radio and Rig (RADIG) is a term conied by the author. -
An SDR classification model edited ty Christophe F4DAN The model consists in describing a SDR with letters and digits, each one indicating the value of the corresponding key parameter. -
Working with SDR#, adjusting frequency correction and basic setup. -
A web site for those interested in ham radio Software Defined Radio (SDR). SDR Zone provide forums, reviews and user blogs relating to any type of SDR -
Setting Up the SDR-1000 for WSJT using VAC 4.03 -
DF9CY Softrock RXTX Software Defined Radio Transceiver (SDR) -
Setting up the necessary Software for the Softrock 6.1 is a bit tricky, images and screenshots hopefully bring some light into the dark -
The T41-EP SDT is an open-source software defined transceiver designed by Albert F Peter (AC8GY) and Dr. Jack Purdum (W8TEE) with contributions from others. This detailed guide covers the design, theory, and assembly of the transceiver, making it suitable for both beginners and experts in SDR. Learn about Digital Signal Processing and how it is implemented in the T41-EP, as well as the modularity of its internal design. Kits are available for easy assembly, and a supportive community on SoftwareControlledHamRadio Groups.io provides additional resources for users. Note that software support for additional bands is in progress, offering potential future upgrades. -
The TangerineSDR is a Modular Software Defined Radio Project with the following objectives, Development of SDR radios that allow experimentation, provide support to unaffiliated other groups, to provide hardware modularity, to allow varying performance, To allow users to experiment with differing configurations. -
Introduces Software Defined Radio (SDR) and Digital Signal Processing (DSP) concepts, providing a curated collection of links to white papers and -
UHSDR stands for UniversalHamSoftwareDefinedRadio. The project provides the firmware to run standalone HAM transceivers. It currently supports STM32F4 and STM32F7 MCU based QSD designs. -
SDR Project for a compact amateur radio software defined radio trasceiver covering HF bands all mode. Website includes schematics, element PCB, pictures, movies, firmware and elements bom. -
Linrad and SDR-IQ Software Defined Receiver on Shortwave -
Software Defined Radio Projects, HF Receivers and Transceivers projects by YU1LM/QRP