Implementing Software Defined Radio (SDR) Technology
Explore the world of Software Defined Radio (SDR) technology through the conversion of analog signals to digital for efficient processing. Learn about SDR implementation, digital vs. analog processing, and Flex Radio's contribution to industry, military, and amateur radio use since 2003.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
Software Defined Radio (SDR) and its Implementation Brandon Graham W0GPR
What is SDR Instead of relying on RLC circuits, a raw, lightly filtered analog signal is converted to the digital domain to be further processed by digital systems RF Front End ADC/DAC Computer Antenna I,Q P.C., Laptop, Netbook, or Embedded processor R.F. High Quality Sound Card I,Q Front End
Digital vs Analog Digital Discrete Digital Signal Processing DSP Filtering Phase Frequency Time Power Analog Continuous Filtering Power amplifier
Flex Radio Manufacturer of SDRs for Industry, Military and Amateur use starting in 2003 HF transceivers ranging from QRP to 100 watts Flex 1500 QRP/transverter IF Signature series Contest serious radio *Flex 3000 *Flex 5000 *SDR 1000 *discontinued
Power SDR Graphical User Interface (GUI) Radio s buttons and knobs Signal Processing Filtering, DSP, Audio input and output shaping, etc Rig control Frequency, band, tuner Program interface VSPs, VACs, out to digital modes, logging, ext. aux
Computer system/Software VAC Virtual Audio Cable VSP Manager Virtual Com/Serial Port Com-0-Com DDU Til Logging Digital Mode Program Remote Operation Processor RAM Screen usage Quirks
The system setup Flex 3000 Computer VSP Manager PowerSDR Com Single VAC Pair 1 VAC Pair 2 FireWire DDU Til VAC FL-DIGI WSJT-X N1MM+
Pros / Cons of SDR over Analog Pros Filter visualization Filter manipulation Control of settings Visually based displays Panafall, etc. DSP systems and control Cons Quirky Visually demanding Computer intensive Software setup Need for multiple monitors and mouse Not EmComm Ready
Remote Operation Controlling computer, not radio Everything must be powered up at radio and ready for control Easier with digital over voice modes Lag Control of accessory programs and screens
WebSDR University of Twente Netherlands Website designed for internet linked SDR receivers Mostly centered on ham bands. http://websdr.ewi.utwe nte.nl:8901/ http://www.websdr.org /
Other SDR Systems $20 Dongle Nooelec.com SDR SoftRock HPSDR ANAN Genesis Radio Rfspace Google is a friend! Always New stuff added Experimentation vs. Solid Systems Many different programs http://www.abrohamne alsoftware.com/product s.php?cat=10
