Genesis Radio G-40 SDR
What is Software Defined Radio?
A Software Defined Radio (SDR) system is a radio communication system where components that have typically been implemented in hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors. etc.) are instead implemented using software on a personal computer or other embedded computing devices. While the concept of SDR is not new, the rapidly evolving capabilities of digital electronics are making practical many processes that were once only theoretically possible. The term "Software Defined Radio" was coined in 1991 by Joseph Mitola, who published the first paper on the topic in 1992. However software-defined radios have their origins in the defense sector since the late 1970s in both the U.S. and Europe.
A basic SDR may consist of a computer (PC) equipped with a sound card, or other analog-to-digital converter, preceded by some form of RF front end. Significant amounts of signal processing are handed over to the general purpose processor, rather than done using special-purpose hardware. Such a design produces a radio that can receive and transmit a different form of radio protocol (sometimes referred to as a waveform) just by running different software. Software radios have significant utility for the military and cell phone services, both of which must serve a wide variety of changing radio protocols in real time.
In the long term, software-defined radio is expected by its proponents to become the dominant technology in radio communications.
Software Defined Radio and Amateur (Ham) Radio
A typical amateur software-defined radio of home made design uses a direct conversion receiver and low power transmitter. Unlike direct conversion receivers of the more distant past, the mixer technology are now based on the quadrature sampling detector and the quadrature sampling exciter. The receiver performance is directly related to the dynamic range of the analog to digital converters (ADCs).
First generation SDRs used a standard PC sound card to provide ADC functionality. The newer software defined radios use embedded ultra-high performance ADCs that provide higher dynamic range and are more immune to noise and RF interference.
A fast PC performs the digital signal processing (DSP) operations using software which is usually amateur-written, specific for the radio hardware. The SDR software performs all of the demodulation, filtering - both radio frequency and audio frequency- signal enhancement. Uses include every common amateur modulation: Morse code, single sideband modulation, and a variety of digital modes.
Introducing GENESIS G40 : Amateur Radio SDR Transceiver Kit
GENESIS G40: 40m All-mode 5W SDR Radio Transceiver KIT
G40 is a monoband 40m all-mode 5W SDR transceiver designed by YU1LM and produced and distributed as a kit by VK1AA of GenesisRadio.
Read More at:















