SDR Communication Kit

Transmitter Operation

For the transmitter operation, communication waveforms are generated from the software tools running on the host computer at a low intermediate frequency (IF) of 12 KHz. SCK connects to USB port and appears as a Sound Card on Host computer. The generated waveform is sent to SCK in analog form via digital to analog converter (DAC) of SCK. SCK takes this IF signal and performs frequency up-conversion to the desired carrier frequency. This signal is further amplified, filtered and transmitted by the antenna. SCK is configurable from the host computer through USB interface and user can control transmission parameters like carrier frequency and output power level etc. from the host computer.

Receiver Operation

At the receiver end another SCK receives the RF signal through its antenna and performs a series of receiver operations like channel filtering, low noise amplification and frequency down-conversion from RF to IF. This IF signal, which is available is sampled by the SCK's ADC and is provided as an input to the software application on the host computer through USB Interface. User can either develop his own Matlab/Simulink models or can use Renzym Software Framework (RSF) application for performing receive filtering, quadrature down-conversion and sampling rate reduction to produce complex baseband (in-phase and quadrature) signal. This baseband signal is further processed for receiver tasks like carrier and timing synchronization, equalization and error correction coding etc. Renzym SDR Framework (RSF) can be used to perform above mentioned receiver tasks for a wide range of modulation schemes.