SDR DSP Shortwave HAM Receiver — Digital Demodulation (FM / MW / SSB / CW)

SDR radio with DSP-based digital demodulation, designed for shortwave reception and HAM use, supporting FM, MW, SSB and CW modes. The front-end uses the Tayloe Quadrature Product Detector technique for frequency mixing. A Si5351 clock generator provides two quadrature square-wave outputs at variable frequency to drive the detector, enabling quadrature mixing for I/Q demodulation.