SDR Radio DSP Digital Demodulation Short Wave FM MW SSB CW HAM Radio ReceiverSDR Radio DSP Digital Demodulation Short Wave FM MW SSB CW HAM Radio Receiver This product is based on the Tayloe Quadrature Product Detector method to achieve frequency mixing. The clock generator Si5351 generates two quadrature square wave signals with variable frequency as excitation, and realizes an ultra low noise ZIF zero IF receiver. The IQ signal obtained after mixing is output to the CODEC codec and collected by the MCU, and the DSP algorithm