1. The antenna at the receiving end receives the signal
2. The sub board at the receiving end demodulates the electrical signal: it is sent to the ADC in N210 for analog-to-digital conversion, and then sent to FPGA for digital down conversion, and then the processed data is transmitted to the computer through the network port for further processing
3, the computer stores the data, then carries out the FFT calculation, and finally draws the drawing program to show the result of calculation.