Spectrum Test System Based on XILINX FPGA

Abstract

Gaussian channel is a radio frequency communication channel, which contains the characteristics of specific noise spectral density of various frequencies, resulting in arbitrary distribution of errors in the channel. Gaussian channel, often referred to as weighted Gaussian white noise (AWGN) channel. This noise assumes that the power spectral density (PSD) is constant over the entire channel bandwidth, and the amplitude conforms to the Gaussian probability distribution. The system takes the system generator as the development platform, combines matlab with the modern communication comprehensive experimental platform, and simulates and comprehensively realizes the designed spectrum test system. The analog signal input port is designed. The received analog signal is converted into digital signal through ADC module in the system, the time domain signal is converted into frequency domain signal through fast Fourier transform, and then converted into analog signal through DAC module, and output to the display instrument for display.