Introduction Basic signal properties(dc, rms, dBm, and power Fourier transform and spectra Linear systems and linear distortion Bandlimited signal and sampling Discrete Fourier transform 。 Bandwidth of signal2 Introduction • Basic signal properties(dc, rms,dBm, and power) • Fourier transform and spectra • Linear systems and linear distortion • Bandlimited signal and sampling • Discrete Fourier transform • Bandwidth of signal