Passband digital transmission

Discussion in 'Wireless & RF Design' started by Alfa_ET, Feb 26, 2011.

  1. Alfa_ET

    Thread Starter New Member

    Feb 26, 2011
    Good evening,

    I have a basic doubt about Spectrum analysis of digital signals in base band. The question is: I have a sign made up of a square wave and pulses in time domain given by the expression y(t) = p(t) * x(t). When is the power spectral density of signal y(t) is given by each of these expressions?
    1. Sy(f) = |Y(f)| ^ 2
    2. Sy(f) = |P(f)| ^ 2 Sx(f)

    Thanks for the help
    Greetings to the community


    Y(f) - Fourier transform of signal y(t)
    P(f) - Fourier transform of the signal p(t)
    Sx(f) - Spectral density power of the signal x(t)