Communication system--signal and system review

Deterministic signals have three bandwidths: 3dB bandwidth, 0-point to 0-point bandwidth, and RMS bandwidth.

The bandwidth of the random signal (the bandwidth of the noise) is measured by the equivalent bandwidth,

A signal cannot be both limited in time and limited in bandwidth.

The main lobe bandwidth is defined for low-pass, 0-to 0-point bandwidth-to-band communication numbers.

3DB Bandwidth: Amplitude is 1/1.4 of peak value

The product of the pulse bandwidth and duration is a constant

The X DB bandwidth is the energy spectral density that is less than the peak xdb.

The energy bandwidth of P.

The Fourier transform of LTI's impulse response is called frequency domain response, and Laplace transform is called transfer function. The energy spectrum of the output signal equals the energy spectrum of the input signal multiplied by the square of the modulus of response in the frequency domain.

Communication system--signal and system review