Nyquist pulse shaping

1. What is Nyquist pulse shaping?
2. What is Nyquist criterion pulses?
3. Why is pulse shaping done?
4. What is a pulse shaping filter?

What is Nyquist pulse shaping?

Pulse shaping is one technique used in communication to overcome the degradation of signals due to ISI. Pulse shaping involves the process of choosing the time-domain and spectral shape of the symbols so that the pulses do not spread or overlap.

What is Nyquist criterion pulses?

Nyquist proposed a condition for pulses p(t) to have zero-ISI when transmitted through a channel with sufficient bandwidth to allow the spectrum of all the transmitted signal to pass. Nyquist proposed that a zero–ISI pulse p(t) must satisfy the condition.

Why is pulse shaping done?

Note that the pulse shaping filter not only reduces intersymbol interference (ISI), but that it also reduces adjacent channel interference. Thus, pulse shaped filtering allows for the implementation of frequency division multiplexing (FDM) and a subset of FDM known as orthogonal frequency division multiplexing (OFDM).

What is a pulse shaping filter?

A pulse shaping filter is used in communication channels to manipulate a waveform or pulses to have the desired shape in the time domain. A pulse shaping filter can be a physical circuit, but normally it's a mathematical function that is used as a signal processing algorithm.