Bandwidth

Bandwidth of cosine of bandlimited signal

Bandwidth of cosine of bandlimited signal
  1. What is a bandlimited signal?
  2. How do you find the bandwidth of a sine wave?
  3. Is a cosine band-limited?

What is a bandlimited signal?

A signal is said to be band-limited if the amplitude of its spectrum goes to zero for all frequencies beyond some threshold called the cutoff frequency.

How do you find the bandwidth of a sine wave?

Bandwidth is the range of frequencies from lowest to highest. For a sinewave, lowest equals highest, so bandwidth is zero.

Is a cosine band-limited?

cos(wt) is only theoretically band-limited if infinite in length.

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