Signal Windowing

blackman(n) Returns a Blackman window of width n.

cheby(n, b) Returns a Chebyshev window of width n and parameter b.

costaper(n, a) Returns a cosine taper window of length n, with the percentage of raised cosine given by a.

gaussian(n, a) Returns a Gaussian window of width n; the parameter a controls the peak width.

hamming(n) Returns a Hamming window of width n.

hanning(n) Returns a Hanning window of width n.

kaiser(n, b) Returns a Kaiser window of width n and parameter b.

nuttall(n) Returns a Nuttall window of width n.

taprect(n) Returns a tapered rectangular window of width n.

triangular(n) Returns a triangular window of width n.

Arguments:

• n is an integer of at least 2. For Chebychev windows, n must be odd.
• a is the inverse of the Gaussian variance, a real number between 2 and 20, or, a is a percentage of tapered cosine in costaper, a real number between 0 and 1.
• b for Kaiser windows is a real number such that 2 < b < 20. b is a Chebychev sidelobe ripple, a real number greater than 1, typically b > 50.