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function g=comp_pchirp(L,n)

%COMP_PCHIRP  Compute periodic chirp

%   Usage:  g=comp_pchirp(L,n);

%

%   `pchirp(L,n)` returns a periodic, discrete chirp of length *L* that

%   revolves *n* times around the time-frequency plane in frequency. *n* must be

%   an integer number.

%

%   This is a computational routine. Do not call it unless you have

%   verified the input parameters.



%   AUTHOR : Peter L. Søndergaard

%   TESTING: OK

%   REFERENCE: OK



l= (0:L-1).';

X = mod(mod(mod(n*l,2*L).*l,2*L)*(L+1),2*L);

g = exp(pi*1i*X/L);