%原型濾波器設計
function Prototype=ProtoFilter(subCarrNum,gama)
D= subCarrNum*gama-1;        % Order
Fc = 1/subCarrNum;      % Cutoff Frequency
flag = 'noscale';  % Sampling Flag

% Create the window vector for the design algorithm.
win = hamming(D+1);

% Calculate the coefficients using the FIR1 function.
Prototype = fir1(D, Fc, 'low', win, flag);