卷积的几种计算方法以及程序实现FFT算法.doc

数字信号处理 function r = test(L x = rand(1 , L ; tic N = length(x ; X1 = x * exp(-j * 2 * pi / N * (0:N-1(0:N-1 ; t1 = toc ; tic X2 = ditany(x ; t2 = toc ; r = t1 / t2 ; %max(abs(X1 - X2 return ; function