一个很有用的程序，包括广义互相关函数GCC时延估计，一种流形学习算法（很好用），结合PCA的尺度不变特征变换(SIFT)算法，单径或多径瑞利衰落信道仿真。- A very useful program, Including the generalized cross-correlation function GCC time delay estimation, A fluid manifold learning algorithm (good use), Combined with PCA scale invariant feature transform (SIFT) algorithm, Single path or multipath Rayleigh fading channel simulation.