1. A method of channel response determination for a wireless communication system operating over a plurality of channels, comprising: generating, by a device in the wireless communication system, a first vector of channel samples from channel estimations obtained by using a training signal; generating, by a device in the wireless communication system, a second vector of regularized channel responses by applying to the first vector of channel samples a regularization algorithm; wherein a second difference between consecutive regularized channel responses of the second vector is less than a first difference between consecutive channel samples of the first vector; and wherein generating a second vector comprises multiplying the first vector with a third matrix, which is an inverse of a sum of an identity matrix and a fourth matrix comprising constants, which are operative to decrease the second difference between the consecutive regularized channel responses of the second vector.