Distance estimation

The invention discloses a method. The method comprises steps: at each first time, signal receiving at a receiver is started periodically; the received signals are converted to determine data in the received signals; the determined data and reference data are compared; and the difference between the determined data and the reference data is used for estimation for correcting the multiple of the first time. Thus, the distance between the receiver and the signal source is determined. 种方法，包括：在每个第时间，周期性地启用在接收机处对信号的接收；变换接收到的信号，以确定接收到的信号中的数据；对确定的数据与参考数据进行比较；以及使用确定的数据与所述参考数据之间的差来估计对所述第时间的倍数的修正，从而确定所述接收机与所述信号的源之间的距离。