Patent ID: 8780956
Filing Date: 2014-07-15
Classification: H04L

Abstract:
1. A method for determining a smooth window length in channel estimation the method comprising: obtaining autocorrelation values of pilot signals, wherein the autocorrelation values comprise at least two first autocorrelation values and at least one second autocorrelation value wherein the autocorrelation values of the pilot signals are autocorrelation values in non-zero correlation intervals; determining a speed range according to symbols of the first autocorrelation values or according to the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range; wherein a calculation formula for obtaining the autocorrelation values of the pilot signals is as follows: wherein R(k) is the autocorrelation value of the pilot signal, k is a correlation interval and not equal to 0, M is the preset number of multi-path search periods, and R wherein L wherein N is the number of pilot signal symbols within each time slot, A