Patent ID: 7769113

Claim:
A method for executing, as a function of a received signal, a procedure of channel estimation of a transmission channel with memory in a telecommunications system, the method comprising: estimating a delay spread associated to said channel, said estimating the delay spread including calculating a root mean square value of delay spread by evaluating crossings with a threshold level of a characteristic curve of a transfer function representing said channel, said evaluating of crossings including evaluating a first number of crossings, corresponding to a real part of said transfer function, and a second number of crossings, corresponding to an imaginary part of said transfer function, with the threshold level corresponding to a zero level; applying a mean operation to said first number of crossings and said second number of crossings, to obtain a mean number of crossings, wherein said telecommunications system operates according to an OFDM modulation; obtaining a value of rough estimation of the channel by demodulating the received signal; and supplying said root mean square value of delay spread to an operation involving fine channel estimation.