Patent ID: 7715486

Claim:
A method of COFDM demodulation of successive symbols of a signal received from a transmission channel, each symbol comprising first carriers modulated in phase and/or in amplitude conveying data which depend on the symbol and second reference carriers called pilots having their frequency positions varying at least partly from one symbol to the next symbol, the method comprising, for each symbol, the determination of estimates of the transfer function of the channel for the symbol carriers, said determination comprising the successive steps of: determining, for each carrier of a first set of carriers from among the first carriers of said symbol such that, for the frequency positions of the considered carriers, symbols different from said symbol comprise pilots, a first estimate based on second estimates obtained for pilots having the frequency of said carrier; and determining, for each carrier of a second set of carriers from among the first carriers of said symbol, a third estimate based on some of the first estimates, wherein, for at least one carrier of the first set, the first estimate is further determined based on at least the third estimate determined for a carrier of a symbol received before said symbol at the same frequency as said carrier.