Patent ID: 7339999

Claim:
A method of estimating a frequency response of a wireless channel in a wireless communication system, comprising: obtaining at least two groups of received pilot symbols for at least two sets of pilot subbands, one group of received pilot symbols for each set of pilot subbands, wherein each of the at least two sets of pilot subbands is used for pilot transmission in a different symbol period; obtaining at least two initial frequency response estimates based on the at least two groups of received pilot symbols, one initial frequency response estimate for each group of received pilot symbols; deriving an overall channel impulse response estimate based on the at least two initial frequency response estimates, wherein the overall channel impulse response estimate comprises more taps than the number of pilot subbands in each of the at least two sets of pilot subbands; and deriving an overall frequency response estimate for the wireless channel based on the overall channel impulse response estimate.