Patent ID: 7907593

Claim:
A method of performing channel estimation and time tracking in a multi-carrier communication system, comprising: receiving, at a receiver, one or more symbols over a plurality of frequency subbands; obtaining a plurality of initial impulse response estimates for a plurality of different groups of the plurality of frequency subbands, wherein each group includes a different plurality of frequency subbands selected from among N frequency subbands in the system, where N is an integer greater than one; processing a first set of initial impulse response estimates, from among the plurality of initial impulse response estimates, to obtain a first impulse response estimate of length L 1 and used for data detection and decoding, where L 1 is an integer one or greater; and processing a second set of initial impulse response estimates, from among the plurality of initial impulse response estimates, to obtain a second impulse response estimate of length L 2 and used for time tracking, wherein L 2 is longer than L 1 .