Patent ID: 8374266

Claim:
An iterative channel estimation method for Inter-Carrier Interference (ICI) cancellation in multi-carrier systems, comprising: providing a pilot-based channel model for frequency domain features having two parts: a first part comprising a summation of T fixed matrices each paired one-to-one with a different second part comprising T unfixed variables, wherein pilots are allocated to a user equipment (UE) to decrease correlation between different paths and one symbol includes at least (L +1)(T +1) pilot symbols such that L is a maximum multipath delay and T is a rank number of the number of pairings required to describe the ICI; and a receiver partially estimating the ICI with a predetermined linear estimation algorithm comprising a first round of estimating the contribution to the ICI of the lowest rank matrix for all paths and then removing the estimated ICI contribution of all paths of the lowest rank from the received signals and an iteratively performed second round estimating and removing the estimated ICI contribution of a next highest rank until a pre-determined stopping condition is achieved.