Patent ID: 9231836
Filing Date: 2016-01-05
CPC Classification: H04L

Claim Text:
1. A method for estimating a channel by a device in wireless communication systems using Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple access (OFDMA), the method comprising steps of: obtaining a Maximum Likelihood (ML) estimate of a said channel frequency response and said channel on pilot locations; performing a hypothesis test on said ML estimate to obtain information about a structure of said channel; using information obtained from said hypothesis test about said structure of said channel to derive a shrinkage target; obtaining refined channel frequency response estimates on said pilot locations and refined channel estimates by using a biased estimator to shrink said ML estimate towards said shrinkage target; and interpolating said refined channel frequency response estimates and/or said refined channel estimates using a filter to get a set of complete channel frequency response estimates and channel estimates of said channel over time-frequency block.