Patent ID: 8761277

Claim:
A system comprising: an average channel estimator circuit, responsive to an Orthogonal Frequency Division Multiplexing (OFDM) symbol stream and a set of channel path delays, comprising: an extraction circuit for extracting an OFDM symbol from the OFDM symbol stream; an input circuit for receiving a set of channel path delays corresponding to the OFDM symbol, each path delay corresponding to one of a plurality of transmission paths between a transmitter and a receiver; and an estimator circuit for estimating, for each of the plurality of transmission paths, an average path gain corresponding to each of the set of channel path delays based on least squares and known noise; a curve generator circuit communicatively coupled to the average channel estimator circuit, and responsive to stored average impulse responses, comprising: a selection circuit for selecting, from storage, average channel gains of neighboring OFDM symbols; a rate determining circuit for determining a rate of change of the neighboring average channel gains; and a model selection circuit for identifying a best-fit average free curve for the stored channel impulse responses, wherein the model selection circuit selects an order of the best-fit average free curve based on the determined rate of change and wherein an average of the best-fit average free curve comprises an average channel response; and a carrier data estimator circuit communicatively coupled to the average channel estimator circuit, responsive to the OFDM symbol stream and average impulse responses from the average channel estimator circuit, for estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference and channel noise, comprising: a vector generating circuit for creating a vector with zeroes and inserting average path gains in associated delay locations; and an equalization circuit for calculating equalization coefficients.