Patent ID: 7830994
Filing Date: 2010-11-09
Classification: H04B,H04L

Abstract:
1. A channel estimator system for high mobility OFDM channels comprising: a path delay estimator circuit, responsive to an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise for identifying a set of channel path delays; an average channel estimator circuit, responsive to the OFDM symbol stream and the identified set of channel path delays, for determining the average channel impulse response for the identified set of channel path delays in each symbol; a storage circuit for storing the average channel impulse responses for the identified channel path delays; a curve generator circuit, responsive to said stored average channel impulse responses, for generating a path delay curvature for each channel path delay in each symbol; a carrier data estimator circuit, responsive to the OFDM symbol stream and said average impulse responses from said 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; a regenerator circuit, responsive to said curve generator, and path delay estimator circuit and carrier data estimation circuit, for reconstructing said inter-channel interference noise; and a subtraction circuit for subtracting said reconstructed inter-channel interference noise from said OFDM symbol stream resulting in a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.