Patent ID: 7450490
Filing Date: 2008-11-11
Classification: H04L

Abstract:
1. A method of communication using Orthogonal Frequency Division Multiplexing (‘OFDM”), the method comprising the steps of: generating bit streams b inserting prefixes as guard intervals in said sample streams, transmitting said OFDM symbols from said transmitter to a receiver, using information from said prefixes to estimate the Channel Impulse Response (H using the estimated Channel Impulse Response (Ĥ  where J is the square root of −1, N is the useful OFDM symbol size, D is the size of the prefix vector, and m is an integer, and further performing the multiplication by a matrix proportional to  where β  calculating the frequency shifted CIR coefficients  performing a component-by-component division  performing a multiplication by a matrix proportional to  extracting the N equalized samples corresponding to the k  transforming the symbol ŝ^(k) into frequency domain by performing a Fourier Transform: S