Patent ID: 6098161
Filing Date: 2000-08-01
Classification: H04L

Abstract:
A method of generating address of a coefficient memory for storing filtering coefficients of an OFDM signal having an OFDM transmission frame structure in which a pilot signal is carried by each X-th sample within one symbol of the OFDM transmission frame and the location of the pilot signal between adjacent symbols differs by Y samples, in an OFDM adaptive channel equalizer for equalizing the OFDM signal on updating the filtering coefficients in unit of group including Y samples based on the pilot signal along the frequency axis in the OFDM transmission frame, comprising the steps of:a) generating a symbol identification signal according to modulo-(Y+1) operation on symbol numbers within the OFDM transmission frame;b) detecting the location of the pilot signal within each symbol respective to the symbol identification signal of said step a);c) generating a first pulse signal synchronized with a sample clock according to the detection result of said step b);d) generating a write address of the coefficient memory using counting bits obtained by counting the first pulse signal of said step c) and the bits of the symbol identification signal;e) generating a second pulse signal by frequency-dividing the sample clock by Y; andf) generating a read address of the coefficient memory by counting the second pulse signal of said step e).