Patent ID: 7203157
Filing Date: 2007-04-10
Classification: H04L

Abstract:
1. An equalization method for a downlink channel in a telecommunication system transmitting MC-CDMA symbols on a plurality of carrier frequencies, in which a plurality of links are established between a transmitter and a plurality of receivers in order to transmit a plurality of coded signals, each link using a distinct access code amongst N possible codes, a conjugate product of two possible codes being proportional to a possible code or to its conjugate wherein, for at least one receiver, said method comprises the steps of calculating a matrix (B, E) characteristic of said plurality of links, said step of calculating comprising calculating first the elements of a row or a column in a characteristic matrix and deducing other rows or other columns with a permutation of said elements; multiplying a received symbol with the matrix; and determining an estimated symbol based on the result of the multiplying step.