Patent ID: 7145959
Filing Date: 2006-12-05
Classification: H04B,H04L

Abstract:
1. A method for using a group of pilot signals to enhance a data signal within an orthogonal frequency division multiplexing (OFDM) multiple-access scheme having a plurality of OFDM transmitters using at least overlapping frequency spectrums, during at least overlapping time periods, in at least overlapping geographic areas, comprising: receiving a plurality of data signals and a plurality of pilot signals on a plurality of antenna elements, the received plurality of data signals having a plurality of data-signal components each being uniquely associated with an antenna element from the plurality of antenna elements, the received plurality of pilot signals having a plurality of pilot-signal components each being uniquely associated with an antenna element from the plurality of antenna elements, each group of data signals from the plurality of data signals being uniquely associated with a group of pilot signals from the plurality of pilot signals, each group of pilot signals from the plurality of pilot signals being uniquely associated with its own code from a plurality of codes, each code from the plurality of codes being uniquely associated with an OFDM transmitter from the plurality of OFDM transmitters; performing, in parallel, the following for each group of pilot signals from the plurality of pilot signals: