Equalizing method in receivers using a combination of multiple carrier and code division multiple access modulating techniques
AssigneesFrance Telecom, Mitsubishi Electric Corporation, Telediffusion de France
InventorsJean-Francois Helard, Jean-Yves Baudais
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Abstract
The invention concerns a method for receiving a signal using a multiple carrier and code division multiple access modulation, comprising a demodulating step by application of a mathematical transform of the temporal domain to the frequency domain, a step which consists in equalizing the transformed signal and a step which consists in despreading the equalized signal. The invention is characterised in that said equalizing step takes into account, for each of the components of said transformed signal, perturbations affecting the carrier bearing said component and at least one other of said carriers and at least some of said spread codes.
Claims20
Method for reception of a signal implementing a modulation with multiple carriers and with multiple access by division of spread codes, of the type comprising a de-modulation stage by application of a mathematical transform from the temporal domain to the frequency domain, an equalisation stage of the transformed signal and a de-spreading stage of the equalised signal, characterised in that said equalisation stage comprises, for each of the components of said transformed signal, at least one equalisation element representative of disturbances affecting the carrier carrying said component, at least one equalisation element representative of disturbances affecting at least one other of said carriers, and at least one element representative of some of said spread codes.
Dependencies are inferred from the claim text.