| 摘要 |
<p>The invention concerns a method for providing a signal with multicarrier modulation of density 1/(ξ0.τ0)=2, formed by successive symbols, each comprising M samples to be transmitted, and consisting of a set of 2M orthogonal carrier frequencies in the real sense, the interval between two neighbouring frequencies being equal to ξ0 and the interval between the transmitting times of two consecutive symbols, or symbol time, being equal to τ0, each of said carrier frequencies being modulated according to a common modulation prototype function g(t) with a truncation length of 2Lτ0, said method comprising, at each symbol time, the following steps: obtaining a set of 2M complex coefficients representing data to be transmitted; computing 2LM linear combinations from said resulting 2M complex coefficients, the weighting coefficients used in said combinations representing said prototype function g(t), so as to obtain 2Lm coefficients; summing said 2LM weighted coefficients in predetermined storage locations of a memory comprising 2LM storage locations representing 2L groups of M distinct partial sums, so as to gradually form, in said storage locations, over a duration of 2Lτ0, M samples to be transmitted; transmitting said samples for transmission.</p> |
