Method and device for multi-service transmission with FC-OFDM modulation and corresponding receiver

A method comprising:

• transmitting data corresponding to a service from amongst several communications services implementing a same frequency-time transform (IFFT) of size M irrespective of the service in order to generate orthogonal multi-carrier symbols of M samples starting from data symbols including:
• during a frame setup, adding a cyclic extension of L=L1+L2 samples in order to obtain a sequence of M+L samples, and
• setting up the frame according to a configuration depending on the service, which allows a selection between no, one or several processing operations from amongst a padding, a discrete Fourier transform of size N and a spread for adapting the data prior to mapping at an input of the frequency-time transform, and
• the method comprises time-domain filtering according to a function ƒ(n) of the samples n of the sequence, L and M being non-zero natural numbers, L<M:
• f
• ⁡
• (
• n
• )
• =
• {
• a
• ⁡
• (
• n
• )
• n
• ∈
• [
• 0
• ,
• L
• -
• 1
• ]
• 1
• n
• ∈
• [
• L
• ,
• M
• -
• 1
• ]
• b
• ⁡
• (
• n
• )
• n
• ∈
• [
• M
• ,
• M
• +
• L
• -
• 1
• ]
• with a(n) and b(n) monotonic functions and with a2 (n)+b2 (n+M)=1 for n∈[0, L−1], L1≥0 and L2≥0.