Method of modulation and demodulation of a digital signal, in particular in a frequency band affected by flat fading, associated modulator and demodulator
AssigneeThales
InventorsBruno Le Breton, Pierre Vasseur, Patrick Bureau
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Abstract
A method of modulating a digital signal of width L in frequency on a given useful frequency band is described The digital signal is separated into N blocks bn (1≦n≦N). The given useful frequency band is split into N contiguous parts Pn. Channels Cn, of width ln in frequency, lying within an associated part Pn, are defined. The channels Cn are separated, a distributing of each block of digital signals bn over the associated channel Cn.
Claims18
A method of modulating a digital signal of width L in frequency on a given useful frequency band comprising:
- separating the digital signal into N blocks bn (1≦n≦N),
- splitting the given useful frequency band into N contiguous parts Pn,
- defining channels Cn, of width ln in frequency, lying within an associated part Pn, the channels Cn being separated,
- distributing each block of digital signals bn over the associated channel Cn.
A receiver of digital signals conveyed on a given useful frequency band by a transmitter comprising a demodulator wherein:
- a decoder associated with the error corrector coder of the transmitter receiving the digital signal recombined ŝ[m] by the demodulator.
A receiver of digital signals conveyed on a given useful frequency band by a transmitter comprising:
- a demodulator, wherein
- a deinterleaver associated with the interleaver of the transmitter receiving the digital signal recombined ŝ[m] by the demodulator,
- a decoder associated with the error corrector coder of the transmitter receiving the digital signal recombined deinterleaved ĉ[m] by the deinterleaver.
Dependencies are inferred from the claim text.