Multiuser detection method and device
First Claim
1. A method of detecting a plurality of transmitted symbols (dk(i)), each symbol belonging to one of a plurality of modulation constellations and spectrally spread before being modulated on a plurality (L) of carriers, said method comprising:
- a step of demodulating the plurality (L) of carriers to obtain a vector of signals including a received signal (r(i)); and
a step of spectral despreading the received signal (r(i)) in order to supply a vector characteristic of said received signal, said step of spectral despreading includinga step of searching, within an array of points (Λ
2,Ω
2) corresponding to said plurality of modulation constellations, for at least a closest neighbour of said characteristic vector.
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Accused Products
Abstract
Method of detecting a plurality of symbols (dk(i)) transmitted by or for a plurality K of users, each symbol belonging to a modulation constellation and being the subject of a spectral spreading before being modulated on a plurality L of carriers, the method comprising a step of demodulation (420) and a step of spectral despreading (430) of the received signal (r(i)) in order to supply a vector (y2(i), {tilde over (y)}2(i)) characteristic of the signal, and a step (450) of searching, within an array of points (Λ2,Ω2) generated by the symbols of the modulation constellations, for at least the closest neighbour of the vector.
22 Citations
12 Claims
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1. A method of detecting a plurality of transmitted symbols (dk(i)), each symbol belonging to one of a plurality of modulation constellations and spectrally spread before being modulated on a plurality (L) of carriers, said method comprising:
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a step of demodulating the plurality (L) of carriers to obtain a vector of signals including a received signal (r(i)); and a step of spectral despreading the received signal (r(i)) in order to supply a vector characteristic of said received signal, said step of spectral despreading including a step of searching, within an array of points (Λ
2,Ω
2) corresponding to said plurality of modulation constellations, for at least a closest neighbour of said characteristic vector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification