Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2007-10-02
2007-10-02
Burd, Kevin (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S143000
Reexamination Certificate
active
10189003
ABSTRACT:
A multi-user detection method and device for a receiver in a multi-carrier code division multiple access telecommunication system, each communication to or from a user of the system being coded with a signature, the signal received by said receiver being decomposed into a first plurality of frequency componentsThe frequency components are subjected to a first filtering matched to the respective signatures of a second plurality of users and to the common or respective responses of the transmission channels associated to said communications to or from said users.The output of the first filtering is subjected to a forward filtering followed by an estimation of the symbols transmitted to or by the users.The estimated symbols are subjected to a backward filtering, the output of said backward filtering being subtracted from the output of the forward filtering prior to the estimation.
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