H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/52 (2006.01) H04B 1/10 (2006.01)
Patent
CA 2636589
Some embodiments provide a method, system, and apparatus for interference cancellation at the baseband of a receiver. A wireless communication device, having a transmitter and receiver, is provided with an adaptive circuit that cancels interference caused by transmit signals (or other signals) leaked or bled onto the receiver at baseband to facilitate detection of a received signal of interest. Some implementations provide for a circuit that approximately reconstructs the second and third order components caused by the nonlinear response of the down-conversion chain of a receiver. This reconstructed signal is then subtracted from the composite received signal to obtain a received signal of interest.
Dans quelques modes de réalisation, l'invention concerne un procédé, un système et un dispositif servant à supprimer les parasites au niveau de la bande de base d'un récepteur. Un dispositif de communication sans fil comportant un émetteur et un récepteur est pourvu d'un circuit adaptatif qui annule les parasites provoqués par des signaux d'émission (ou d'autres signaux) qui ont envahi le récepteur au niveau de la bande de base, de manière à faciliter la détection d'un signal reçu en particulier. Quelques modes de réalisation concernent un circuit reconstruisant approximativement les composantes de deuxième et troisième ordre provoquées par la réponse non linéaire de la chaîne de conversion de réception d'un récepteur. Ce signal reconstruit est ensuite soustrait du signal composite reçu afin d'obtenir un signal reçu particulier.
Komninakis Christos
Sahota Gurkanwal S.
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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