Adjacent Channel Interference Cancellation Scheme
Yukitoshi Sanada · 2005
Abstract-Inthispaperanadjacentchannelinterference (ACI) cancellationschemeformulti-channelreceptionwithundersamplingandinvestigated.Low-IFreceiverarchitectureisusedinthemulti-channelreceptionscheme.However,inthissystem,thesignalintheadjacentchannelcausesinterferencetothedesiredsignal.ACIcancellationschemewithanalogfilterbankhasbeenproposedtomitigatetheinfluencefromtheadjacent channel[8]. Undersamplingtechniqueisappliedinthissysteminordertolowertherequiredsamplingfrequencyandpowerconsumption.Theeffectsoftheadjacentchanneltotheundersamplingtechniqueinthisschemeisinvestigatedthroughtheexperiment. I.INTRODUCTIONThoughtheroaming capability hasbeen specified intheIEEE802.11 standard, wirelessLANis not able to handlequickroamingforVoIP applications.Therefore, multi-channel reception is required forVoIP over WLAN.Oneofthereceiverarchitecture applicable forsuch appli- cationsis a low-IFreceiver[1 j[2]. Inthelow-IF receiver, the IF is setto berelativelylowerthanthatintheconventionalIFreceivers.Thelow-IFreceiveris