宽带自适应射频取消电路全双工收音机操作原理测量.pdfVIP

WidebandSelf-AdaptiveRFCancellationCircuitfor

Full-DuplexRadio:OperatingPrincipleand

Measurements

∗†∗∗‡∗

TimoHuusari,Yang-SeokChoi,PetteriLiikkanen,DaniKorpi,ShilpaTalwar,andMikkoValkama

∗DepartmentofElectronicsandCommunicationsEngineering,TampereUniversityofTechnology,Finland

e-mail:timo.huusari@tut.fi,petteri.liikkanen@tut.fi,dani.korpi@tut.fi,mikko.e.valkama@tut.fi

†IntelCorporation,Hillsboro,Oregon,USA,e-mail:yang-seok.choi@.

‡IntelCorporation,SantaClara,California,USA,e-mail:shilpa.talwar@.

—ThispaperpresentsanovelRFcircuitarchitecturetheorderof20dBto30dBbetweenthetransmitandreceive

forself-interferencecancellationininbandfull-duplexradiochains.Inshared-antennadevices,ontheotherhand,circulator

transceivers.Thedevelopedcancellerisabletoprovidewidebandbasedapproaches[3],[7]aswellasstructuresbasedon

cancellationwithwaveformbandwidthsintheorderof100MHzelectricallybalancedhybrid-junctioncircuits[8]–[10]have

orbeyondandcontainsalsoself-adaptiveorself-healingfeaturesbeenreported,withisolationnumbersrangingtypicallyinthe

enablingautomatictrackingoftime-varyingself-interference

orderof20dBto40dB.Furthermore,theideaofdeploying

channelcharacteristics.Inadditiontoarchitectureandoperating

principledescriptions,wealsoprovideactualRFmeasurementsdual-portpolarizedantennasystemisreportedin[9].

at2.4GHzISMbanddemonstratingth