Diversity inOn-BodyCommunications Channels

Asmuchofthechannel variation isduetothemovementof On-body communication channels areusedinanincreasing thebody,simulation isdifficult andrequires many numberofapplications, including headsets andwristwatch computations ofvarious bodypostures. Simulation ofthe controllers formobile phones, andsystems foremergencywholebodyusingcommercial codes hasbeenpossible for personnel andforpersonal medical support. Inchannels forsometime, buttheir useinpredicting channel performance on suchsystems themovementofthebodycausessignificant moving bodies isnotwelldeveloped. fading, inaddition tothat caused byscattering fromthelocal environment. Thiscanbemitigated using diversity methods. In thispaper,theeffect of diversity in on-body Measurement results ofspace, andpattern diversity at2.45communication channels isdiscussed andresults presented GHz,using twoantenna typesispresented andresults fortwoantenna types at2.45GHz.Measurements ofangle of indicate that useful diversity gain canbeobtained, whichis arrival statistics atthisfrequency aredescribed andresults dependent onthespecific channel andantennatype. A given. Finally examples ofsimulations ofon-body channel switched beamantenna isalso usedtoestimate rayangle of forbodymovement arepresented. arrival statistics andresults aregiven. Simulation ofchannel andantenna performance whilst thebody ismoving isalso an 2 Diversity Measurements