IEEE Transactions on Communications · 2004 · 46 citations · 15 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationPropagationWireless CommunicationsMultiple Access TechniquesPulse-width ModulationSpread Spectrum CommunicationUltra-wideband CommunicationWireless Channel ModelingWireless NetworksBit Error RateBit-error Rate AnalysisDirect Sequence Ultra-widebandDirect-sequence Spread SpectrumImpulse Radio Ultra-widebandTime-hopping Spread SpectrumTime-hopping Ultra-widebandUpper Bound Performance
Ultra-wideband (UWB) technology is characterized by transmitting extremely short duration radio impulses. To improve its multiple-access (MA) capability, UWB technology can be combined with traditional spread-spectrum techniques. So far, much of the research has focused on perfect power-control conditions and on employing time-hopping spread-spectrum with impulse radio using pulse-position modulated signals. In this letter, we outline the attractive features of direct-sequence (DS) UWB MA systems employing antipodal signaling and compare it with time hopping. Performance of DS-UWB communication systems, in terms of MA capability and bit-error rate performance, are evaluated under both perfect and imperfect power-control conditions. An upper bound on the total combined bit-transmission rate is derived.
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Moe Z. Win, R.A. Scholtz · IEEE Communications Letters · 1998 · 2.2K citations
Ultra-Wideband Wireless Systems
G. Aiello, Gerald D. Rogerson · IEEE Microwave Magazine · 2003 · 873 citations