2002 · 22 citations · 4 references
EngineeringComputer EngineeringElectrical EngineeringDigital CommunicationSystem-on-chip DesignWireless CommunicationsCommunication SystemsDigital Signal ProcessingMillimeter-wave CommunicationsMixed-signal Integrated Circuit DesignModulationRadio-frequency Integrated CircuitsAdaptive EqualizationConstraintsIndoor Channel ModelingIndoor PropagationOrthogonal Frequency-division MultiplexingPhysical Layer ProtocolsTransceiver ArchitecturesTransceiver Design
Emerging standards for broadband wireless LANs (WLANs) such as IEEE802.11a, Hiperlan-II and MMAC require orthogonal frequency division multiplex (OFDM) modulation for the physical layer (PHY) interface. OFDM modems were previously realized in the context of very high speed digital subscriber lines (VDSL) and digital audio broadcast (DAB). However, the WLAN application puts different constraints on the OFDM transceiver presented here because the terminals are portable. Therefore, an adaptive frequency domain equalizer is integrated to mitigate the variations of the indoor wireless channel. Fast programmable on-chip acquisition hardware supports burst mode communications.
4
A 70 Mb/s variable-rate DMT-based modem for VDSL
D. Veithen, P. Spruyt, T. Pollet et al. · 2003 · 24 citations
Engineering, Computer Engineering, Electrical Engineering +15