0000000000852282

AUTHOR

A. Scaglione

showing 2 related works from this author

On the Fidelity of IEEE 802.11 commercial cards

2006

The IEEE 802.11 D CF protocol is known to be fair in terms of long-term resource repartition among the contending stations. However, when considering real scenarios, where commercial 802.11 cards interact, very unpredictable as well as sometimes surprising behaviors emerge. Motivation of this paper is to investigate the reasons of the very evident disagreement between the theoretical IEEE 802.11 DCF protocol models and its practical implementations. Inparticular, we try to characterize the card behavior not only in terms of perceived throughput, but also in terms of low-level channel access operations. In fact, the simple throughput analysis does not allow to identify what affecting paramet…

Signal processingCommunication channels (information theory); Internet; Signal processing; Wireless telecommunication systems; Baseband signals; Carrier sense function; MAC layer; Network protocolsComputer scienceMAC layerWireless local area networks (WLAN)backoff algorithmCommunication channels (information theory)IEEE 802.11Wireless telecommunication systemsNetwork protocolsThroughput (business)InternetBaseband signalsChannel allocation schemesSIMPLE (military communications protocol)Settore ING-INF/03 - Telecomunicazionibusiness.industryComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSPhysical layerCarrier sense functionThroughputNetwork interface controllerEmbedded systemResource allocationbusinessComputer networkCommunication channel
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Efficient FPGA Implementation of an Adaptive Noise Canceller

2006

A hardware implementation of an adaptive noise canceller (ANC) is presented. It has been synthesized within an FPGA, using a modified version of the least mean square (LMS) error algorithm. The results obtained so far show a significant decrease of the required gate count when compared with a standard LMS implementation, while increasing the ANC bandwidth and signal to noise (S/N) ratio. This novel adaptive noise canceller is then useful for enhancing the S/N ratio of data collected from sensors (or sensor arrays) working in noisy environment, or dealing with potentially weak signals.

Computer scienceBandwidth (signal processing)Real-time computingSignal synthesisElectroencephalographyBioelectric potentialsLeast mean squares filterSignal-to-noise ratioGate countError analysisElectronic engineeringHardware_ARITHMETICANDLOGICSTRUCTURESField-programmable gate arrayEvoked PotentialsActive noise control
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