Search results for "DS-CDMA"

showing 2 items of 2 documents

Efficient Hybrid Emergency Aware MAC Protocol for Wireless Body Sensor Networks

2018

International audience; In Body Sensor Networks (BSNs), two types of events should be addressed: periodic and emergency events. Traffic rate is usually low during periodic observation, and becomes very high upon emergency. One of the main and challenging requirements of BSNs is to design Medium Access Control (MAC) protocols that guarantee immediate and reliable transmission of data in emergency situations, while maintaining high energy efficiency in non-emergency conditions. In this paper, we propose a new emergency aware hybrid DTDMA/DS-CDMA protocol that can accommodate BSN traffic variations by addressing emergency and periodic traffic requirements. It takes advantage of the high delay …

Computer sciencedelayAccess control02 engineering and technology[INFO.INFO-SE]Computer Science [cs]/Software Engineering [cs.SE]DTDMAlcsh:Chemical technology01 natural sciencesBiochemistryArticleAnalytical Chemistry[INFO.INFO-IU]Computer Science [cs]/Ubiquitous ComputingBSN[INFO.INFO-CR]Computer Science [cs]/Cryptography and Security [cs.CR]energy consumption0202 electrical engineering electronic engineering information engineeringWirelesslcsh:TP1-1185Electrical and Electronic EngineeringInstrumentationMACbusiness.industryNetwork packet010401 analytical chemistryComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS020206 networking & telecommunicationsEnergy consumption[INFO.INFO-MO]Computer Science [cs]/Modeling and SimulationAtomic and Molecular Physics and Optics0104 chemical sciences[INFO.INFO-MA]Computer Science [cs]/Multiagent Systems [cs.MA]packet drop[INFO.INFO-ET]Computer Science [cs]/Emerging Technologies [cs.ET][INFO.INFO-DC]Computer Science [cs]/Distributed Parallel and Cluster Computing [cs.DC]businessWireless sensor networkEfficient energy useComputer networkDS-CDMAOPNETSensors
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Blind source separation based interference suppression schemes for OFDM and DS-CDMA

2015

In statistical wireless signal processing, extraction of unobserved signals from observed mixtures can be achieved using Blind Source Separation (BSS) algorithms. Orthogonal Frequency Division Multiplexing (OFDM) and Direct Sequence-Code Division Multiple Access (DS-CDMA) can be pronounced as the well established predominant air interface communication techniques. Consequences of an effort taken and counteractive solutions to diminish the undesirable influences encountered within the wireless air interface of those techniques with aid of BSS schemes are disclosed. Filter coefficients for the receiver are ascertained with the support of a set of energy functions and the iterative fixed point…

Orthogonal frequency-division multiplexingCode division multiple accessComputer sciencebusiness.industryAir interface0206 medical engineering020206 networking & telecommunications02 engineering and technology020601 biomedical engineeringBlind signal separationdownlinkslow fadingFilter designInterference (communication)blind source separationTelecommunications link0202 electrical engineering electronic engineering information engineeringElectronic engineeringFadingElectrical and Electronic EngineeringTelecommunicationsbusinessDS-CDMAOFDMTelecommunication Systems
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