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Träfflista för sökning "WFRF:(Östberg Per) ;pers:(Arenas Julia Martinez)"

Sökning: WFRF:(Östberg Per) > Arenas Julia Martinez

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1.
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2.
  • van de Beek, Jaap, et al. (författare)
  • Synchronization of a TDMA-OFDM frequency hopping system
  • 1998
  • Ingår i: Pathway to a global wireless revolution. - Piscataway, NJ : IEEE Communications Society. - 0780343204 ; , s. 1290-1294
  • Konferensbidrag (refereegranskat)abstract
    • In this paper we present a Time Division Multiple Access-Orthogonal Frequency Division Multiplexing (TDMA-OFDM)-based radio interface proposal for the Universal Mobile Telecommunication System (UMTS). We focus on synchronization and present an implementable algorithm for the tracking of the mobiles' time and frequency offsets at the base station in the uplink. This algorithm is based on recently developed estimation methods that use redundancy introduced by the cyclic prefix. A modified Maximum Likelihood (ML) estimator for the Additive White Gaussian Noise (AWGN) channel is used to meet both implementational requirements and performance requirements for frequency-selective fading multiuser environments. Simulation results for a typical UMTS mobile channel environment show that the uncoded symbol error rate of a coherently modulated system using our synchronization scheme is virtually indistinguishable from that of a system with no time and frequency offset.
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3.
  • Wahlqvist, Mattias, et al. (författare)
  • Description of Telias OFDM based proposal
  • 1997
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This document gives an overview of Telias OFDM based proposal for UTRA and should be cinsidered as an input to the OFDM concept group within SMG 2. The document describes the fundamental frame structure, principles of the detection, modulation, coding and synchronization. Further, the channel structure, the resource management and handover principles are outlined
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  • Resultat 1-3 av 3

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