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Träfflista för sökning "WFRF:(Rohani Bijan) srt2:(2009)"

Sökning: WFRF:(Rohani Bijan) > (2009)

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1.
  • Rohani, Behrooz, et al. (författare)
  • On In-service Perceptual Speech Quality Monitoring in Cellular Radio Systems
  • 2009
  • Konferensbidrag (refereegranskat)abstract
    • A method for in-service monitoring of the end-user perceptual speech quality in cellular radio systems is proposed. This method incorporates the perceptual evaluation of speech quality (PESQ) algorithm to monitor the quality experienced by the end-user. Here, the monitoring is carried out at the transmitting side. In this case, the speech signal received by the end-user is estimated at the transmitter in accordance with a feedback signal. The performance of the proposed scheme has been investigated through extensive simulations for the Universal Mobile Telecommunication System (UMTS) using different speech coding rates and channel conditions. The results indicate that the proposed scheme can predict end-user quality with a root-mean-squared error (RMSE) of at most 0.15 using the mean opinion score (MOS) rating scheme. Such accuracy can be beneficial in applications such as radio resource management for satisfying the desired level of quality of service.
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2.
  • Rohani, Bijan, et al. (författare)
  • Erlang Capacity of UMTS Using Perceptual-based Power Control : An Analytical Framework
  • 2009
  • Konferensbidrag (refereegranskat)abstract
    • An analytical framework for calculation of Erlang capacity per cell of UMTS with perceptual-based power control is derived. A comparison of the capacity of the system using the proposed power control algorithm with its conventional counterpart is performed. This is supported by numerical results on Erlang capacity over a variety of system parameters for both considered power control approaches. It is shown that the use of perceptual speech quality metrics in power control results in a capacity gain of at least 10% over that of conventional UMTS.
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  • Resultat 1-2 av 2
Typ av publikation
konferensbidrag (2)
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refereegranskat (2)
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Rohani, Bijan (2)
Zepernick, Hans-Jürg ... (2)
Caldera, Manora (1)
Rohani, Behrooz (1)
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Blekinge Tekniska Högskola (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
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2009 (2)Ta bort avgränsningen

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