Exploració per tema "Error statistics"

Ara es mostren els items 1-20 de 23

    • Adaptive Beamforming for High Bit Rate Services in the FDD Mode of UTRA 

      Mestre Pons, Francesc X.; Nájar Martón, Montserrat; Antón Haro, Carles; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      Most time-reference beamforming algorithms suffer from severe beampattern distortion effects when applied to high bit rate services in WCDMA, causing serious performance degradation in terms of output BER, especially at ...

    • Application of error modeling at the output of maximum likelihood decoder to concatenated coded 16 PSK 

      Salembier Clairon, Philippe Jean (Institute of Electrical and Electronics Engineers (IEEE), 1989)
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      The authors study the performance of coded 16 PSK (phase shift keying) (inner code) concatenated with a Reed-Solomon (RS) code (outer code). The overall redundancy introduced by the codes is 33% (spectral efficiency 2.7 ...

    • Array joint detection for C/TDMA systems in UMTS environments 

      Antón Haro, Carles; Rodríguez Fonollosa, José Adrián; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 1998)
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      Two array-based schemes for intracell and intercell interference suppression are proposed. In both cases, the spatial and temporal characteristics of the propagation are jointly exploited by placing a narrowband beamformer ...

    • Average block error probability in the reverse link of a packet DS/CDMA system under Rayleigh fading channel conditions 

      Pérez Romero, Jordi; Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04)
      Article
      Accés obert
      Analytic expressions have been derived for the probability density functions of the total signal-to-interference ratio when considering mixed-type interference sources in the reverse link of a DS/CDMA packet radio system ...

    • Average block error probability in the reverse link of a packet ds/cdma system under rayleigh fading channel conditions 

      Pérez Romero, Jordi; Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon (2000-04)
      Article
      Accés obert
      Analytic expressions have been derived for the probability density functions of the total signal-to-interference ratio when considering mixed-type interference sources in the reverse link of a DS/CDMA packet radio system ...

    • BER improvement using optical gain clamped amplifier for burst transmission and critical cases studies 

      Zannin, Marcelo; Ennser, Karin; Taccheo, Stefano; Careglio, Davide; Solé Pareta, Josep; Aracil Rico, Javier (IEEE Press and Wiley, 2009-03-22)
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      This paper demonstrates significant BER improvement in burst traffic transmission using optical-gain clamped amplifiers. Critical chaotic cases are identified for peculiar burst sequences and their impact in transmission ...

    • Bidirectional coherent PON with ONU based on reused direct-modulated LO 

      Cano Valadez, Iván Nicolás; Bottoni, Fabio; Velásquez Micolta, Juan Camilo; Presi, Marco; Ciaramella, Ernesto; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We demonstrate a bidirectional coherent PON based on a direct-modulated upstream signal reused as LO. The proposed system achieves -46/-48 dBm downstream/upstream sensitivity at BER=10-3.

    • Chip level simulation of the downlink in UTRA-FDD 

      Olmos Bonafé, Juan José; Ruiz Boqué, Sílvia (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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      The specifications of UMTS Terrestrial Radio Access (UTRA) for the physical layer of the downlink make use of orthogonal variable spreading factor (OVSF) codes to preserve the orthogonality between downlink channels of ...

    • Early pre-FEC BER degradation detection to meet committed QoS 

      Pérez Vela, Alba; Ruiz Ramírez, Marc; Fresi, Francesco; Sambo, Nicola; Cugini, Filippo; Velasco Esteban, Luis Domingo; Castoldi, Piero (Optical Society of American (OSA), 2017)
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      Accés restringit per política de l'editorial
      Early optical layer BER degradation detection is proposed to trigger affected demands re-routing, targeting at reducing SLA violation. Results show that the proposed detection and re-routing algorithms noticeably reduce ...

    • Enhanced MDIR receiver for space-time dispersive channels 

      Vidal Manzano, José; Cabrera-Bean, Margarita; Agustín de Dios, Adrián; Lagunas Hernandez, Miguel A. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
      Article
      Accés obert
      A particular property of the matched desired impulse response receiver is introduced in this paper, namely, the fact that full exploitation of the diversity is obtained with multiple beamformers when the channel is ...

    • Error rate analysis and optimal power allocation in multiple access relay channels with analog network coding 

      Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Accés restringit per política de l'editorial
      In this paper, we examine multi-source multi-relay systems that employ Analog Network Coding for which we provide a two-fold contribution: i) We derive a closed-form upper bound of the average symbol error rate (SER) ...

    • High-SNR analytical performance of spatial multiplexing MIMO systems with CSI 

      García Ordoñez, Luis; Palomar, Daniel P.; Pagès Zamora, Alba Maria; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-11-30)
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      Accés obert
      In this paper, we investigate the average and outage performance of spatial multiplexing multiple-input multiple-output (MIMO) systems with channel state information at both sides of the link. Such systems result, for ...

    • Joint antenna diversity and combined DFE/decoding of trellis coded modulation on frequency-selective fading mobile radio channels 

      Gelonch Bosch, Antonio José (Institute of Electrical and Electronics Engineers (IEEE), 1993)
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      A Monte Carlo simulation study of a combined FDMA/TDMA slow frequency-hopping trellis coded adaptive receiver for multipath Rayleigh fading channels is presented. The receiver structure, first proposed by Proakis (1989) ...

    • New bounds on RAKE structures for DS-CDMA over frequency-selective Rayleigh fading channels 

      Calvo Zorrilla, Sergio; Vázquez Grau, Gregorio (IEEE IEEE, 1996)
      Text en actes de congrés
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      An upper bound is derived for the probability of error in an asynchronous binary direct-sequence spread-spectrum multiple-access communications system operating over frequency selective Rayleigh fading channels. A coherent ...

    • On a mutual information and a capacity bound gap of pilot-aided MIMO channels 

      Pastore, Adriano; Joham, Michael; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      For single-user MIMO channels with partial re ceiver CSI, we study the difference between a lower bound and two alternative upper bounds of the mutual information achieved with Gaussian codebooks. These differences are ...

    • Optimal array combiner and sequence detector in mobile radio channels 

      Vidal Manzano, José; Lagunas Hernandez, Miguel A.; Pérez Neira, Ana Isabel; Rodríguez Fonollosa, Javier (1998)
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      The use of spatial diversity at the receiver front-end together with a sequence detector implies a joint design problem of the spatial combiner and the sequence detector impulse response. This joint design is usually faced ...

    • Optimal two-point static calibration of measurement systems with quadratic response 

      Pallàs-Areny, Ramon; Jordana Barnils, José; Casas Piedrafita, Óscar (American Institute of Physics, 2004-11-10)
      Article
      Accés restringit per política de l'editorial
      Measurement devices and instruments must be calibrated after manufacture to correct for component and assembly tolerances, and periodically to correct for drift and aging effects. The number of reference inputs needed for ...

    • Performance evaluation of space-time block coding using a realistic mobile radio channel 

      Carrasco Espinosa, Héctor; Delgado Penin, José Antonio; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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      This paper presents a performance evaluation of space-time block coding (STBC) employing a realistic mobile radio channel model in macrocellular and urban environments. The bit error rate (BER) is computed by Monte-Carlo ...

    • Performance of blind equalization with higher order statistics in indoor radio environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...

    • Performance of Blind Equalization with Higher Order Statistics in Indoor Radio Environments 

      Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José (1997-05)
      Article
      Accés obert
      This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments applied to 4-QAM time division multiple access (TDMA) indoor radio communication systems. In particular, we have ...