I. Eizmendi

Universidad del País Vasco / Euskal Herriko Unibertsitatea, Leioa, Basque Country, Spain

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Publications (24)9.76 Total impact

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    ABSTRACT: This paper provides a review of the second generation of terrestrial digital video broadcasting standard (DVB-T2). DVB-T2 is the evolution of DVB-T and, together with DVB-S2 and DVB-C2, inaugurated a new transition from the first-generation digital broadcasting systems, similar to the transition from analog-to-digital systems. In this paper, the most relevant features of DVB-T2 are explained in detail, along with their benefits and trade-offs. This paper also presents a comprehensive review of the laboratory and field trial results available so far. Especial emphasis is placed in the results of the measurements carried out to test the mobile reception and the novel technologies as multiple input single output and time frequency slicing.
    IEEE Transactions on Broadcasting 01/2014; 60(2):258-271. · 2.09 Impact Factor
  • I. Landa, A. Arrinda, M. Velez, I. Eizmendi
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    ABSTRACT: The variation of the radio noise level in indoor locations has been analyzed in this communication. Three measurements campaigns have been carried out in 2008, 2010, and 2012, in the medium wave band below 2 MHz. The trials are long-term measurements at three frequency channels centered at 1359 kHz, 1720 kHz and 1910 kHz. Five locations sited in buildings in the area of Bilbao, in the north of Spain have been studied. The noise level variations over a five year period are analyzed and compared with the ones predicted by ITU-R P.372, for outdoor locations in city environments. As a result, updated indoor noise levels are given for planning radio systems in MW band.
    IEEE Transactions on Antennas and Propagation 01/2014; 62(6):3398-3401. · 2.33 Impact Factor
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    ABSTRACT: This paper provides minimum C/N values for correct reception of DVB-T2 signals under fixed reception conditions. The C/N values are obtained after analyzing the results of field and laboratory trials. The field measurements were taken in a middle-sized city, along 33 locations, with MFN and SFN configurations. Both the system configuration options (constellation and code rate, FFT size, pilot pattern, and rotated constellations) and the propagation channel are taken into account to quantify their influence on the reception requirements. DVB-T was also measured and both systems are compared. The final objective is to provide the broadcasters with some guides based on measurements to optimize the DVB-T2 networks by choosing the parameters that best fit their needs.
    IEEE Transactions on Broadcasting 01/2013; · 2.09 Impact Factor
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    ABSTRACT: This paper presents the field trials carried out inside the Barcelona Exhibition Centre (Spain) for testing the DVB-T2 portable reception in indoor environments. A key point of these trials is the ability to measure different configurations of DVB-T2 at once, due to the new T2-Lite profile standardized in April 2012. This allows the simultaneous transmission of two completely different T2 profiles in a mixed mode using the Future Extension Frame (FEF) capability. For this paper, two mixed modes have been measured and the results will show their performance in a portable indoor scenario, providing reference values that can be used for network planning purposes.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2013 IEEE International Symposium on; 01/2013
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    ABSTRACT: This paper presents a platform for carrying out advanced DVB-T2 system performance measurements in a flexible way. The platform is based on a software receiver with a boosted performance achieved by using both cluster computing and GPU processing. IQ samples of the received signals can be recorded in the lab or during field trials for offline analysis using this platform. This methodology has been tested both in the lab and in three different DVB-T2 measurement campaigns and the results obtained are analyzed in the last section of the paper.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2013 IEEE International Symposium on; 01/2013
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    ABSTRACT: This paper analyses the possibility of receiving high data rate multimedia services in the non-stationary urban mobile scenario using the digital video broadcast standard DVB-T2. The work focuses on the complex urban mobile environment and presents a comparison between the different configuration parameters and the data rates associated to different video services. The study is based on the experience operating an experimental DVB-T2 network in urban environments, where portable and vehicular reception scenarios have been tested. The results show the system performance and the feasible video quality. The paper explores the coverage for various video services, including HDTV and 3DTV options, and proposes some scenarios for the deployment of broadcasting networks transmitting multimedia services to mobile receivers.
    Signal Processing: Image Communication. 09/2012; 27(8):925–933.
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    ABSTRACT: This paper presents the field trials carried out in Barcelona (Spain) for testing the reception of DVB-T2 with multiple PLPs in urban mobile environments. A key aspect of these trials is the capability to measure different configurations of DVB-T2 at the same time and with the same reception conditions. It is possible thanks to the new feature included in the standard and called multiple PLP. These Physical Layer Pipes allow the allocation of several services with different robustness in the same multiplex. For this paper DVB-T2 signals with 3 PLPs have been measured and the results will show the performance of each PLP in the complex urban mobile reception scenario.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2012 IEEE International Symposium on; 06/2012
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    ABSTRACT: This study discusses the relevance of the methodology applied to process indoor noise measurements in the medium-wave band in order to provide reference noise levels. The knowledge of noise levels is necessary for planning radio services and for analyzing the influence of radio noise in the human body. This work presents a description of the parameters for characterizing the noise-measurement antennas, and explains how these parameters are determined. The terms for specifying the noise intensity and the methods for processing radio-noise measurements are described. The characteristics of an ideal and an actual antenna in the medium-wave band are presented, showing the relevance of the difference between the ideal and actual antennas when radio-noise levels are calculated. This work presents the differences in the noise levels given by different processing methods, using an actual antenna and a theoretical antenna. Finally, the results of several recently published noise measurements that have been processed by different methods are presented, and compared with the values predicted by ITU-R P.372.
    IEEE Antennas and Propagation Magazine 01/2012; 54(6):214-226. · 1.18 Impact Factor
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    ABSTRACT: The impact of single frequency operation on the performance of dense SFN broadcast networks targeting mobile reception is investigated and a novel methodology for accurate calculation of the single frequency network (SFN) effect in network planning is presented.
    Electronics Letters 01/2012; 48(15):955-956. · 1.04 Impact Factor
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    ABSTRACT: This paper presents a procedure for testing the mobile reception performance of DVB-T2 in urban environments. The main goal of this procedure is to reduce and simplify the measurement and processing stages, which are especially critical in the non-stationary and heterogeneous conditions of urban mobile reception. This procedure is supported by field trials carried out by the authors in these environments. The paper is focused on the DVB-T2 standard, but the methodology is also applicable to other new digital broadcasting systems designed for mobile urban reception, such as T2Mobile or DVB-NGH systems.
    01/2011;
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    ABSTRACT: In this paper, the main objective is to prove that the most known equalization algorithms for OFDM signals in time variant channels with mobile reception scenarios are part of a generic theoretical model. This model will be developed mathematically, and based on it, a general classification for channels in terms of their time variability will be presented.
    01/2011;
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    ABSTRACT: This paper presents the results of laboratory tests carried out to study the performance of DVB-T2 in presence of multipath in fixed reception with rooftop antenna. The typical multipath cause in this scenario is a Single Frequency Network (SFN) reception. A range of relative levels and delays between the main path and one echo are tested to obtain the C/N requirements for each case. DVB-T2 supports a large number of options that can be chosen to optimize the system. Some of those options (Pilot Patterns, Guard Interval Fraction, Rotated Constellations, FFT sizes) are tested to evaluate their performance. The results are compared with the simulation results available in the implementation guidelines for the extreme cases of Gaussian channel (no echo) and 0 dB echo channel (main path and echo at same level). Index Terms—DTV and broadband multimedia systems, Field trials and test results, Channel modeling and simulation, DVB-T2.
    01/2011;
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    ABSTRACT: Presented are the C/N requirements for DVB-T2 fixed reception. Results have been obtained from field trials carried out to test DVB-T2 performance, considering an outdoor rooftop antenna scenario. Two commercial receivers have been used to obtain C/N threshold values for an image error-free condition. The tested configuration modes are the ones recommended for this scenario: 32K FFT and 64 and 256 QAM constellations. DVB-T has also been measured to obtain direct comparison between both systems.
    Electronics Letters 01/2011; 47(1):57. · 1.04 Impact Factor
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    ABSTRACT: This paper presents a methodology for efficient measurement of digital broadcasting signals, both with field trials or at the laboratory. The study is focused on measuring the C/N requirement for achieving a threshold BER. A comparison between the traditional techniques and the proposed methodology is analyzed in this work. The key of the methodology presented in this paper is the use of general purpose equipment such as a vector signal analyzer for recording baseband IQ samples.
    Instrumentation and Measurement Technology Conference (I2MTC), 2010 IEEE; 06/2010
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    ABSTRACT: This paper presents a study of man-made noise at frequencies below 2 MHz. In this study noise values are obtained from field measurements in different indoor environments in some cities in the north of Spain. The lowest frequencies of the Medium Wave band have been traditionally used for commercial AM transmission and in some countries there is hardly any transmission left. Recently new digital standards, such as DRM and IBOC, have been developed for audio broadcasting in this frequency band. However, there are very few references concerning noise levels in indoor locations at these frequencies. This study is necessary for radio service planning. These results could also complete the data noise values collected by the ITU. This paper also explains the difficulties in the process to obtain accurate results from the measurements, following the recommendations of the ITU and some other reports concerning noise measurements.
    Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on; 05/2010
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    ABSTRACT: A characterization of the potential long distance sky wave interferences between DRM local services in the 26 MHz band is presented in this paper. To do this, a statistical analysis of the ionospheric conditions that cause such electromagnetical impairments has been done in order to contribute to the ITU-R Question 127/6 concerning the use of digital modulation in the 26 MHz band for local coverage. The study is based on two parameters typically used when studying the sky wave propagation: the Maximum Usable Frequency and the field strength received level. Monthly median values of both parameters were predicted by means of two simulation tools referenced by the ITU: REC533 and VOACAP. Also, the corresponding upper deciles were calculated to obtain results more appropriate for planning digital services. Simulations were carried out for every month of the year and hour of the day considering two different transmission antennas and a wide range of SSN values that account for the sunspot number variation in a whole solar cycle.
    Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on; 05/2010
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    ABSTRACT: This paper presents the design of a DVB-T2 modulator algorithm supporting multiple PLP and auxiliary streams. The algorithm works over an asynchronous modulator design, presenting per stream scheduling policies, T2 Frames capacity management, and DFL computation. A software tool was developed in order to create system configurations, validate input parameters, and manage per stream capacity distribution, according to proposed scheduling policies.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2010 IEEE International Symposium on; 04/2010
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    ABSTRACT: This paper presents DVB-T2 laboratory tests carried out for testing mobile reception. The aim of this study is to analyze DVB-T2 technology in order to obtain system assessment on pedestrian and low speed mobile reception. Results provide first approximation about the influence of the new options included in the standard. Furthermore, they can provide noteworthy information for next field trials planned to validate the best parameter set for handheld reception.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2010 IEEE International Symposium on; 04/2010
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    ABSTRACT: This paper presents the first field trials carried out in Spain to test HDTV reception using DVB-T and DVB-T2 systems. High definition and standard definition digital television contents and services were multiplexed and broadcasted from a terrestrial transmitter. The aim of these trials was to analyze DVB-T2 technology when this system is configured according to the needs of terrestrial HDTV broadcasting and to compare the results with DVB-T technology in terms of CNR requirements and achieved data rate. Field measurements were carried out in different scenarios and reception conditions. The study presented in this paper is focused on fixed reception, Gaussian channel, because it is the expected reception condition for HDTV.
    Broadband Multimedia Systems and Broadcasting (BMSB), 2010 IEEE International Symposium on; 04/2010
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    ABSTRACT: This paper presents a study of radio noise levels in the Medium Wave band based on field tests. The planning of the measurement campaign, discussion about the methodology, the process of registered data and results are explained.
    Electromagnetics in Advanced Applications, 2009. ICEAA '09. International Conference on; 10/2009