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ATSC 3.0 includes Layered Division Multiplexing (LDM) in addition to the traditional Time Division Multiplexing (TDM) technique in order to offer simultaneous stationary and mobile services. At the receiver side, Log-likelihood ratio (LLR) probability density functions are considered in the decoding process. The main objective of this paper is to analyze the performance of using different LLR PDF...
This paper presents the performance study of the interleavers defined in the ATSC 3.0 physical layer. It must be noted that for single PLP configurations convolutional time interleaving and frequency interleaving can be used. Nevertheless, when multiple PLP configurations are used, cell interleaving, block time interleaving, frequency interleaving and subslicing can also be included. The ATSC 3.0...
This paper presents a field trials based comparison between different OFDM configuration parameters (FFT and code rates) in order to determine the best choices in a trade-off between capacity and coverage in mobile urban environments. The field trials have been carried out using the Cloud Transmission broadcasting system and the main purpose has been to compare the coverage obtained for each OFDM...
This paper presents the field trials carried out in Bilbao (Spain) for testing the feasibility of Cloud Transmission reception in mobile urban environments. The Cloud Transmission System (Cloud-Txn) is a new way of broadcasting or point to multipoint transmission system, designed for a flexible use of the spectrum, robustness against noise, multipath and capability to provide fixed or mobile reception...
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...
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...
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.
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...
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...
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...
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...
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,...
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...
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.
DRM (digital radio mondiale) is a new digital audio broadcasting system used in narrow band AM bands. In order to analyze its propagation behavior, high quality receivers must be implemented. Thus, BER and C/N ratios may be measured and analyzed, enabling broadcasters to establish the best strategy to effectively cover a wide geographical area. In this paper, we present such a receiver. This receiver...
This paper presents the design of professional receiver for monitoring reception of digital radio mondiale (DRM) transmissions. Monitoring and testing the received quality of broadcasted DRM signals requires customized and precise test receivers that must be remote controlled through PC-based measurement software. This receiver consists on a digital front-end, based on digital signal processors (DSP),...
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