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Layered Division Multiplexing (LDM) is as a new technical solution for multiplexing different services over the same RF channel. it has already been accepted as a baseline technology for the new generation ATSC 3.0 digital terrestrial television (DTT) standard. In the recent literature there are several comprehensive studies that analyze its performance results and main implementation issues. Nevertheless,...
Uniform quadrature amplitude modulation (QAM) has been widely used in terrestrial broadcasting systems because it provides a high data rate although it is less resilient to noise and interference. However, the uniform pattern of the constellation points doesn't provide the highest BICM capacity so a degree of non uniformity is needed so as to improve the BICM capacity of the system. On the other hand,...
LDM is a new multiplexing technique, which grew out the Cloud-Txn concept for offering simultaneously stationary and mobile services. The main objective of this paper is to extend the comparison of LDM and TDM, testing their performance for different use cases, which are targeted as top-priority for the next generation broadcasting systems. The paper will also explore the limits of injection levels,...
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 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...
In this paper, we propose a novel method to validate channel estimations based on two different analysis that compare the similarity between the real signal measurements and the values obtained after processing the theoretical transmitted signal through the estimated channel. The merit of this technique is its simplicity, its flexibility and the possibility to identificate with one parameter the quality...
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