Using on-channel repeater to improve reception in dtv broadcasting service area

Salehian, Khalil; Caron, Bernard; Guillet, M.

doi:10.1109/tbc.2003.817083

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…As a consequence, the delicate task of planning the service coverage for a given geographical area is largely simplified with respect to more traditional multi frequency network (MFN). In fact, the frequency distribution on the territory is no longer a critical issue and also on channel repeaters (OCRs) can be easily introduced as gap-fillers to extend or enhance the coverage [3], [4], [5], [6]. Because of the orthogonal frequency division multiplexing (OFDM) modulation adopted by the standard, these devices must be characterized by very low processing delays and hence direct relay schemes are to be preferred to more complex regenerative solutions.…”

Section: Introductionmentioning

confidence: 99%

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Chiurco

Mazzotti

Zabini

et al. 2012

IEEE Trans. on Broadcast.

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In this paper, we address the main design issues and performance characteristics of an echo canceller for digital DVB-T/H on-channel repeaters (OCRs). The low-complexity channel cancellation technique here described is based on the introduction of a negative feedback loop capable to counterbalance the coupling effects between the OCR antennas (echoes). In the initial phase, locally generated pulse trains are transmitted to estimate the coupling channel between the transmitting and the receiving antennas. This first echo estimation is used to set-up the cancelling unit, whose purpose is to generate a properly filtered replica of the repeated DVB-T/H signal compensating the echoes. After the initial set-up of the system, efficient tracking of the echoes can be performed through traditional least mean square (LMS) techniques. After developing a proper theoretical model, we introduce and discuss some important performance figures such as mean rejection ratio (MRR) and echo suppression at nominal position (ESNP). Then, a detailed description of our implementation of the echo canceller on a field programmable gate array (FPGA) board is reported. Finally, the performance of our prototype are evaluated and the measurement results are compared with those derived by our analytical model.

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Section: Introductionmentioning

confidence: 99%

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Chiurco

Mazzotti

Zabini

et al. 2012

IEEE Trans. on Broadcast.

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“…The ATSC defines the transmitter synchronization methods needed for using SFN infrastructure with ATSC 1.0 [15] and recommends implementation aspects focusing on situations with two-transmitter SFNs [13]. In addition, there are several studies that have investigated the feasibility of ATSC 1.0 SFNs [11,12,14,[16][17][18][19] and others that have proposed improvements in enabling technologies for SFNs, mostly on those related to on-channel interference treatment [20][21][22][23][24][25]. Nevertheless, this paper makes clear contributions to the topic.…”

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confidence: 99%

“…Second, the study considers not only the "artificial" multipath generated by the SFN, but also the "natural" multipath caused by the environment of the propagation channel, in contrast to several studies [16][17][18][19][20]22,25,28] that use the simplified multipath of a single echo signal. It has been shown that environmental multipath, which is associated with a single-transmitter channel, affects the receiver's performance, mainly under indoor reception conditions [29,30].…”

mentioning

confidence: 99%

Design parameter analysis for ATSC 1.0 single frequency networks based on receiver multipath handling performance

Hernández-Flores

Galeano-Torres²,

García-Castillo³

et al. 2021

ETRI Journal

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This work proposes suitable network configurations for single frequency networks (SFNs) with ATSC 1.0 based on network coverage calculations and the laboratory multipath handling performance of commercial receivers. SFNs are widely used for delivering terrestrial digital television services because of their efficient use of the spectrum. In Mexico the analogue television transmissions switch‐off occurred on 31 December 2016. Thus it is expected the adopted ATSC 1.0 system will be in force for the next several years despite the recent standardization of the ATSC 3.0 system. As ATSC 1.0 uses 8‐VSB modulation the multipath handling capability of receivers is critical for the design of SFNs. The presented network planning results help develop technical normativity for implementing SFNs in Mexico and other countries that use ATSC 1.0. SFNs with transmitter separation up to 130 km are fully covered for outdoor reception mainly due to the directivity of the receiving antenna. Moreover for indoor reception at least 70% of an SFN coverage area can be achieved with a transmitter separation of up to 60 km depending on the radiated power and the transmitter antenna height.

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“…Gap-fillers are feedback systems in which part of the transmitted signal is induced back to the input due to the coupling path between transmitting and receiving antennas [126], [127]. As a consequence, the transmitted signal consists on several echoes, each one delayed and attenuated from the previous one, with risk of instability and system oscillation, see Figure 4.2.…”

Section: Use Of Gap-fillers In Dvb-h Networkmentioning

confidence: 99%

Cost Efficient Provisioning of Mass Mobile Multimedia Services in Hybrid Cellular and Broadcasting Systems

Barquero¹

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One of the challenges that the wireless industry faces today is to provide mass multimedia services to mobile and portable devices at low cost, making them affordable to users and profitable to operators. The most representative service is mobile TV, which is expected to become a key application in future wireless networks. Nowadays cellular networks cannot support large scale consumption of such services, and newly deployed mobile broadcasting networks are very expensive to deploy due to the large investment in infrastructure required to provide acceptable coverage levels.This dissertation addresses the problem of providing a cost efficient provisioning of mass mobile multimedia services with existing wireless infrastructure for digital broadcasting and cellular systems. State-of-the-art mobile broadcasting (DVB-H) and cellular (evolved 3G+ networks with HSDPA and MBMS) commercial technologies have been considered. Our approach is DVB-H centric. The main paradigm proposed to provide lower cost services is to avoid deployment a DVB-H network with high capacity and full area coverage from the beginning. Instead, it is proposed to perform an incremental DVB-H network deployment that follows the user demand. Within this context, the cellular network is essential to avoid over-dimensioning the broadcast capacity, and also in low populated areas until the deployment of a DVB-H transmitter or gap-filler becomes convenient.The main technical solution proposed in this dissertation is to perform a multi-burst protection of the transmission in DVB-H using Raptor coding. The idea behind is to exploit the time diversity of the mobile channel to improve the robustness of the transmission, and thus the coverage level, at the expense of an increased network latency. Contrarily to most technical enhancements proposed in the literature, the introduction of this technique would be backwards-compatible with existing networks and terminals, since it could be introduced as a software update either at the link or the application layer.On the other hand, this dissertation also investigates the potential efficiency improvement that can be achieved in a hybrid DVB-H/3G+ system when the cellular network is used to repair errors of the broadcast DVB-H transmissions. Raptor coding is also considered in this case, but at the application layer; since it enables an easy and efficient implementation of the repair mechanisms in such hybrid systems.iii iv ABSTRACT In the dissertation we evaluate the potential gain that can be obtained with multi-burst forward error correction (FEC) in DVB-H compared to the conventional intra-burst FEC mechanism by means of simulations, lab and field measurements, and theoretical studies. Our results show that it is feasible to significantly increase the area coverage and the service quality in already deployed networks, as well as to reduce the investment in infrastructure required to deploy new networks. The gain is especially important for services where a large latency is not an issue, such as file do...

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Using on-channel repeater to improve reception in dtv broadcasting service area

Cited by 10 publications

References 1 publication

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

FPGA Design and Performance Evaluation of a Pulse-Based Echo Canceller for DVB-T/H

Design parameter analysis for ATSC 1.0 single frequency networks based on receiver multipath handling performance

Cost Efficient Provisioning of Mass Mobile Multimedia Services in Hybrid Cellular and Broadcasting Systems

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