scholarly journals Network Coded Multicast over Multibeam Satellite Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-15 ◽  
Author(s):  
R. Alegre-Godoy ◽  
M. A. Vazquez-Castro
Keyword(s):  
Spatial Diversity ◽  
Cross Layer ◽  
Digital Video Broadcasting ◽  
Satellite Systems ◽  
Video Broadcasting ◽  
2Nd Generation ◽  
Qos Guarantees ◽  
Average System ◽  
Multicast Scheme

We propose a multicast scheme for multibeam satellite systems exploiting both the multiuser and spatial diversity inherent in this type of systems while taking into account realistic physical distributions of User Terminals (UTs) over the coverage. Our proposed scheme makes use of the well-known Adaptive Coding and Modulation (ACM) feature in Digital Video Broadcasting over Satellite, 2nd Generation (DVB-S2) and Extension (DVB-S2X) standards but also incorporates a set of innovative features. First, multilink reception, that is, receivers that can syntonize different frequencies and/or polarizations, together with Network Coding (NC) is used to enable decoding of signals from adjacent beams (spatial diversity). Second, efficient and fair allocation of resources is achieved through Proportionally Fair Multicast (PFM) scheduling. Our results, obtained over realistic nonuniform UTs distributions, show average system multicast throughput gains up to 88% with regard to state-of-the-art multicast schemes. Furthermore, a complete cross-layer architecture is proposed, fully compliant with the standard providing Quality of Service (QoS) guarantees.

Cross-layer packet scheduler for QoS support over Digital Video Broadcasting-Second Generation broadband satellite systems

2012 ◽  
Vol 27 (10) ◽  
pp. 2063-2082 ◽  
Author(s):  
Elizabeth Rendon-Morales ◽  
Jorge Mata-Díaz ◽  
Juanjo Alins ◽  
Jose L. Muñoz ◽  
Oscar Esparza
Keyword(s):  
Digital Video ◽  
Second Generation ◽  
Cross Layer ◽  
Digital Video Broadcasting ◽  
Satellite Systems ◽  
Video Broadcasting ◽  
Packet Scheduler

IPR Policy of the DVB Project

2011 ◽  
pp. 260-383
Author(s):  
Carter Eltzroth
Keyword(s):  
Digital Video ◽  
Digital Video Broadcasting ◽  
Common Rule ◽  
Video Broadcasting ◽  
Technical Work ◽  
Ipr Policy

The DVB Project is a European-based standards forum that for close to 15 years has been developing specifications for digital video broadcasting, many now implemented worldwide. Its IPR policy has several novel elements. These include “negative disclosure,” the obligation of each member to license IPRs essential to DVB specifications unless it gives notice of the unavailability of the IPR. This approach contrasts with the more common rule (e.g., within ANSI accredited bodies) calling for IPR disclosure and confirmation of availability on FR&ND terms. Other notable features of the IPR policy of DVB are arbitration and fostering of patent pooling. This article provides a commentary on the DVB’s IPR policy and on its application. It also describes the work of the DVB in resolving IPR “gateway” issues when the perceived dominance of technology contributors, notably through control over IPRs, risked, in the view of some members, distorting new digital markets. In two cases, DVB has created a licensing mechanism to dispel these concerns. In addition to the quality of its technical work, DVB’s success lies in its novel IPR policy and its ability to achieve consensus to resolve gateway issues.

scholarly journals CNR and BER Ranges for the DVB-T2 Reception-Success

2017 ◽  
Vol 7 (6) ◽  
pp. 3727 ◽  
Author(s):  
Budi Setiyanto ◽  
Risanuri Hidayat ◽  
I Wayan Mustika ◽  
Sunarno Sunarno
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Digital Video ◽  
Second Generation ◽  
Field Measurements ◽  
Real Data ◽  
Digital Video Broadcasting ◽  
Numerical Examples ◽  
Video Broadcasting

DVB-T2 (Digital Video Broadcasting Terrestrial Second Generation) reception requires a sufficient quality of the received signal. <em>CNR</em> (carrier-to-noise ratio) and <em>BER</em> (bit-error-rate) are two of quantities describing the quality. This paper presents the range of each quantity providing a successful reception based on real data obtained by field-measurements. This data was collected from MO (mobile-outdoor) and SI (stationary-indoor) receiving-systems capturing signal sent by some on-air trial transmitters broadcasting services focused on the fixed-receivers. The result indicated that the successful and failed receptions were split into two quite separated (concentrated) ranges of post-decoded <em>BER</em> and therefore a boundary distinguishing them could be prominently defined. In contrast, they were spread in a wide common range of <em>CNR</em> and pre-decoded <em>BER</em>. Furthermore, the boundary that corresponded to this last quantity was ambiguous. In the case of MO reception as numerical examples, the two split ranges of post-decoded <em>BER</em> were less than about 10<sup>-5</sup> and more than about 2.7 × 10<sup>-4</sup> for the successful and failed receptions, respectively, whereas <em>CNR</em> as high as about 14 dB could be viewed as a soft boundary distinguishing these both reception-success conditions.

scholarly journals Picture-Based Multiple-AntennaTechnique for the DVB-T2 Receiver

2017 ◽  
Vol 63 (3) ◽  
pp. 261-267
Author(s):  
Budi Setiyanto ◽  
Risanuri Hidayat ◽  
I Wayan Mustika ◽  
Keyword(s):  
Field Measurement ◽  
Second Generation ◽  
Real Data ◽  
Multiple Antenna ◽  
Digital Video Broadcasting ◽  
The Real ◽  
Video Broadcasting ◽  
Single Antenna ◽  
Time Out

Abstract Deep-fading can decline the quality of the received signal to below threshold, and interrupts the reception-success (generating an outage or time-out). In DVB-T2 (Digital Video Broadcasting Terrestrial Second Generation) receiver, such interruption can be identified from the displayed-picture. Multiple-antenna is one of techniques to mitigate such problem. This paper presents a multiple-antenna method for receiving the DVB-T2 signal. At any time, one of antennas is selected where the selection action is controlled by the recovered-picture. In case of using two antennas, field-measurement was conducted to collect the real data, later used in the simulation of the proposed algorithm. The result showed its capability to increase the portion of cumulative reception-success duration up to approximately 1.53 times with respect to its equivalent single-antenna.

Quantization Algorithms in Healthcare Information Telematics Using Wireless Interactive Services of Digital Video Broadcasting.

2020 ◽  
Vol 13 ◽  
Author(s):  
Konstantinos Kardaras ◽  
George I. Lambrou ◽  
Dimitrios Koutsouris
Keyword(s):  
Data Compression ◽  
Data Transmission ◽  
Digital Video ◽  
Digital Television ◽  
End User ◽  
Digital Video Broadcasting ◽  
New Era ◽  
Video Broadcasting ◽  
Television Network ◽  
Interactive Services

Background: In the new era of wireless communications new challenges emerge including the provision of various services over the digital television network. In particular, such services become more important when referring to the tele-medical applications through terrestrial Digital Video Broadcasting (DVB). Objective: One of the most significant aspects of video broadcasting is the quality and information content of data. Towards that end several algorithms have been proposed for image processing in order to achieve the most convenient data compression. Methods: Given that medical video and data are highly demanding in terms of resources it is imperative to find methods and algorithms that will facilitate medical data transmission with ordinary infrastructure such as DVB. Results: In the present work we have utilized a quantization algorithm for data compression and we have attempted to transform video signal in such a way that would transmit information and data with a minimum loss in quality and succeed a near maximum End-user approval. Conclusions: Such approaches are proven to be of great significance in emergency handling situations, which also include health care and emergency care applications.

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