Digital Video Broadcasting Via Satellite Research Articles

Extensive analysis and evaluation of the DVB S2X superframe for multi-state land mobile satellite channel

The key enabling technology for satellite communication is the digital video broadcasting via satellite (DVB-S) standards. It featured high modulation and coding (MODCOD) schemes for reliable high quality communication link. Its operation under the clear line of sight condition has been outstanding. However, in situation where the user terminal is mobile, additional propagation challenges are introduced which further exhaust system resources and increase system design complexity. The extension of its second generation is the DVB-S2X, which offers additional functionality such as very narrow filtering roll-off factor and the superframe structure, suitable for operation at even very low signal-to-noise ratio (SNR). In this paper, a novel multi-state land mobile satellite (LMS) channel was modelled, leading to three different channel conditions – lightly-shadowed, shadowed and heavily-shadowed. Using these channels, the new system's performance is extensively analysed to determine the gains it offer to mobile channels. As a novel approach, the number of bundled Physical Layer (PL) frames contained in the superframe was made variable, and the results show that increasing the number of PL frames per superframe further improves system performance depending on the channel condition and MODCOD. For instance, for a lightly shadowed channel, superframe implementation for the 64-APSK (7/9) presents a 1 dB gain for 9 bundled PL frames and increasing the number of bundled PL frames to 12 offered an additional 0.7 dB gain. Thus, adaptive MODCOD may be combined with a variable-frame superframe implementation to improve the performance of a mobile satellite communication system and achieve a more efficient trade-off between power and spectral efficiencies than is possible with adaptive MODCOD alone.

Analisis Pengaruh Warna Reflektor Antena Parabola Jenis Solid dan Mesh TerhadapKualitas Sinyal pada Aplikasi DVB-S

Digital Video Broadcasting via Satellite (DVB-S) is a communications that use a satellites as a repeater signal from the sender to the receiver. Because it uses the satellite as a repeater signal , then in the sender and receiver use a parabolic antenna type. The majority of the current parabolic antenna reflector color comes from the color of the material used reflector itself is gray, while the use of other types of color are rarely used be it a lighten color or darken color, in addition to use of the parabolic reflector antenna at this point, especially for the type of solid is very susceptible to corrosion or rust. So it is necessary to research on the influence of color on quality parabolic reflector antenna signal that produce either from a parabolic type of solid or mesh type.This type of experimental research, in this researchers informant trying to observe and manipulated object under control. Informant painting on the parabolic reflector antenna, measuring signal quality, signal strength and the value of C/N and then compare the results of measurements on each color parabolic reflector antenna. Instruments used by informant is a parabolic antenna, Low Noise Block (LNB)and satellite meter.The results showed that the color of a parabolic reflector antenna isinfluence on signal quality and strength of the signal that received by the receiver. The more bright colors that used in parabolic reflector antenna, more electromagnetic waves are reflected toward the LNB satellite dish antenna and vice versa which have an impact on increasing the quality of the received signal at the receiver. Painting parabolic reflector antenna other than as an attempt to prevent corrosion are also could to improve the quality of the signal, with a record of using colors that have been suggested. Color parabolic reflector antennas are recommended for applications DVB - S is a white and light blue

Composite Broadcasting and Ranging via a Satellite Dual-Frequency MPPSK System

Since digital video broadcasting via satellite (DVB-S) signals are “inefficient”, regarding the amount of information they convey on the bandwidth they occupy, a joint broadcasting and ranging system would constitute a unique platform for future digital video broadcasting satellite services effecting the essential tasks of satellite navigation system and direct to home (DTH) services, in terms of both spectrum efficiency and cost effectiveness. In this paper, the design of dual frequency M-ary position phase shift keying (MPPSK) system which is suitable for, respectively, performing both data transmission and range measurement is proposed. The approach is based on MPPSK modulation waveforms utilized in digital video broadcasting. In particular, requirements that allow for employing such signals for range measurements with high accuracy and high range are investigated. Also, the relationship between the frequency difference of dual frequency MPPSK system and range accuracy is discussed. Moreover, the selection of MPPSK modulation parameter for data rate and ranging is considered. In addition to theoretical considerations, the paper presents system simulations and measurement results of new systems, demonstrating the high spectral utilization of integrated broadcasting and ranging applications.

GaInP/GaAs HBT wideband transformer Gilbert downconverter with low voltage supply

A low-voltage wideband downconverter along with an integrated transformer RF balun using the 2 µm GaInP/GaAs HBT technology is demonstrated. This transformer is a symmetric type and plays a role as a single-to-differential balun. Without the parasitic between the transformer and the substrate, the transformer can work at higher frequencies. This transformer downconverter operates from 1.5 to 14 GHz with around 20 dB conversion gain and 1.8 GHz IF 3 dB bandwidth. The frequency range of the mixing operation is wide and covers the digital video broadcasting via satellite (DVB-S) bands. This mixer is therefore useful for DVB-S applications.

Fusion of digital television, broadband Internet and mobile communications—Part II: Future service scenarios

AbstractThis is the second part of the tutorial paper following the previous tutorial paper describing enabling technologies in digital video broadcasting (DVB) system. The paper presents the current and future operational scenarios for DVB via satellite (DVB‐S) system. Review of the current state‐of‐the‐art technologies consisting of integration of broadband Internet and mobile communications and integration of broadband Internet and DVB are given. The future operational scenarios emphasize the fusion of DVB systems with other technologies in terms of network fusion and terminal fusion. For satellite service scenarios, it also takes into consideration mobility management and standard quality‐of‐service mechanism issues, such as integrated services and differentiated services. Several research directions for providing seamless services regardless of network, access technology and terminal in the fusion network are also highlighted in this paper. Copyright © 2007 John Wiley & Sons, Ltd.

A 12-GHz silicon bipolar dual-conversion receiver for digital satellite applications

A 12-GHz monolithic silicon bipolar receiver for digital video broadcasting via satellite (DVB-S) is presented. The receiver is based on a dual-conversion superheterodyne architecture that employs a single LO integrated in the same die. To comply with the stringent LO phase noise requirement of -101 dBc/Hz at 100 kHz offset from the carrier, an innovative VCO topology, based on a three-layer monolithic transformer, was used. The VCO exhibits a phase noise of -102 dBc/Hz at 100 kHz offset from a 5.3-GHz carrier and a 1.1-GHz tuning range. At 12 GHz, the conversion gain is 33.6 dB, the single-sideband noise figure is 5.9 dB and the output IP3 is +16 dBm. This work reports the first 12-GHz DVB-S monolithic receiver integrated in a low-cost silicon bipolar technology.

A monolithic 12-GHz heterodyne receiver for DVB-S applications in silicon bipolar technology

A monolithic heterodyne receiver for digital video broadcasting via-satellite (DVB-S) applications is presented. The integrated circuit consists of a down-converter block and a phase-locked-loop-based local-oscillator synthesizer to translate the DVB-S RF-band (10.7-12.75 GHz) to an IF ranging in the L-band (0.95-2.15 GHz). The receiver exhibits a conversion gain of 38 dB, a single-sideband noise figure of 7 dB, and an output 1-dB compression point of +5 dBm. A 2.2-GHz-wide voltage-controlled oscillator (VCO) tuning range, extending from 8.6 to 10.8 GHz, is achieved adopting a transformer-based topology. The VCO phase noise is as low as -95 dBc/Hz at 100-kHz offset from a 10.6-GHz carrier. The integrated receiver draws 160 mA from a 3.3-V supply voltage. This paper demonstrates the feasibility of a Ku-band DVB-S heterodyne receiver integrated in low-cost 46-GHz-f/sub T/ silicon bipolar technology.

A Ku-band monolithic receiver for DVB-S applications

Despite the incessant progress observed in fixed and wireless terrestrial communication networks, satellite systems remain an appealing solution for broadcasting, point-to-point, and multicasting telecommunications, because of undemanding customer equipment and wide coverage capability. In this scenario, digital video broadcasting via satellite (DVB-S) is recognized as one of the main market-attractive telecommunication fields. Up to now, expensive discrete GaAs HEMT or FET devices have been used to build up circuitry for satellite applications at Ku-band. This article presents the first 12-GHz monolithic receiver for DVB-S applications, implemented in a low-cost silicon bipolar technology. The receiver is based on a superheterodyne architecture, employing a fully integrated LO. To comply with the severe LO phase noise requirement of -101 dBc/Hz at a 100 kHz offset from the carrier, an innovative VCO topology was used implementing a three-metal-layer integrated transformer. The performance parameters of the integrated receiver fulfill DVB-S standard specifications.