ABS-S About
ABS-S About
Chinese DTV Standard - ABS-S and the Chinese Government "Cun Cun Tong" Project
ABS-S is specified as the China DTH standard for satellite transmission. It can support various services and applications ranging from digital TV broadcasting and data distribution to interactive services. Benefitting from an advanced channel coding algorithm, high-efficient modulation, and flexible rolloff factor choices, the ABS-S system can achieve very high spectral efficiency and enhance transmission capacity. Compared to DVB-S2, ABS-S systems can achieve comparable or higher C/N ratios, and threshold performance with lower complexity.
ABS-S is the mandated signal transmission technology for China's DTH solution. ABS-S can adapt to a variety of business requirements including digital broadcast television signal and interactive applications. Test results show data transmission capabilities, acceptance thresholds and other indices of ABS-S meet or exceed the international satellite telecommunication technology standard set by DVB-S2, while ABS-S has a simpler structure and receives signals more efficiently. The satellite channel receiver chip AVL1108 developed by Availink, Inc. is specifically designed for ABS-S technology, uses an innovative design breakthrough, supports both QPSK and 8PSK modes and is capable of carrying 15 HDTV programs on one transponder.
According to the requirements of China's No. 11 Five-Year development plan, strengthening film, radio and television coverage in rural areas and vigorously developing the building of radio, film and television "Cun Cun Tong" is one of the most important tasks for SARFT (State Administration of Radio, Film and Television). The Central government has clearly defined that direct satellite broadcasting is the method for covering "Blind Villages". By using the most advanced satellite transmission technology, we can solve the coverage problem, while at the same time providing the application platform for developing HDTV and interactive services for the future. Availink, Inc. participated in the process for setting ABS-S technical specifications and became the honored partner in this national project.
ABS-S
Will the blast-off's inside No.9" satellite, letter way ABS for delivering standard will adopting the our country by oneself develop, having the right of independence knowledge . S.( advanced satellite broadcast system)Why have no an adoption the international top is most popular and lowest DVB " of cost s? it is said that, technique advanced with broadcast the safety is quilt consideration of two big and main dint factor.
Broadcast live the to just and formally shoot this year because of the our country, and shine on the department the inside in the standard not only and late in the DVB " S, and also night is in its grade creep version DVB " S2, if most standard technique that adopt level and DVB. S equal, obviously have no meaning.Say for the DVB- S2, although have the higher to take the utilization, more advanced coding method with near to the system of the fragrant agriculture extreme limit, technique complicacy degree too opposite and higher.Current world ability for there is factory of 4 large slicesing having the production DVB " S2 the slice, and have a house can the large quantity measure to provide goods.Obviously, this disadvantage broadcast the satellite industry to do in the our country independence strong do big. Local ABS " S that adopt slice is on a lot of functions better than DVB- S2.For example, the is low 50% of premise bottom, ABS " S slice the velocity is high to out 50%, support QPSK with 8 PSK mode.Under 8 the PSK mode, offering 45 Msp s sign rate with tallest 120 Mbpses clean code rate, can realize to carry 15 road- delivering of high and pure satellite television program.
ABS " S is in the DVB- S not the permit, therefore current receive the machine can't be normal to watch, and must purchase the wide electricity in China the section attestation factory the appropriation for producing in house to receive the machine to watch.
Satellite that new generation satellite that inside No.9 the satellite shoot its hour, nation to have already organized to develop to have the right of independence knowledge for the sake of the live safe and total bureau to deliver the technique( ABS- S), attain the international and advanced level, deliver the standard with current and offshore satellite not the permit, plus the other technique measure, can insure the safety to broadcast live the business, business enterprise in local and many houses already successful develop outed the abs- sed the satellited to receive the machine, and have already had the ability of the large-scale production.
ABS-S(Advanced Broadcasting System-Satellite)
Will the blast-off's " inside No.9" satellite, letter way ABS for delivering standard will adopting the our country by oneself develop, having the right of independence knowledge . S.( advanced satellite broadcast system)Why have no an adoption the international top is most popular and lowest DVB " of cost s? it is said that, technique advanced with broadcast the safety is quilt consideration of two big and main dint factor.
Broadcast live the to just and formally shoot this year because of the our country, and shine on the department the inside in the standard not only and late in the DVB " S, and also night is in its grade creep version DVB " S2, if most standard technique that adopt level and DVB. S equal, obviously have no meaning.Say for the DVB- S2, although have the higher to take the utilization, more advanced coding method with near to the system of the fragrant agriculture extreme limit, technique complicacy degree too opposite and higher.Current world ability for there is factory of 4 large slicesing having the production DVB " S2 the slice, and have a house can the large quantity measure to provide goods.Obviously, this disadvantage broadcast the satellite industry to do in the our country independence strong do big. Local ABS " S that adopt slice is on a lot of functions better than DVB- S2.For example, the is low 50% of premise bottom, ABS " S slice the velocity is high to out 50%, support QPSK with 8 PSK mode.Under 8 the PSK mode, offering 45 Msp s sign rate with tallest 120 Mbpses clean code rate, can realize to carry 15 road- delivering of high and pure satellite television program.
ABS " S is in the DVB- S not the permit, therefore current receive the machine can't be normal to watch, and must purchase the wide electricity in China the section attestation factory the appropriation for producing in house to receive the machine to watch.
Satellite that new generation satellite that inside No.9 the satellite shoot its hour, nation to have already organized to develop to have the right of independence knowledge for the sake of the live safe and total bureau to deliver the technique( ABS- S), attain the international and advanced level, deliver the standard with current and offshore satellite not the permit, plus the other technique measure, can insure the safety to broadcast live the business, business enterprise in local and many houses already successful develop outed the abs- sed the satellited to receive the machine, and have already had the ability of the large-scale production.
Newtec launches the first professional satellite modulator compliant to China's new direct-to-home standard ABS-S
March 2007
Newtec announces that it is launching the first professional modulator compatible with the ABS-S standard, China's new standard for direct-to-home broadcasting via satellite.
Newtec has developed the new modulator in cooperation with the Chinese Academy of Broadcasting Science and Availink, Inc, who will be providing receiver chips for the set-top-boxes. "We chose to work with Newtec because we see this company as one of the leaders of SATCOM technologies and we have a long history of successful cooperation between our organisations", says Mr. Ma Ju, President of the Academy of Broadcasting Science at SARFT.
The new ABS-S (Advanced Broadcasting System - Satellite) standard is based on an advanced and very efficient modulation technology. Compared to DVB-S, the ABS-S standard can help broadcasters save up to 30% on their satellite bandwidth costs or reduce the size of the antenna necessary to receive the TV signals in the homes.
The new modulator has received the product number NTC/2278 and is part of the Azimuth family, a fully modular product range that also includes leading DVB-S, DVB-DSNG and DVB-S2 products well known for their performance and reliability.
"We are particularly proud to play such a critical role in the development of satellite television in China, which will potentially affect the live of more than a billion people. The Academy of Broadcasting Science and Availink have proven to be partners with an exceptional vision and a focus on both quality and speed of execution. This product launch is an important milestone in Newtec's endeavour to shape the future of satellite communications" says Serge Van Herck, CEO of Newtec.
The Application of LDPC Code in ABS-S System
First, the paper introduces a new generation satellite broadcasting system in China named Advanced Broadcasting System-Satellite (ABS-S) that offers system performance and service versatility suitable for future satellite digital broadcasting.
Meanwhile the new system utilizes fixed frame structure to realize the CCM, VCM and ACM working modes adopted by DVB-S2 system to further simplify the complexity of the implementation. Secondly, this paper points out the shortcomings of LDPC code used in DVB-S2 and detailedly describes the LDPC code used in ABS-S. Then, based on the simulation result, we can say that the performance of LDPC codes used in ABS-S is better than that of DVB-S2 and the complexity is also lower than that of DVB-S2. At last, we put forward a fast method to encode the QC-LDPC code used in ABS-S system.
ChinaSat-9 Propelled Into Orbit
ChinaSat-9 satellite ChinaSat-9 has been launched into orbit " otherwise known as ZhongXing-9 (ZX-9), the satellite was carried aloft by a CZ-3B Chang Zeng-3B (CZ3B-10 launch vehicle from the LC2 launch complex at the XiChang Launch Center. ChinaSat-9 will be operated by China Direct Broadcast Satellite Company, Limited, and the manufacturer is Thales Alenia Space, with the satellite based on the company's Spacebus-4000C2 platform. This satellite is a integral component of China's 1G DBS system. With 22 Ku- (18 36 MHz + four 54 MHz) band transponders, the orbital slot for ChinaSat-9 is at 92.2° E. ChinaSat-9 uses the ABS-S (Advanced Broadcast System-Satellite) technology that offers a 30 percent boost on the bandwidth efficiency of the transponder. The new Chinese satellite has a life expectancy of 15 years and will be able to broadcast to approximately 98 percent of the population of China, to include Hong Kong, Macao, as well as Taiwan. China Direct Broadcast Satellite is also planning to launch their Xinnuo-4 (Sinosat-4) and Xinnuo-6 (Sinosat-6) satellites by the year 2010. As you may recall, a 8.0 magnitude earthquake struck the Sichuan province in China on May 12th"fortunately, the XiChang Satellite Launch Center avoided damage, which allowed the launch to proceed.
Chinasat 9
Chinasat 9, also known as Zhongxing 9 or ZX-9, is a Chinese communications satellite. It was launched from pad 2 at the Xichang Satellite Launch Centre on 9 June 2008, at 12:15 GMT, by a Long March 3B carrier rocket. It is based on the Spacebus 4000C2 satellite bus, and was constructed in France by Thales Alenia Space. It is one of several Chinasat spacecraft in orbit.
It was launched to act as a relay satellite for the 2008 Olympic Games, and will subsequently be used for general communications. It is operated by the China Telecommunications Broadcast Satellite Corporation on behalf of the China Ministry of Post and Telecommunications. Equipped with 22 NATO J-band (IEEE Ku-band) transponders, it will be placed in geosynchronous orbit at a longitude of 92.2° East.
