News - APSTAR https://www.apstar.com Welcome to APSTAR Tue, 14 Feb 2023 07:18:48 +0000 en-US hourly 1 https://wordpress.org/?v=5.6.10 https://www.apstar.com/wp-content/uploads/favicon.ico News - APSTAR https://www.apstar.com 32 32 APSTAR-6E Successfuly Launched https://www.apstar.com/en/news/apstar-6e-successfuly-launched/?utm_source=rss&utm_medium=rss&utm_campaign=apstar-6e-successfuly-launched Fri, 13 Jan 2023 06:17:56 +0000 https://www.apstar.com/?post_type=apstar-news&p=4051 Xichang, China, early morning 13 January 2023, APSTAR-6E satellite was launched at the Xichang Satellite Launch Center. After nearly ten minutes of flight, the satellite and the rocket were separated […]

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Xichang, China, early morning 13 January 2023, APSTAR-6E satellite was launched at the Xichang Satellite Launch Center. After nearly ten minutes of flight, the satellite and the rocket were separated normally. The satellite accurately entered the target orbit and the launch was a complete success.

APSTAR-6E satellite is a geostationary orbit satellite based on the DFH-3E satellite platform. It is purchased and owned by APSTAR Alliance Satcom Limited, an associate of APT Satellite. APT Satellite provides operation and technical support to the APSTAR-6E programme. APSTAR-6E will provide cost-effective high-throughput broadband satellite telecommunication services in the Asia-Pacific region.

As the first bird of the DFH-3E series, APSTAR-6E satellite is also the first all-electric propulsion GEO telecommunication satellite. The satellite adopts a number of advanced technologies including the full automation ability to lift to the geostationary orbit and long-term automatic station-keeping in the orbital slot. It also has the outstanding performance in high load and low cost.

The launch of APSTAR-6E marks a significant milestone of APT Satellite’s satellite programs, it further poises APT Satellite as a leading satellite company in the Asia-Pacific region.

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APT Satellite Launches Teleport Service https://www.apstar.com/en/news/apt-satellite-launches-teleport-service/?utm_source=rss&utm_medium=rss&utm_campaign=apt-satellite-launches-teleport-service Wed, 25 May 2022 06:42:41 +0000 https://www.apstar.com/?post_type=apstar-news&p=3794 APT Satellite is a leading satellite operator in Asia-Pacific. Currently operating APSTAR-5C, APSTAR-6C, APSTAR-7, APSTAR-9, and APSTAR-6D (operated by associated company APSatcom), APT Satellites has a satellite fleet covering Asia […]

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APT Satellite is a leading satellite operator in Asia-Pacific. Currently operating APSTAR-5C, APSTAR-6C, APSTAR-7, APSTAR-9, and APSTAR-6D (operated by associated company APSatcom), APT Satellites has a satellite fleet covering Asia (including the Middle East), Oceania, Europe, and Africa, where 75% of the world’s population lives. APT Satellite provides satellite communication and satellite broadcasting services to telecom customers and TV customers worldwide. APT Satellite also provides vertically-integrated TV broadcasting, satellite broadband, IDC, and OTT services to our customers so that they can enjoy the benefit of “turn-key” solutions.

These “turn-key” solutions heavily rely on localized teleports stations and associated ground facilities. With teleport stations, satellite service providers could use it as a local PoP to get closer to end-users and provide more bespoke services. APT Satellite has satellite communication business in more than 30 countries. Along with the business expansion and the development of high-throughput satellites, APT Satellite’s teleport stations located in other countries have been growing. Now APT Satellite is operating teleports in 11 sites, including HKSAR, Australia, Indonesia, Malaysia, and in China’s Shenzhen, Beijing, Xi’an, Dali, and Kashgar through APSatcom. In these teleports APT Satellite operates dozens of high-tracking-accuracy large C/Ku/Ka-band antennas and fully redundant ground telecom facilities, providing customers with satellite broadband, satellite media, and equipment hosting services.

APT Satellites teleport network is comprehensive, reliable, and flexible. Southeast Asia is famous for its high rainfall rate. In order to overcome the impact of rain attenuation on satellite links, APT Satellite has deployed geographically diversified teleports in Malaysia and Indonesia. Two sets of identical antennas and ground equipment are built in two locations 50 kilometers apart but linked by fiber links, one each is a hot backup for the other. Satellite links can switch between two teleports to ensure that the overall availability of teleports is over 99.9%.

APT Satellite teleport service is very flexible. The teleports host shared and private platforms that enable customers to enter new markets and regions quickly and cost-effectively. Customers can choose to connect to the APSTAR satellites or host their own antennas and platforms in the teleport premises. With the introduction of NGSO satellite constellations in LEO and MEO, APT Satellite can also provide them with teleport hosting services.

We care, share, and grow with our customers. If you have a need, please feel free to contact: sales@apstar.com.

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APT Satellite Joined Global Satellite Operators’ Association https://www.apstar.com/en/news/apt-satellite-joined-global-satellite-operators-association/?utm_source=rss&utm_medium=rss&utm_campaign=apt-satellite-joined-global-satellite-operators-association Mon, 03 Jan 2022 02:15:30 +0000 https://www.apstar.com/?post_type=apstar-news&p=3502 Global Satellite Operators’ Association (GSOA) was founded on January 1, 2022. At its invitation, APT Satellite joined GSOA as a full member. GSOA was formerly an association of satellite operators […]

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Global Satellite Operators’ Association (GSOA) was founded on January 1, 2022. At its invitation, APT Satellite joined GSOA as a full member.

GSOA was formerly an association of satellite operators in Europe, the Middle East, and Africa. In recent years, the satellite industry has become more and more global in terms of service coverages and business scopes. The association decided to expand to a global scale and changed its name to “Global Satellite Operators’ Association”.

Satellite operators joined as full members:

Airbus CIS, Amazon, Amos Spacecom, APT Satellite, Arabsat, Arsat, Avanti, Azercosmos, Echostar-Hughes, HellasSat, Hispasat, Inmarsat, Intelsat, Intersputnik, Lockheed Martin, Nigcomsat, Nilesat, Omnispace, OneWeb, Rascomstar, SES, SSIMonacosat, Star One, Telenor, Telesat, Telespazio, Thuraya, Turksat, Viasat, and Yahsat

Associate members from satellite-related industries include:

Airbus Defence and Space, Arianespace, Astroscale, Mansat, ST Engineering, and Thales Alenia Space

Thanks to its broad membership base, GSOA will give a globally coordinated voice on behalf of the satellite industry to ensure it is well-positioned to create a more interconnected and sustainable world.

At present, GSOA focuses on three agendas:

  • Release 17 of 3GPP standard will issue in 2022, it will include the satellite networks for the first time. GSOA urges members to adopt these new standards to better integrate satellite links with terrestrial 5G/6G networks;
  • ITU workgroups are preparing for the World Radiocommunication Conference (WRC-23). GSOA focuses on 28 GHz re-allocation. Many high-throughput satellites use this frequency. If it is allocated to 5G/6G on the ground, it will have a significant impact on the satellite industry;
  • About the space traffic environment, GSOA focuses on how to control the imminent congestion issue in LEO under the current absence of international regulations. GSOA urges members to design, launch and operate satellites in a responsible manner, minimize the generation of space debris and preserve the space environment for future generations. At the same time, GSOA calls on authorities of various countries to consider whether specific LEO constellations meet safety and responsible standards when reviewing their landing application.

As a leading satellite operator in the Asia-Pacific region, APT Satellite will actively participate in these agendas and introduce perspectives from the Asia-Pacific region so as to ensure the industry’s healthy and sustainable development.

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An Unbalanced Satellite Ku Capacity Market https://www.apstar.com/en/news/an-unbalanced-satellite-ku-capacity-market/?utm_source=rss&utm_medium=rss&utm_campaign=an-unbalanced-satellite-ku-capacity-market Fri, 19 Nov 2021 08:19:18 +0000 https://www.apstar.com/?post_type=apstar-news&p=3474 The satellite Ku transponder market in China is unbalanced. On the one hand, the standard Ku transponders (14/12 GHz band) are in short supply, and their utilization rate is as high as 100%. On the other hand, the transponders in extended Ku-band (13/11 GHz band) are much vacant, with low customer awareness and few users.

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Power PAN, Gan Haili

Abstract: The satellite Ku transponder market in China is unbalanced. On the one hand, the standard Ku transponders (14/12 GHz band) are in short supply, and their utilization rate is as high as 100%. On the other hand, the transponders in extended Ku-band (13/11 GHz band) are much vacant, with low customer awareness and few users. Satellite transponder resources are scarce, and the use is unbalanced in frequency bands, resulting in the waste of satellite spectrum resources. This paper analyzes Ku frequency bands’ history and current situation, and then puts forward some suggestions for improvement.

In our highly interconnected world, satellites have been widely used not only for video contribution/distribution and live broadcasts but also for many data services, such as internet broadband connection, VSAT service, mobile backhaul, maritime and in-flight connection. In recent years, with the growth of satellite communication applications, the market demand for satellite transponders has been ever increasing, and the global usage of satellite transponders will reach almost 9 Tbps by 2029, which is 10 times of the value in 2016 (Figure 1).

Figure 1

The increasing usage of satellites poses a great challenge. The satellite links need to adopt higher data compression and frequency reuse technology to squeeze the last bit out of every Hz in the frequency table. However, the reality is that no matter how much effort is put in to increase efficiency, the frequency resources allocated to satellites uses are limited.

The satellite frequency usually refers to the unplanned frequency bands of fixed satellite service, which are the frequencies for civil satellite communication services. Along with the development of several generations of satellites, the mainstream satellite frequency bands are C, Ku, and Ka-band (Figure 2).

Figure 2

The 4-8GHz band is called the C-band. Since the 1960s, commercial communication satellites have used C-band to provide transcontinental communication services such as international telephone and television broadcasting. The propagation condition of the C-band radio wave is relatively stable and almost immune to rainfall attenuation, which makes it suitable for satellite telecommunication use. However, with the rapid growth of terrestrial mobile networks, 5G mobile phones also began using C-band, and causing interference to satellite signals (Figure 3). Under the coordination of the regulatory authorities and ITU, the extended C-band (3.4-3.6 GHz) initially used for satellite communication use was re-allocated for 5G, and satellites gradually withdrew from using this band.

Figure 3

The satellite communication in Ka-band uses 27.5-31/17.7-21.2 GHz frequency band, or 30/20 GHz band. Ka-band is more common in high-throughput satellite (HTS) applications, and the satellite EIRP can reach 60dBW or higher by using spot beams with multicolor frequency reuse. The wavelength of the Ka-band is close to the diameter of raindrops, consequently, the rainfall attenuation is more severe than that of the Ku-band (Figure 4).

The 12-18GHz band is called Ku-band. Compared with C-band, Ku-band has a higher antenna gain, yet the antenna size is smaller. Furthermore, the RF equipment in Ku-band is much smaller in size and low in cost. Compared with Ka-band, the influence of rainfall attenuation is smaller in Ku-band. Another advantage is that the satellite industry has adopted Ku-band for decades, the existing ground equipment can continue to work in new Ku-band satellite projects. The transition costs are relatively low.

There is no doubt about the importance of the Ku-band for satellite communication. Satellite operators are increasing their investment in Ku-band transponders. Ku-band transponders account for the most significant portion of all satellite transponders, and their number is still growing year by year. Studies show that, within wide beam satellite transponders, the Ku-band ones accounted for 63% in 2017, and they will increase to 68% by 2027, which will be more than twice that of C and Ka transponders combined.

The Ku frequency band used by the 1st generation communication satellites is 14.0-14.5/12.25-12.75 GHz, or 14/12 GHz band. With the development of the satellite industry, the satellite operators have been striving for more frequency resources (Figure 5):

●  In 1983, the first generation of communication satellites began to use Ku-band for telecommunication and television services. At that time, the Ku frequency band was limited to 14.0-14.5 GHz/12. 25-12.75 GHz frequency band (Asia-Pacific region), with only 500MHz bandwidth;

●  500MHz is not enough to meet the requirements of business expansion, after two ITU World Radio Conferences (WRC-1992 and WRC-1995), it is confirmed that the 13.75-14.0 GHz band can be used as the uplink (i.e. emissions from ground stations to satellites) band of satellites. However, the uplink ground station antenna should be no less than 4.5 meters to protect radiolocation and NASA space shuttle space exploration services;

●  The 4.5 meter antenna limit is too strict. In WRC-2003, the satellite industry successfully released this limit to 1.2 meters (applicable to the Asia-Pacific region);

●  The uplink Ku-band is 13.75-14.5 GHz, the total bandwidth is 750MHz, but the downlink segments are 10.95-11.2 GHz, 11.45-11.7 GHz, and 12.2-12.75 GHz, totally 1050MHz. The uplink is 300MHz less than the downlink. In the WRC-2015 conference, several countries in the Asia-Pacific region, including China, Japan, and Australia, successfully got 14.5-14.8 GHz allocated for uplink use in fixed-satellite service.

Figure 5

Thanks to the effort of several generations of satellite spectrum experts, now the uplink and downlink frequency bands in Ku-band are both 1050MHz, which lays a solid foundation for a balanced design of communication satellites and the development of domestic and international satellite communication services as a whole.

However, in the satellite transponder capacity market in China, the actual services are still crowded in the 14.0-14.5 GHz band, the utilization rate in this band is often as high as 100%. For some hot birds, it is very difficult to find even 1MHz. On the contrary, 13.75-14.0 GHz capacities are often vacant with only a few broadcasting customers, who use this band for satellite TV feed-link.

This is a waste of scarce satellite resources. Firstly in the geo-orbit, the number of satellite transponders in the 13.75-14.0 GHz band in the market is very limited, satellite operators put most investment into 14.0-14.5 GHz; Secondly, in the ground, satellite users are unfamiliar with 13.75-14.0 GHz frequency band, they don’t consider this band in satellite link design. The two factors interact with each other, the low user utilization rate in turn urges satellite companies to avoid the 13.75-14.0 GHz band when designing new satellites, thus aggravating the uneven use between these two bands.

For the use of the 13.75-14.0 GHz band, several stakeholders have different considerations:

◆  Fixed Satellite Ground Station

Fixed satellite ground stations have decades of history using satellite telecommunication services, their preferences influence the satellite capacity market to some extent. The BUC (block up-converter, Figure 6) is an important piece of equipment in a satellite ground station, playing a key role in the satellite links. BUC can be generally divided into two categories according to its working bandwidth: Narrowband BUC with a bandwidth of 500 MHz adopts a local oscillator of 13050 MHz, corresponding to L-band 950-1450MHz and RF in Ku-band of 14.0-14.5 GHz; Wideband BUC with a bandwidth of 750 MHz adopts 12800MHz local oscillator, corresponding to L-band 950-1700 MHz and RF in Ku-band of 13.75-14.5 GHz. The two types BUCs are almost the same in cost.

Figure 6 (A 10 years old narrow-band BUC)

At present, most fixed ground stations in China do not support the 13.75-14.0 GHz frequency band. Because these stations are mostly traditional users of satellites, and the use of 13.75-14.0 GHz for the satellite was limited for a long time in history (the uplink antenna requires more than 4.5 meters before 2003), these traditional stations adopted 14.0-14.5 GHz systems, and rarely added 13.75-14.0 GHz. Gradually these stations have formed a habit to purchase narrowband BUC only. Even for new projects, they tend to use 14.0-14.5 GHz considering it has a stock of existing equipment in this band. This is the main reason causing the unbalance in the Ku-band capacity market.

◆  Service Integrators

Service integrators provide system integration service, contracting in between the satellite operators and the satellite link’s end users. Because fixed ground stations use 14-14.5 GHz band extensively, BUC in this frequency band is in short supply. But the wideband BUC in the 13.75-14.5 GHz band has many in stock. Considering wideband BUC have good versatility and sufficient inventory, satellite integrators have gradually started to use wideband BUC in new satellite projects.

◆  Satellite Operators

At present, all satellite operators who are doing business in China have launched satellites that are equipped with 13.75-14.0 GHz Ku-band transponders. The frequency resources in geo-orbit are very valuable for satellite operators. If the extended Ku-band of a specific orbital slot has priority, satellite operators tend to use this frequency as soon as possible:

First of all, according to ITU rules, frequencies that are not brought into use will lose priority and are easily preempted by other satellite operators; Secondly, for the design of multi-beam or high throughput Ku-band satellite, it is necessary to use 13.75-14.0 GHz, otherwise there would be no sufficient capacity in the uplink and consequently less throughput; Third, the geo orbit is very crowded, adjacent satellites can easily interfere with each other. Using non-overlapping frequencies is the best way to avoid interference. Transponders operating in 13.75-14.0 GHz can avoid interference with nearby satellites if their 14.0-14.5 GHz has priority.

Although satellite operators want to use all frequency resources, they often make compromises for the sake of reality. For example, due to the low acceptance of 13.75-14.0 GHz in China’s satellite capacity market, satellite operators will configure more 14.0-14.5 GHz transponders for Ku beams covering China, while 13.75-14.0 GHz will be mainly used for overseas beams or steerable beams (Figure 7).

Figure 7 (APSTAR Ku-band Satellite Beams)

To sum up, given the scarcity of Ku-band resources and the fact that 13.75-14.0 GHz is not widely used in Chinese satellite communication, we suggest:

★  New satellite communication project includes 13.75-14 GHz frequency band

At present, many satellite communication customers in China still think the uplink frequency band in Ku is 14-14.5 GHz, not aware of 13.75-14.0 GHz. There are plenty of equipment and satellite transponder resources supporting this frequency band in the market, and the cost is the same as, if not lower than, that of 14-14.5 GHz. The new satellite communication project only needs to include 13.75-14.0 GHz in the tender document. Without incurring additional costs, it will extend compatibility and possibility for future projects. It is a double-win solution for all parties.

★  Ground station adopts wideband BUC

Several Asia-Pacific countries, including China, have taken the lead in the world and obtained the frequency band of 14.5-14.8 GHz for fixed-satellite service. Satcom equipment manufacturers can respond to this change by including the 14.5-14.8 GHz into the working frequency of their products. Take BUC as an example. The existing BUC with an operating frequency of 13.75-14.5 GHz has a local oscillator frequency of 12800 MHz. If you want to design a wideband BUC of 13.75-14.8 GHz, you can keep using the local oscillator of 12800 MHz, corresponding to the L-band of 950-2000 MHz. Therefore, wideband BUC with 12800MHz local oscillator is more versatile now and in the future. If these extended Ku frequency bands can be fully used, it is bound to alleviate the current market situation.

★  Use a modem that supports 950-1700MHz and above

Due to historical heritage, traditional modems only support 950-1450MHz. In recent years Ka-band satellites get popular, the bandwidth of some Ka satellite transponders has reached more than 1GHz, so modems have begun to support 950-2150MHZ band, there are many choices in the market. We propose to use more wideband modems in the new satellite communication project, as targeted to promote the use of all Ku-band frequencies in the whole 13.75-14.8 GHz range.

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APSTAR Provide Cellular Backhaul Service During Disaster Relief in Henan https://www.apstar.com/en/news/asia-pacific-satellite-provides-communication-support-for-flood-fighting-and-disaster-relief-in-henan-province/?utm_source=rss&utm_medium=rss&utm_campaign=asia-pacific-satellite-provides-communication-support-for-flood-fighting-and-disaster-relief-in-henan-province Thu, 22 Jul 2021 08:59:28 +0000 https://www.apstar.com/?post_type=apstar-news&p=3383 Recently in Henan Province, China, it has experienced severe floods caused by extremely heavy rains, which has attracted a lot of attention from the people in China and overseas. The […]

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Recently in Henan Province, China, it has experienced severe floods caused by extremely heavy rains, which has attracted a lot of attention from the people in China and overseas. The flood caused road blockages, houses taken away, subways and vehicles inundated, resulted in great loss of life and property.

On July 20, the town of Mihe, located at the confluence of two rivers, was inundated by floods that flowed over the river bank, more than 20,000 people were affected and awaiting rescue. The flood destroyed local telecommunication infrastructure and the worst-hit areas became isolated “islands”, completely cut off from the outside world.

At this critical moment, a “Wing-Loong 2H” disaster-response drone flew to Henan to perform disaster observation and telecommunication restoration missions. The drone carries a 4G mobile BTS, which provides mobile phone signals; At the same time, the drone is equipped with a satellite communication terminal that pointing to the satellite, then the connection with the mobile operator’s teleport station is established through the satellite backhaul link.

Immediately folks in Mihe Town received a SMS message from China Mobile:

“Fellows in Mihe Town, communication was interrupted due to heavy rains. The Emergency Management Department urgently dispatched a drone to your town for rescue, which can temporarily activate the mobile phone connection. Limited by the time that the drone can stay in the air, the network recovery time is only five hours. Please report the situation and contact your family as soon as possible. Good luck!”

The satellite resource used in this rescue operation was the Ku-band capacity in the China beam of APSTAR-5C, with high coverage/power performance on the Henan area. During the disaster ’s peak period from July 20-22, APSTAR 5C provided 34 hours of uninterrupted service.

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APT Satellite Renewed Non-Domestic TV Programme License https://www.apstar.com/en/news/apt-satellite-renewed-non-domestic-tv-programme-license/?utm_source=rss&utm_medium=rss&utm_campaign=apt-satellite-renewed-non-domestic-tv-programme-license Fri, 16 Apr 2021 08:49:55 +0000 https://www.apstar.com/?post_type=apstar-news&p=3288 Although operating at a distance of 36,000 kilometers away from the earth, satellites are closely related to our everyday life on earth. If the metaphor of satellite communication services is […]

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Although operating at a distance of 36,000 kilometers away from the earth, satellites are closely related to our everyday life on earth. If the metaphor of satellite communication services is to solve the problem of “no internet access”, then satellite broadcasting is to solve the problem of “no TV.”

Satellite broadcasting service: TV channels use satellite to broadcast their live content. They uplink the TV signal to satellites, then the viewers on ground can downlink the signal immediately, either through a small DTH dish receiving TV directly, or through a CATV system which receives TV signal from satellite through the dishes in CATV headend.

To explain the importance of satellite TV, take mainland China for instance. There are 450 million TV subscribers, of which 130 million subscribers receive satellite TV through the small DTH dish of “huhutong”. Another 200 million subscribers receive satellite TV through CATV. Two combined together represent 73% of the total TV subscribers.

Despite the number has displayed a slight decline impacted by a recent hype of demand from OTT or streaming media, the “real-time program” and “signal stability” features continues to keep satellite TV with an irreplaceable leading position in the market.

Because of these advantages of satellite broadcasting, the media industry has formed a tradition that TV channel must strive to be “satellite TV”. However, the frequency resources on a satellite are limited, especially on those with many popular channels, so-called “hot bird” satellites, are few in number. In addition, it is necessary to purchase two sets of ground equipment (one active and one standby, baseband + RF frequency) for TV channel becoming satellite TV. The whole system is complicated and the upfront investment is large, let alone the follow-up maintenance effort. It is almost mission impossible for ordinary TV channels to implement.

To solve this pain point, helping TV channels get on satellite, APT Satellite came up with a one-stop solution, that utilizes its own teleport facilities, tier-1 internet links, as well as the satellite itself, re-routing the satellite TV signals receiving from the customer through internet, mux with other channels with similar requirement, then transit to the satellite. By doing this, the customers can avoid the trunk investment on hardware equipment, and the associated trivial maintenance works.

APSTAR satellites are hot-birds, boasting many popular TV channels having been on our satellites for over 10 years. They have built up a great deal of receiving communities throughout the world. Joining with APSTAR satellites, even the newest TV channel can enjoy the benefit of reaching these communities immediately, thus maximizing the TV channels’ ratings.

The renewed license mentioned here is the “Non-Domestic Television Programme Service Licence” issued by The Office of the Communications Authority (OFCA). In Hong Kong, as long as the broadcast content is legal and the applicant has sufficient qualifications & eligibilities, OFCA will approve the application for renewal of the service license. APT Satellite uses this license to provide this TV service, then customers don’t need to apply by themselves.

This license renewal ensures APT Satellite continues to provide TV service for customers and it is also the result of APT Satellite’s practice of customer-oriented strategy and continuous innovation effort.

APSTAR TV Service Introduction

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5G interference to satellite caught in video https://www.apstar.com/en/news/5g-interference-to-satellite-caught-in-video/?utm_source=rss&utm_medium=rss&utm_campaign=5g-interference-to-satellite-caught-in-video Fri, 27 Nov 2020 03:42:17 +0000 https://www.apstar.com/?post_type=apstar-news&p=3004 The best graphic demo of the three types of 5G interference, and a comparison of the viability of two types of band-pass filter solutions.   Satellite telecommunication has advantages of […]

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The best graphic demo of the three types of 5G interference, and a comparison of the viability of two types of band-pass filter solutions.

 

Satellite telecommunication has advantages of broad coverage, high efficiency, and high availability, it has been widely used in telecommunication and TV broadcasting. In recent years, along with the cellular 5G deployment, satellite signals are severely interfered by 5G since they are operating in adjacent frequencies.

This is a typical satellite TVRO system, the antenna receives the signal from the satellite, then the receiver (IRD) amplifies the signal, decodes it and send to TV.

We test to receive the 3740V TV channel from APSTAR-7 satellite. Normally the TV and spectrum is clear of any interference.

After a 5G base station is deployed in the nearby facility, the TV reception becomes abnormal. The spectrum analyzer shows a cluster of jumping carriers nearby our target TV signal, it is the 5G carrier who causes the problem.

There are three types of 5G interference. Type 1: Co-frequency interference. The 5G operates in the same frequency as the satellite in the 3.4-3.6GHz band. With over thousands of times of power magnitude, 5G totally overwhelms the satellite in this band. Type 2: Spurious interference. Some 5G equipment emits spurious carriers outside of its working frequency bands, interfering into the satellite in 3.7-4.2GHz band. Type 3: Saturation interference. Although in difference frequency band, the 5G is so powerful that it still manages to drive the LNB amplifiers to saturation point, then satellite TVRO stops working.

To solve the problem, we should stop the 5G signals from entering into the satellite receiving system. 5G operates in 3.4-3.6GHz band, satellite operates in 3.4-4.2GHz band. By installing a band-pass-filter in front of the LNB, we can filter off the 5G signal, only reserves the satellite signals in 3.7-4.2GHz band.

It is important to note that the 5G frequency used by local mobile operators are different in many regions, the model of the band-pass-filter should also vary. These are two typical models, the one in the left is upgraded to eliminate very serious 5G interference, it is suitable for situation where 5G base station is very close-by, or the frequency of the target satellite signal is close to 5G‘s. Its high performance comes with a compromise on its insertion loss, which decreases the satellite link margin by 1.5 dB. The right one is more commonly used in general situations, it performs decently with relatively low costs.

Once caught in 5G interference, satellite users should investigate the nearby 5G base station deployment, and its working frequencies, so as to come up with an appropriate band-pass-filter solution.

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Successful Launch of APSTAR-6D Satellite https://www.apstar.com/en/news/successful-launch-of-apstar-6d-satellite/?utm_source=rss&utm_medium=rss&utm_campaign=successful-launch-of-apstar-6d-satellite Thu, 09 Jul 2020 14:07:33 +0000 https://www.apstar.com/?post_type=apstar-news&p=2688 At 20:11 on the evening of July 9, APSTAR-6D satellite took off on the CZ-3B/E rocket at Xichang Satellite Launch Center. After half hour flight, APSTAR-6D separated from the rocket’s […]

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At 20:11 on the evening of July 9, APSTAR-6D satellite took off on the CZ-3B/E rocket at Xichang Satellite Launch Center. After half hour flight, APSTAR-6D separated from the rocket’s 3rd stage, completed the first deployment of the solar array, and entered into transfer orbit. In the following days, the satellite will conduct multiple orbit raises, solar array second deployment and antenna deployment. After completing the in-orbit test, it will commission service at the orbital slot of 134⁰E.

(photo: Wen bin)

APT Mobile Satcom Limited (“APSAT”) owns and operates APSTAR-6D satellite, which is the first satellite of “Global High-throughput Broadband Satellite Communication System”, as envisaged by APSAT. Based on the DFH-4E platform, APSTAR-6D was manufactured by China Academy of Space Technology. The satellite has totally 90 Ku-band service spot-beams with single beam capacity of more than 1Gbps, and total capacity of 50Gbps. APSTAR-6D satellite is capable of providing hundreds of Mbps broadband services for airlines, or thousands of Mbps broadband services for maritime ships and cruise ships, so that it can meet all types of mobile satellite communication, as well as satellite broadband connection needs in the Asia-Pacific region.

APT Satellite, as the co-founder of APSAT incorporated in Shenzhen, has been involved in orbital spectrum resources, payload design, manufacture supervision, and overseas gateways construction works for APSTAR-6D.

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APT Satellite Fights NCP Epidemic https://www.apstar.com/en/news/aptfightsncp-2/?utm_source=rss&utm_medium=rss&utm_campaign=aptfightsncp-2 Wed, 12 Feb 2020 02:56:54 +0000 https://www.apstar.com/?post_type=apstar-news&p=2535 The recent epidemic of NCP (Novel Coronavirus Pneumonia, or Covid-19) has developed rapidly, as a leading satellite company in the Asia-Pacific region, APT Satellite will spare no effort to continue […]

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The recent epidemic of NCP (Novel Coronavirus Pneumonia, or Covid-19) has developed rapidly, as a leading satellite company in the Asia-Pacific region, APT Satellite will spare no effort to continue providing telecommunication and broadcasting services to our customers located in the Asia-Pacific region, the Middle East, Africa and Europe.

APT Satellite has adopted the following measures:

  • Following Hong Kong government regulations, staff newly returned from mainland China should implement 14-day compulsory home isolation, and work remotely from home
  • Introduce flexible work and home office policies
  • All employees must measure body temperature and wear masks during office hours, suspend lunch provision
  • Company security guards probe visitors’ temperature, register identities, and inform visitors that they must wear masks throughout
  • The company prepares masks and sanitizers for staff
  • The company installs a hand-washing table, hand sanitizer and paper towels at the entrance of the security kiosk. You must wash your hands before entering the company.
  • Clean the elevators, door handles, keyboards, desktops and toilets every day.
  • Use home office software to conduct meetings, and ensure seamless office work coordination
  • Employees shall report their health status every day to the company

Together we will overcome the difficulties! APT Satellite will stand firm with China, with Wuhan, and with all our customers!

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APT Satellite Participates Connectech Asia 2019 https://www.apstar.com/en/news/apt-satellite-participates-connectech-asia-2019/?utm_source=rss&utm_medium=rss&utm_campaign=apt-satellite-participates-connectech-asia-2019 Thu, 20 Jun 2019 09:17:45 +0000 https://www.apstar.com/?post_type=apstar-news&p=2338 On June 18-20 2019, Connectech Asia 2019 was held at the Marina Bay Sands Exhibition Centre in Singapore. APT Satellite and its subsidiary, APSATCOM, showcased their latest mobile satellite communication […]

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On June 18-20 2019, Connectech Asia 2019 was held at the Marina Bay Sands Exhibition Centre in Singapore. APT Satellite and its subsidiary, APSATCOM, showcased their latest mobile satellite communication project, namely APSTAR-6D, and related services to customers and visitors.

Singapore is an important country along the “Belt and Road” and a media and telecom center in Asia. For many years, Connectech Asia (previously called CommunicAsia) has been regarded as a platform to connect Asia and the global market. This year, it attracted many companies to participate, bringing together world-class telecom operators and service providers to showcase cutting-edge technologies and innovative products in the field of telecommunications, media and broadcasting industries.

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