GNSS platform for wearables and industrial applications


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U-blox unveiled the M10, the latest GNSS (Global Navigation Satellite System) platform entirely designed in-house for low-power positioning applications. U-blox M10 is well suited to a wide range of applications such as sports watches or cargo and livestock trackers, all in a compact form and very long battery life. Skyscrapers border part of the sky. Therefore, the number of satellites within a GNSS receiver’s line of sight, urban canyons, make it extremely difficult for GNSS receivers to lock onto the signals emitted from satellites in orbit long enough to continuously locate them. Increasing the number of satellites could make a big difference. The new M10 u-blox positioning platform can simultaneously obtain data from up to four GNSS sets even in harsh environments such as very tall buildings. Super-S technology in the receiver helps filter out noise and distinguish GPS signals. In an interview with EE Times, Bernd Heidemann, Product Manager at u-blox AG, highlighted how the u-blox M10 was designed to consume 12 megawatts in continuous tracking mode, which is about 5 times less than the parent company’s previous technology (M8). Super-S technology optimizes power consumption and accuracy with weak signals or small antennas. “The short Time First Overhaul (TTFF) ensures low power consumption, and the weak signal compensation feature improves location accuracy,” said Heidtmann. Figure 1: u-blox M10 and u-blox M8 (Source: u-blox) GNSS satellite positioning is an indispensable everyday technology. We depend on him now when we have to go somewhere. Thanks to the reduction in the costs of electronic hardware and software, there has been a significant expansion in terms of applications and use cases. We rely on him constantly – often without even being aware of him. The accuracy challenge is always an important factor, driven by security and developing new business models. The European Union’s Galileo Global Navigation System allows GNSS receivers to ensure that the satellite signals are actually coming from the Galileo satellites and have not been modulated. This approach makes it more difficult for hackers to “do their job”. The European constellation GNSS will be the first to offer free certified navigation messages to civilian users. Galileo is the European Global Navigation Satellite System (GNSS), which has been developed to provide location, navigation and weather information to users around the world. Unlike other GNSS systems, the Galileo system is managed by a civilian body, the European Space Agency (ESA), and has been designed in response to the needs of different user communities. The Galileo satellite segment includes the use of 30 satellites (24 operators and 6 parts), in an orbit at an altitude of more than 23,000 km. The satellites will be evenly distributed among three orbital planes and will take about 14 hours to orbit the Earth. The security policy used consists of appending an encrypted authentication signature to the GNSS navigation messages, which can be used to verify messages based on a symmetric / asymmetric hybrid key policy. GNSS data authentication will play an important role in advanced driver assistance systems, autonomous driving, or any number of risky business activities. u-blox Hardware u-blox M10 is engineered to consume 12MW in continuous tracking mode, making it ideal for battery-powered applications. The increased RF sensitivity in the u-blox M10 reduces the time the platform takes to reach its first steady position on initialization, and works fine even with small antennas. The size of the u-blox M10 chip is 4x4mm in the QFN package. The popular “MAX” modular form factor allows for easy integration without the need for external components. The “ZOE” form factor has the same functions as the MAX and NEO. This is called the system in Package.Haidtmann said it has the same functionality as the maximum unit, but is packed in only 20 square millimeters. Figure 2: The three units, from the left: the QFN package, the MAX unit and the ZOE form factor (source: u-blox) Two tests conducted in Australia and Germany showed that Even in harsh environments where large buildings can block the signal, Super- S and an enhanced “Super-E” mode allow for more power reduction with lower refresh rates, resulting in improved scaling where the signal is extremely low (Fig. 3). S-Two common challenges encountered in industrial tracking and wearable use cases: weak GNSS signals and insufficient antenna positioning, but also factors such as poor weather conditions, obstructed sky views, and urban canyons negatively affect the quality of GNSS signals that reach the receiving site, thus reducing From positioning performance u-blox Super-S b Yen is two different sizes to deal with these situations. GNSS receivers can be in two operational stages: the acquisition stage and the tracking stage. In the first stage, there is higher sensitivity, and the acquisition time is reduced by obtaining a center with higher probability and less energy consumption. In the next stage, the goal is to preserve the position. Figure 3: Maximum site availability with simultaneous reception of 4 GNSS in Australia (source: u-blox) Figure 4: Weak signal compensation in Germany (source: u-blox) “If you look at the image, to the left of Figure 3, you see one And two… In number one, you see that the buildings are not as tall as they are in second place. And if you look to the right, you see all these colored lines spring up, and green is the correct path, really the real position. Then there is M8 in yellow and M10 in blue. And for first place, You see that there is almost no difference. They basically mention the real situation. But if you look at the second number, you will notice the difference. The yellow line is about 20 meters away from the green line. The blue line is about 10 meters away from the green line. And there we see in such a scenario. Where there are really tall buildings in deep urban areas, and there is a difference you have 4 GNSS, ”Heidtmann said. “If you are in this area, you cannot see every satellite because the buildings will give you shade. And if you can hear all four constellations, more satellites will attach. And then, of course, this gives you a benefit, because there is always a selection. , The receiver will look at all available satellites, then choose a maximum of 30 signals to track. But of course, in this case, you don’t have 30, so you’re in luck if you have eight or nine, “Heidtmann said, performing the small antennas or antenna locations The bad is the weak RF signal strength. Weak signal compensation changes the behavior of the receiver for adoption in this situation. “The driving tests showed a 25% improvement in location accuracy and speed,” said Heidtmann. Figure 5: M10 block diagram (Source: u-blox) Fig. 6: u-blox M10 and M8 in comparison (Source: u-blox) u-blox M10 features advanced plagiarism and jamming detection. “Spoofing and obfuscation attacks are detected and reported to the host.” Heidtmann said, “Spoofing detection based on analysis of GNSS raw data, mitigation of the spoofing attack with authenticated flag (Galileo OS-NMA).” Important applications need to know how much confidence they can It puts it in its data obtained by recipients. The protection level describes the maximum position error and estimates the reliability of the system. This level is affected by all sources of error that commonly affect GNSS solutions. Heidtman said: “If the GNSS receiver, for example, specifies its location With a 95% protection level of 1 meter, there is only a 5% chance that the reported site is more than 1 meter from its physical location. ”Innovations in systems and technologies related to the GNSS (Global Navigation Satellite System) sector are a process in constant and rapid development. Allocating the instantaneous accuracy of the Global Positioning System (GPS) at these levels to the US defense, but this led to the race to create more reliable alternative systems that led to the emergence of GNSS (Global Navigation Satellite Systems) with contributions from several countries around the world , Like the Russian GLONASS. The Chinese Albedo and European Galileo. Galileo’s data helps locate lighthouses and rescue people at risk in all kinds of environments. .


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