CSR's next-generation SiRF positioning products respond to more precise positioning needs
Today, with the rapid development of the city, facing the increasingly complex road environment, multi-level overpasses, parallel main and auxiliary roads, and many forks have made it difficult for the owners of the city to share things, plus the city’s high-rise buildings and glass walls. Numerous, in the case of such a signal transmission environment is extremely demanding, the performance requirements of consumer navigation products are also getting higher and higher, and it has been unable to tolerate navigation products with excessive errors, no satellites or slow search stars.
In this context, CSR has introduced a new generation of positioning chips SiRFstar 4e B03 and SiRFstar 5e B02. According to Dave Borison, senior director of CSR's Positioning Products Division, SiRFstar 4e B03 has higher performance, lower power consumption and smaller size. The SiRFstar 4e B03 has a signal acquisition sensitivity of -160dBm and a tracking sensitivity of -163dBm; its InstantFix extended ephemeris (SGEE, CGEE); and active cancellation of interference through the chip's internal DSP architecture. In terms of power consumption, SiRFaware Hot-Start: 1s TTFF, power consumption is less than 1mW; function in TricklePowerTM mode is 8mW/1Hz. Measuring only 3.5mm x 3.2mm x 0.6mm, it is available in a 42-WLCSP package with a 0.5mm ball pitch.
The biggest difference between the newer SiRFstar 5e B02 and the SiRFstar 4e B03 is its compatibility. It can support both GPS in the US, Glonass in Russia, Galileo in Europe, and Beidou satellite navigation system in China. The SiRFstar 5e B02 can be used for asset tracking and wearable device applications, and now the low-power device is now fully operational, not only reducing power consumption significantly, but also without affecting positioning accuracy. In addition, the SiRFstar 5e B02 is equipped with CSR's new SmartGNSS technology, which provides two modes to minimize power consumption and to manage GNSS system applications based on signal conditions and satellite availability.
According to Dave Borison, CSR's next-generation positioning chip can meet the needs of emerging markets such as wearables and drones with its excellent performance and low power consumption. The target market for SiRF positioning products is mainly focused on the automotive market. Wearable devices, asset tracking and indoor applications. According to Mr. Zheng Yuange, vice president of sales of CSR Greater China, in the automotive market, CSR has a very high market share in high-end vehicles, due to the high requirements of the high-end car's front-loading market, especially the requirement for customization and differentiation. Design capabilities, so CSR's positioning and navigation solutions are used by many well-known manufacturers with strong performance advantages, such as Ferrari, Cadillac, BMW, Audi and many other world-renowned car companies.
In emerging market segments such as drones and wearables, CSR has also made major breakthroughs. Some of the world's leading manufacturers of products have used CSR positioning technology, such as Nike and Microsoft's smart bracelet, Google smart glasses and so on. Dave Borison said that he is very optimistic about such emerging markets. By 2020, the discrete GPS/GNSS chips of wearable devices will grow at a compound annual growth rate of 51%. This is the analysis data of some authoritative research institutions, indicating that these markets are expanding. space.
Dave Borison, Senior Director, Positioning Products Division, CSR
More precise positioning technology
As everyone knows, the decisive factor for navigation products is the accuracy of positioning. CSR positioning technology solutions have been dedicated to helping the consumer electronics market to break away from traditional navigation technologies and achieve true location awareness. CSR complete positioning technology solutions can be directly ported to mobile phones, laptops, netbooks, and music players that consumers use every day. In the portable entertainment system and car navigation system, and with very accurate positioning performance, it has received a lot of praise in terms of innovation and execution.
Dave Borison said that CSR positioning accuracy can reach 3--5 meters, and the highly accurate positioning function can meet the functional requirements of indoor navigation. It can provide users with a clear understanding of the surrounding environment, their own and their loved ones, and help them navigate to the purpose. In the cloud, you can also update related data to ensure the accuracy of the map. And the SiRFstarV architecture is also compatible with collecting real-time information from multiple technologies rather than relying solely on satellites such as GPS, Galileo, GLONASS and Beidou satellites; and a variety of RF signals such as Wi-Fi and cellular networks. A simple message can be obtained through WiFi signal strength and cell phone signal strength, plus a variety of MEMS sensors, such as accelerometers, gyroscope feedback information, and then integrated into the positioning system, so that accurate indoor positioning can be achieved.
Familiar geographical location is one of the important foundations of human behavior. As long as the indoor location can be successfully combined with user data or information of interest to the user, indoor positioning must have a very broad application prospect. Especially in the current O2O trend, if you can combine indoor location, users and related services, indoor positioning will become one of the most important entrances in the era of mobile internet.
Nowadays, there are many high-rise buildings and glass curtain walls in the city. This will cause the transmission of signals to be reflected and interfered by the glass curtain wall. How to grasp the most realistic positioning information in these complicated signal environments is difficult. Therefore, the current navigation devices urgently need to be upgraded. Measurement accuracy in the application environment. CSR further improves the industry-leading track-push algorithm technology, enabling CSR navigators to provide superior sensitivity and enhanced signal reception and position tracking performance in extremely demanding areas such as urban canyons. In this regard, Mr. Zheng Yuanji also shared a case study of a typical city in Seattle, USA, which fully demonstrated the superior performance of CSR navigation technology.
Regarding the question of too much power consumption, Mr. Zheng Yuanji said that the behavior mode and sleep mode of CRS products can be solved very well. The first is to reduce the power consumption by making the system enter different power-saving modes. When not in use or not operating, it will enter sleep mode, and the CSR will have a small current during sleep. In addition, you can save the ephemeris data and go to sleep. If you see the ephemeris, the system will take about 40 seconds to update the ephemeris, recalculate the ephemeris, and then enter the sleep mode instead of calculating the ephemeris. Can reduce power consumption very well. Moreover, the SmartGNSS power mode of the SiRFstar 5e B02 can be intelligently set according to signal conditions and satellite availability, and the position information can be calculated by the algorithm in the shortest time, which can help the product to greatly reduce power consumption.
Technological innovation is the foundation of CSR's successful market position. In the Internet of Things era, the potential applications and advantages of positioning end users have just emerged. The combination of CSR's leading positioning technology and connectivity solutions will further promote these exciting new opportunities.
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