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Positioning Allowed? The New Algorithm Can Improve The Accuracy Of GPS To Centimeter
Apr 05, 2016

     Recently, researchers at the University of California brought a GPS (Global Position System, Global Positioning System) data processing mode, in positioning accuracy centimeter premise of low-power processors Hold live data processing needs. Breakthrough may be used in other areas of the autopilot require high-precision technology, compared with other centimeter-level GPS algorithm wins in ease of data processing.

     The results of this new technology is several equations for determining the position of the GPS receiver. Ensuring centimeter accuracy and real-time applications, while only a small amount of calculation, without increasing the complexity of data processing. In product applications, not only for professional navigation system, but also in the field of commercial self-driving cars. Currently mobile phones and wearable devices such consumer digital products, without changing the hardware configuration, you only need to upgrade the software, you can spend centimeter accurate positioning data, without a significant product price increases.

     The study by the University of California, Jay Farrell led, he is electrical and computer engineering professor and chairman of the California Burns School of Engineering, the IEEE traffic control system technology area published papers related to this technology. Currently, two members of team management research project has been worked in Qualcomm and Google.

     GPS positioning this concept first appeared in the early 1960s, it is a space-based navigation system that allows a recipient computing device has its own position and speed. The main principle is to estimate the time of receipt of the head four or more satellite radio signals, to determine their own position. Since the defense deliberately introducing errors and other reasons, the civilian-grade GPS positioning accuracy is about 20 meters.

     Currently, to further strengthen the positioning accuracy, the birth of DGPS (Differential Global Positioning System, Differential Global Positioning System). Simply put, at a known position has been accurately measured with a GPS receiver as a fixed reference point on the ground, between the reference point and positioning equipment to increase the use of radio-step position correction, etc., it can be up to 1 meter accuracy .

     Nevertheless, the meter-level accuracy is not enough to support the existing autonomous vehicles. In order to meet the self-driving cars automation and security you need to know to ensure the accuracy of the vehicle in which lane. And the vehicle traveling at a high speed, it is necessary to provide the entire process of moving enough to the point where the sample collected and maintained high bandwidth communications, in order to achieve immediate availability of high-precision positioning capabilities. This, undoubtedly, precise positioning more difficult.

     Existing technologies to achieve centimeter-level accuracy, the data needs GPS navigation systems and equipment for measuring internal inertial measurement unit (such as car gyro) get together. It provides high-precision positioning data from the GPS, inertial measurement unit for high sample rate acquisition and sustained high-bandwidth communications. However, this method is very expensive operation, limit application of this technology in the real world.