Fast ranging method in cooperative positioning

Fast Positioning Using the Lambda-method

Ambiguity resolution is essential for precise GPS diffe rential positioning. At the IAG General Meeting in Beijing 1993 [1], a new method for fast integer ambiguity estimation has been introduced. Some aspects of the theory have been reviewed at the DSNS 94 conference [2]. The LAMBDA-method, which stands for Least-squares AMBiguity Decorrelation Adj ustment, first decorrelates the ambiguities a...

Receiver Biases in Global Positioning Satellite Ranging

Survey on Ranging Sensors and Cooperative Techniques for Relative Positioning of Vehicles

Future driver assistance systems will rely on accurate, reliable and continuous knowledge on the position of other road participants, including pedestrians, bicycles and other vehicles. The usual approach to tackle this requirement is to use on-board ranging sensors inside the vehicle. Radar, laser scanners or vision-based systems are able to detect objects in their line-of-sight. In contrast t...

Characterizing Cooperative Positioning in VANET

Cooperative positioning (CP), a localization means that has been widely used in wireless sensor networks, is emerging as one of the promising solutions for improving the vehicular positioning in VANET. CP allows each individual node in the network to calibrate its own position, by leveraging distance measurements between neighbor nodes with unknown or estimated (e.g., from GPS) positions. While...

Study on Cooperative Positioning System

Several position identification methods have been used for mobile robots. Dead reckoning is a popular method, but is not reliable for long distances or uneven surfaces because of variations in wheel diameter and slippage. The landmark method, which estimates current position relative to landmarks, cannot be used in an uncharted environment. We have proposed a new method called ”Cooperative Posi...