in this paper, we present the results of a hierarchical slam/gps/ins/wlfp sensor fusion to be used in navigation system devices. due to low quality of the inertial sensors, even a short-term gps failure can lower the integrated navigation performance significantly. in addition, in gps denied environments, most navigation systems need a separate assisting resource, in order to increase the avail...

The purpose of a navigation system installed on a car is to help drivers in order to select an optimal path to reach the destination. In most of these systems, Global Positioning System (GPS) are used to determine vehicle position. There are number of error sources that undermine the quality of GPS measurements for car navigation systems. For this reason, technique like Map Matching (MM) is req...

Most car navigation systems estimate the car position from dead reckoning and the Global Positioning System (GPS). However, because of the unknown GPS noise, the estimated position has an undesirable error. To solve this problem, a map-matching method is introduced, which uses a digital road map to correct the position error. In this paper, a novel adaptive-fuzzy-network-based -measure algorith...

Recently, ASR (Automatic Speech Recognition) functions have commercially been used for various consumer applications including car navigation systems. However, many technical and usability problems still exist before ASR applications are on real business use. Our goal is to make ASR technologies for a real business use. To do so, we first evaluate a car navigation interface which has ASR as an ...

The automobile industry has become a communication tool facilitating the movement of people as well as providing a means of transport. In particular, car navigational systems that support safe and comfortable driving are becoming more and more sophisticated. When a car navigation system was first put into practical use, its function was only to display maps using a CD-ROM. Later, however, techn...

Although usability is a broad subject, the literature relating to in-car navigation devices tends to focus primarily on efficiency of use. In this paper, we explore the neglected issue of learnability, that is the ease with which users learn to use, as well as some justification of its importance as a distinct issue. We present an evaluation method designed to identify learnability related prob...

The paper outlines the development and design of a speech driven control for a personal in-car navigation system which runs on a standard Pocket PC. The modified system enables speech driven menu navigation, speech shortcut commands and interactive dialogues. The speech recognition method is presented, sources of inaccurate recognition are identified, and solutions are presented. Speech recogni...

A survey of the information sources and information fusion technologies used in the current in-car navigation systems is presented. The pros and cons of the four commonly used information sources GNSS/RF-based positioning, vehicle motion sensors, vehicle models and map information are described. Common filters to combine the information from the various sources are discussed. A prediction of po...

Nowadays, car navigation systems are widely used for providing directions to drivers’ destination. However, they do not always recommend a route that perfectly matches the driver’s intent. Even when drivers intentionally change the driving route from the recommended one to another, most of car navigation systems lead them back to the original recommended route. Such recommendations may not adeq...