System and method for complex navigation using dead reckoning and GPS
First Claim
1. A system for complex navigation using dead reckoning (DR) and a global positioning system (GPS), the system comprising:
- a GPS receiving unit configured to receive GPS data;
a DR unit configured to generate DR information by using a wheel speed, a steering angle, and a yaw rate;
a buffer unit configured to store the DR information;
a filter unit configured to generate positioning information of a moving object by using at least one of output information from the GPS receiving unit and the DR information stored in the buffer unit; and
a fusion determining unit configured todetermine whether to fuse first location information of the moving object and second location information of the moving object,determine whether a difference between the first location information and the second location information exceeds a preset expected error, anddetermine, in response to the difference exceeding the expected error, that positioning is inaccurate and to generate positioning information of the moving object with only the second location information,wherein the filter unit is further configured to generate, in response to the fusion determining unit generating positioning information using both the first location information and the second location information, positioning information of the moving object using both the first location information and the second location information.
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Abstract
Provided are a system and method for complex navigation using dead reckoning and a global positioning system capable of enhancing robustness of positioning by compensating for discontinuity of GPS reception data. The system for complex navigation using dead reckoning (DR) and a global positioning system (GPS) includes a GPS receiving unit configured to receive GPS data, a DR unit configured to generate DR information by using a wheel speed, a steering angle, and a yaw rate, a buffer unit configured to store the DR information, and a filter unit configured to generate positioning information of a moving object by using at least one of output information from the GPS receiving unit and the DR information stored in the buffer unit.
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Citations
19 Claims
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1. A system for complex navigation using dead reckoning (DR) and a global positioning system (GPS), the system comprising:
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a GPS receiving unit configured to receive GPS data; a DR unit configured to generate DR information by using a wheel speed, a steering angle, and a yaw rate; a buffer unit configured to store the DR information; a filter unit configured to generate positioning information of a moving object by using at least one of output information from the GPS receiving unit and the DR information stored in the buffer unit; and a fusion determining unit configured to determine whether to fuse first location information of the moving object and second location information of the moving object, determine whether a difference between the first location information and the second location information exceeds a preset expected error, and determine, in response to the difference exceeding the expected error, that positioning is inaccurate and to generate positioning information of the moving object with only the second location information, wherein the filter unit is further configured to generate, in response to the fusion determining unit generating positioning information using both the first location information and the second location information, positioning information of the moving object using both the first location information and the second location information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for complex navigation using dead reckoning (DR) and a global positioning system (GPS), the system comprising:
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a GPS receiving unit configured to receive GPS data and provide a position of a visible satellite and pseudo-range information at every first period; a DR unit configured to generate DR information at every second period by using a wheel speed, a steering angle, and a yaw rate; a buffer unit configured to store a preset number of pieces of DR information which have been generated at a point in time earlier than the current point in time; a filter unit configured to generate positioning information of a moving object at every third period by using at least one of output information from the GPS receiving unit and the DR information stored in the buffer unit; and a fusion determining unit configured to determine whether to fuse first location information of the moving object and second location information of the moving object, determine whether a difference between the first location information and the second location information of the moving object exceeds a preset expected error, and determine, in response to the difference exceeding the expected error, that positioning is inaccurate and to generate positioning information of the moving object with only the second location information, wherein the filter unit is further configured to generate, in response to the fusion determining unit generating positioning information using both the first location information and the second location information, positioning information of the moving object using both the first location information and the second location information, and wherein, in response to output information from the GPS receiving unit being input at a point in time corresponding to the third period, the filter unit selects DR information synchronized with the output information from the GPS receiving unit, from the buffer in consideration of a time delay between the GPS receiving unit and the DR unit, and generates positioning information of the moving object by using the output information from the GPS receiving unit and the selected DR information. - View Dependent Claims (12)
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13. A location estimating method of a system for complex navigation using dead reckoning (DR) and a global positioning system (GPS), the location estimating method comprising:
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processing received GPS data to generate first location information of a moving object; generating second location information of the moving object by using a wheel speed, a steering angle, and a yaw rate; storing the second location information; generating positioning information of the moving object by using at least one of the first location information and the stored second location information; determining whether to fuse first location information of the moving object and second location information of the moving; determining whether a difference between the first location information and the second location information exceeds a preset expected error; determining, in response to the difference exceeding the expected error, that positioning is inaccurate and to generate positioning information of the moving object with only the second location information; and generating, in response to the fusion determining unit generating positioning information using both the first location information and the second location information, positioning information of the moving object using both the first location information and the second location information. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification