SPEED ESTIMATION METHOD
First Claim
1. A speed estimation method, comprising:
- a reference value establishing step determining a plurality of training locations and establishing a reference signal strength set for each of the training locations, wherein the reference signal strength set represents the signal strengths of a respective one of the training locations to a plurality of base stations;
an actual value establishing step establishing an actual signal strength set of a communication device at a time point, wherein the actual signal strength set represents the signal strengths of the communication device to the base stations;
an approximate location calculating step calculating a plurality of signal strength differences according to the actual signal strength set and the reference signal strength set, and setting those training locations with smaller signal strength difference as a plurality of approximate locations;
a weight location calculating step calculating a weight location of the communication device according to the plurality of approximate locations;
a weight location determining step determining whether two weight locations of the communication device at two continuous time points are obtained, wherein the actual value establishing step is performed if the determination is negative; and
a speed calculating step calculating a speed of the communication device based on the two weight locations at the two continuous time points if the determination of the weight location determining step is positive.
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Abstract
A speed estimation method including a reference value establishing step, an actual value establishing step, an approximate location calculating step, a weight location calculating step, a weight location determining step and a speed calculating step is disclosed. The reference value establishing step determines a plurality of training locations and establishes a reference signal strength set for each training location. The actual value establishing step establishes an actual signal strength set of a communication device at a time point. The approximate location calculating step calculates a plurality of signal strength differences according to the actual signal strength set and the reference signal strength set, and generates a plurality of approximate locations. The weight location calculating step calculates a weight location of the communication device. The weight location determining step determines whether two weight locations are obtained. The weight location determining step calculates a speed of the communication device.
5 Citations
4 Claims
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1. A speed estimation method, comprising:
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a reference value establishing step determining a plurality of training locations and establishing a reference signal strength set for each of the training locations, wherein the reference signal strength set represents the signal strengths of a respective one of the training locations to a plurality of base stations; an actual value establishing step establishing an actual signal strength set of a communication device at a time point, wherein the actual signal strength set represents the signal strengths of the communication device to the base stations; an approximate location calculating step calculating a plurality of signal strength differences according to the actual signal strength set and the reference signal strength set, and setting those training locations with smaller signal strength difference as a plurality of approximate locations; a weight location calculating step calculating a weight location of the communication device according to the plurality of approximate locations; a weight location determining step determining whether two weight locations of the communication device at two continuous time points are obtained, wherein the actual value establishing step is performed if the determination is negative; and a speed calculating step calculating a speed of the communication device based on the two weight locations at the two continuous time points if the determination of the weight location determining step is positive. - View Dependent Claims (2, 3, 4)
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Specification
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- Resources
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Current AssigneeNational Pingtung University of Science and Technology
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Original AssigneeBon-Yeh Lin, Chi-Chun Lo, Chi-Hua Chen, Chun-Hao Lin, Hsu-Yang Kung, Yan-Si Liu
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InventorsKUNG, Hsu-Yang, LO, Chi-Chun, CHEN, Chi-Hua, LIN, Bon-Yeh, LIN, Chun-Hao, LIU, Yan-Si
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Application NumberUS13/359,868Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current342/461CPC Class CodesG01S 11/02 using radio waves G01S19/00...G01S 11/06 using intensity measurementsH04W 64/006 with additional information...
