Frequency hopping method for localization system
AssigneeNational Taiwan University
InventorsPolly Huang, Tsung-Han Lin, I-Hei Wu, Te-Yuan Huang, Seng-Yong Lau
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Abstract
A frequency hopping method for localization system is aimed to overcome the degradation of location accuracy due to radio interference if there are some other radio devices using the same radio frequency as a localization system. A Packet Reception Rate (PRR) thresholding or a learning-based approach for the diagnostic test is proposed. In that, a PRR thresholding or a set of parameters trained by Hidden Markov Model (HMM) is used as a criterion to decide whether or not to hop. The proposed hopping mechanism provides an accurate and stable localization with a minimum delay.
Claims20
A frequency hopping method for a localization system, comprising the steps of:
- (A) monitoring a beacon transmitter in the localization system within a tracking area;
- (B) going to Step (C) if the beacon transmitter is interfered by a signal;
- and
- (C) performing a frequency hopping to enter all beacon transmitters in the localization system into a stable frequency channel.
Dependencies are inferred from the claim text.