Weighted naive Bayes indoor positioning method based on attribute independence
An indoor positioning and Bayesian technology, which is applied in the directions of location information-based services, specific environment-based services, electrical components, etc., can solve the problems of complex, high complexity and low accuracy of the fingerprint database, and achieve a simplified fingerprint database. Effect
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[0053] The present invention will be further described below in conjunction with the accompanying drawings.
[0054] 1. Establish the CSI sample set of the location point: Assume that there are m transmitting antennas (TX) and n receiving antennas (RX) in the system, so L=m*n sending and receiving links are formed, and each sending and receiving link has contains 30 subcarriers, then each CSI data packet contains m*n*30 CSI complex values. In the present invention, it is set that the number of transmitting antennas is 1, the number of receiving antennas is 3, and the CSI data is a complex matrix of 1*3*30.
[0055] 2. CSI data preprocessing: the present invention first utilizes the Raida criterion to process the original CSI data set of each location, thereby eliminating data that is mutated due to noise and other reasons. First, you need to find the standard deviation of each feature value, and then compare the difference between each data and the mean of the same feature. I...
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