HABITS: a Bayesian filter approach to indoor tracking and location

Abstract

Abstract. Knowledge of the location of people and things has always been a valuable commodity. The explosion of new devices and techniques has brought people and item tracking out of the experimental stage and into the wider world. Using Wi-Fi signals is an attractive and reasonably affordable option to deal with the currently unsolved problem of widespread tracking in an indoor environment. HABITS (History Aware Based Indoor Tracking System) models human movement patterns by applying a discrete Bayesian filter to predict the areas that will, or will not, be visited in the future. We outline here the operation of the HABITS Real-Time Location System (RTLS) and discuss the implementation in relation to indoor Wi-Fi tracking with a large wireless network. Testing of HABITS shows that it gives comparable levels of accuracy to those achieved by doubling the number of access points. These probabilistic predictions may be used as an additional input into building automation systems for intelligent control of heating and lighting. It is twice as accurate as existing systems in dealing with signal black spots and it can predict the final destination of a person within the test environment almost 80% of the time.

Bluetooth an Optimal Solution for Personal Asset Tracking: A Comparison of Bluetooth, RFID and Miscellaneous Anti-lost Traking Technologies

“…This can be accomplished with the help Received Signal Strength Indicator, or else from the Arrival Time (AT) -or flight time (FT) in the Figure 3, given that the transmitter and the receiver are synchronized-for instance, by common time-base means, like in GPS [4,6]. Consequently, Furey et al (2012) argue that, when getting a signal from lone transmitter, one can position on a loop with the transmitter grounded. This argument is not very exact [6].…”

“…Consequently, Furey et al (2012) argue that, when getting a signal from lone transmitter, one can position on a loop with the transmitter grounded. This argument is not very exact [6]. It is better with a pair of transmitters-presently there just two places possible: the two situations where the circles round the masts meet.…”

“…The pros of a multilateration are that the antenna does not require the transmitted instant signals-therefore no need to synchronize transmitter and the receiver. The signals can be kept simple and hence electronics [6].…”

“…The camera lens collects the light and pictures it onto the radar or the array of the focal plane. Depending on the distance, then in a striking light encounters a lag argue by [6]. For instance light speed is approximated as c = 3.0 x 109 M/S, the delay is very concise, for example an object 2.5 m away will dawdle light by:…”

OPE-HCA: an optimal probabilistic estimation approach for hierarchical clustering algorithm

“…In addition to the above two kinds of clustering methods, probability-based clustering method has caused the great concern of many researchers in recent years [12][13][14][15][16][17][18][19][20][21]. Probability-based clustering method mainly includes model-based strategy [12][13][14][15][16] and evolutionary probabilistic modeling strategy [17][18][19][20][21].…”