Construction method of indoor mixed fingerprint map
A construction method and technology of fingerprint map, which can be used in services, electrical components, wireless communication and other directions based on specific environments, which can solve the problem of WiFi signals being easily affected by the environment, and achieve the effect of improving adaptability.
Active Publication Date: 2019-09-27
GUANGDONG UNIV OF TECH
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Problems solved by technology
[0006] In order to solve the problem that WiFi signals in the indoor environment are easily affected by the environment, the present invention provides a method for constructing an indoor mixed fingerprint map, which is based on the data processing method of adding a ratio to the original fingerprint data to improve the time-varying adaptability of the data, and solves the indoor Ambient WiFi signals are vulnerable to the environment
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Embodiment 1
[0049] Such as figure 1 Said, an indoor hybrid fingerprint map construction method, the construction method includes the following steps:
[0050] S1: Set up data collection points in the indoor environment, and conduct WiFi data collection in the indoor environment;
[0051] Specifically, divide the indoor environment into small squares of L*L, where 1m≤L≤3m, set a data collection point at the center of the small square, and the sequence of collection points is RP={RP 1 , RP 2 ,..., RP n ,..., RP N };
[0052] In the formula, n represents the nth collection point of the indoor environment; N represents the number of indoor environment collection points;
[0053] Each RP is transformed into an independent numerical label as a class label for data collection, and WiFi data collection is performed on all collection points.
[0054] S2: Count the collection of wireless access point APs detected by all collection points in the room, and construct a preliminary RSSI fingerprint database wit...
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The invention discloses a construction method of an indoor mixed fingerprint map, which comprises the following steps of setting a data acquisition point in an indoor environment, and performing WiFi data acquisition on the indoor environment; counting a set of wireless access points (APs) detected by all indoor collection points, and constructing a preliminary RSSI fingerprint database by using the APs detected by all the indoor collection points; constructing an offline Ratiomap sequence by using the obtained preliminary RSSI fingerprint database, analyzing the offline Ratiomap sequence, setting a threshold value, filtering abnormal data, and standardizing the offline Ratiomap sequence; constructing an offline Radiomap sequence by using the obtained preliminary RSSI fingerprint database, and carrying out normalization processing; and combining the offline Radio map sequence obtained in the above step with an offline Radio map sequence, and constructing an offline mixed fingerprint map Hyberd map sequence. According to the method, the offline Radio map sequence and the offline Radio map sequence are combined to construct the offline mixed fingerprint map Hybrid map sequence, and a ratio feature construction method is added in the construction process, so that the adaptability of fingerprint data to indoor environment time varying is improved.
Description
Technical field [0001] The invention relates to the technical field of indoor positioning, and more specifically, to a method for constructing an indoor hybrid fingerprint map. Background technique [0002] Location services have occupied an important position for a long time. At present, outdoor satellite-based positioning systems such as Beidou and GPS basically meet people's outdoor location service needs. However, due to the influence of factors such as signal attenuation and obstacles to signal propagation, satellite-based The positioning method is less effective in indoor location services. As people spend far more indoors than outdoors in a day, indoor positioning has broad application prospects in daily life, public safety and commercial services. [0003] The increasing demand for indoor location services has led to the successive proposals of indoor positioning methods based on infrared, UWB and vision. These methods can achieve satisfactory results in indoor positioning...
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Login to View More IPC IPC(8): H04W4/33H04W64/00
CPCH04W64/006H04W4/33
Inventor 刘震宇戴彬万祥魏林超孙泰洪绿旋
Owner GUANGDONG UNIV OF TECH