Positioning system and method based on multi-frequency joint measurement of wireless local area network
A wireless local area and positioning system technology, applied in the field of broadband multi-frequency and multi-antenna networks, can solve the problems of complex interference environment, influence user propagation channel measurement results, and complex propagation paths, and achieve large-scale support and user clustering. Positioning and network burden controllable effects
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Embodiment 1
[0025] Such as figure 1 and figure 2 As shown, this embodiment includes: a joint estimation unit, a user equipment, and three wireless access points 1, 2, and 3, wherein: the three wireless access points receive the signals transmitted by the user equipment at two frequency points by changing antenna angles. signal and process it, that is, observe the transmission channel of the user equipment, estimate the position of the user equipment relative to the wireless access point, and send the relative position information back to the joint estimation unit; the joint estimation unit combines the pre-stored information to estimate the user equipment The precise geographic location of the device, and timely update the user's geographic location.
[0026] The antenna can be a single receiving antenna or multiple receiving antennas.
[0027] The pre-stored information includes: antenna angle information and geographic location information of the wireless access point.
[0028] The ...
Embodiment 2
[0076] Such as Figure 5 As shown, this embodiment includes two wireless access points 1 and 2, and each wireless access point has three commonly used frequency points of 2.4GHz, 5GHz and 60GHz for access. For the convenience of description, it is assumed that the three frequency points have a direct path and a reflected path respectively.
[0077] The reference angle of arrival θ' and propagation time τ' may be as follows: the reference frequency point of wireless access point 1 is frequency point 1, and the reference frequency point of wireless access point 2 is frequency point 2. The joint estimation unit determines the direct path of wireless access point 1 frequency point 1 and wireless access point 2 frequency point 2 as a reference, and calculates wireless access point 1 frequency point 2, 3, wireless access point 2 frequency point 1 , The weight of the direct path of 3.
[0078] In this embodiment, multiple wireless access points estimate the angle of arrival and pro...
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