Indoor positioning system and positioning method thereof

Abstract

The invention discloses an indoor positioning system used for positioning a target object. The target object can transmit wireless base station signals. The indoor positioning system comprises a plurality of receivers, a processor and a database, wherein each receiver comprises an omnidirectional antenna and a plurality of directional antennas, and the omnidirectional antenna and the directional antennas are used for scanning the wireless base station signals sent by the target object; the processor is connected with the target object and the receivers and used for processing the wireless base station signals scanned by the receivers to obtain the positioning result of the target object and transmitting the positioning result back to the target object; the database is connected with the processor and used for storing position information of the positioned target object. According to the indoor positioning system, an intelligent handheld device of a user serves as an Access Point transmitting end, the receivers provided with the omnidirectional antenna and the directional antennas are arranged in the environment and used for detecting the intensity of signals of the intelligent handheld device, and most appropriate positioning services are provided through subregion distinguishing, auxiliary point distinguishing and other positioning calculation mechanisms.

Description

technical field [0001] The invention relates to mobile positioning technology, in particular to an indoor positioning system and a positioning method thereof. Background technique [0002] In recent years, with the rapid development of wireless communication and microelectronics technology, smart handheld devices can integrate more sensing devices and develop more diverse service content, which also imperceptibly drives location-based services (LBS) , Location Based Services) development. [0003] LBS in the prior art is divided into Tracking / Safety, Traffic / Travel, Information, Community, Pushing Marketing, LBS Game ) and other six major services, the primary purpose of which is positioning, so how to collect and process positioning information to make positioning more accurate and efficient. [0004] The commonly used positioning method in the prior art is Global Positioning System (GPS, Global Positioning System). Compared with other positioning systems, it has the wide...

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Problems solved by technology

[0004] The commonly used positioning method in the prior art is Global Positioning System (GPS, Global Positioning System). Compared with other positioning systems, it has the widest positioning range and can provide accurate positioning. Environmental interference factors such as forests will reduce the accuracy of GPS positioning

[0005] In order to ensure the service quality of indoor positioning, base station positioning, triangulation positioning, fingerprint positioning and other methods are often used in the prior art to assist or even replace the indoor positioning role of GPS. Among them, the commonly used indoor positioning media for triangulation positioning include: radio frequency (RF, Radio Frequency) signal (Wi-Fi, Zig-bee, Bluetooth), infrared, ultrasonic, optical, magnetic field strength, etc., the received signal information is used for distance measurement or angle measurement, and the distance measurement algorithm is mostly used: signal time of arrival TOA (Time Of Arrival), signal arrival time difference TDOA (Time Difference Of Arrivals), signal arrival angle AOA (Angle Of Arrival) and received signal strength index RSSI (Received Signal Strength Indication) to estimate the location of the target; and another A method different from the traditional ranging positioning method is fingerprint positioning, which uses relative concepts to replace absolute. The advantage of its positioning is that it can build a database by measuring reference point information when offline, and provide data for comparison during actual positioning. However, both triangular positioning and fingerprint positioning must rely on known wireless access point (AP, Wireless Access Point) information for positioning, resulting in AP construction locations and simple or complex environmental patterns. Affects the accuracy of indoor positioning. Once the environment changes, it is easy to cause positioning error rate

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