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Radio positioning system and positioning method thereof

A radio positioning and wireless link technology, used in radio wave measurement systems, positioning, wireless communication and other directions, can solve the problems of insufficient positioning accuracy, high occupied bandwidth, complex structure, etc., to achieve low power management and reduce system power consumption , the effect of reducing system complexity

Active Publication Date: 2020-05-22
CHENGDU UNIV OF INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the radio positioning system and its positioning method provided by the present invention solve the problems of complex structure of the radio positioning system, insufficient positioning accuracy and high bandwidth occupation

Method used

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  • Radio positioning system and positioning method thereof
  • Radio positioning system and positioning method thereof
  • Radio positioning system and positioning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 As shown, a radiolocation system includes at least three master devices and several slave devices;

[0042] Each master device communicates with each slave device through a wireless link, and one master device among all master devices serves as the master controller of the radiolocation system;

[0043] Each main device includes a baseband signal generation circuit, a signal transmission circuit, a phase detection circuit, a first main control and communication circuit and a signal reception circuit;

[0044] Each slave device includes a second main control and communication circuit, a receiving front-end circuit, a frequency mixing filter circuit and a transmitting front-end circuit;

[0045] The output end of the baseband signal generation circuit is respectively connected with the input end of the signal transmission circuit and the first input end of the phase detection circuit, the output end of the signal transmission circuit is connected with the i...

Embodiment 2

[0051] like image 3 As shown, the baseband signal generating circuit in the above-mentioned Embodiment 1 includes a chip U10 of a programmable waveform generator;

[0052] The COMP pin of the chip U10 is connected to the ground capacitor C75;

[0053] The VDD pin of the chip U10 is connected to the 3.3V power supply;

[0054] The CAP pin of the chip U10 is connected to the ground capacitor C76;

[0055] The DGND pin of chip U10 is grounded;

[0056] The MCLK pin of chip U10 is connected to the OUT pin of crystal oscillator Y1;

[0057] The VOUT pin of the chip U10 is used as the output terminal BBOUT of the baseband signal generation circuit to be connected to the input terminal BBIN of the signal transmission circuit and the first input terminal BBIN1 of the phase detection circuit respectively;

[0058] The AGND pin of chip U10 is grounded;

[0059] The FSYNC pin of the chip U10 is connected with the first main control and communication circuit;

[0060] The SCLK pin ...

Embodiment 3

[0067] The signal transmission circuit in the above-mentioned Embodiment 1 includes a chip U9 for signal transmission, a first filtering sub-circuit and a transmitting antenna sub-circuit;

[0068] in as Figure 4 In the peripheral circuit of the chip U9 shown, the GND pin of the chip U9 is grounded;

[0069] The SPI_SE pin of the chip U9 is respectively connected with the grounding resistor R34 and the first main control and communication circuit;

[0070] The S pin of the chip U9 is connected to the grounding resistor R33;

[0071] The BX pin of the chip U9 is respectively connected with one end of the resistor R32 to the first main control and communication circuit, and the other end of the resistor R32 is connected to the 3.3V power supply;

[0072] The SPIDATA / CS0 pins of the chip U9 are respectively connected with one end of the resistor R31 to the first main control and communication circuit, and the other end of the resistor R30 is connected to the 3.3V power supply;...

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Abstract

The invention discloses a radio positioning system and a positioning method thereof. The positioning system comprises at least three master devices and a plurality of slave devices. Each master deviceis in communication connection with each slave device through a wireless link, and one master device in all the master devices serves as a master controller of a radio positioning system; each masterdevice comprises a baseband signal generation circuit, a signal sending circuit, a phase detection circuit, a first main control and communication circuit and a signal receiving circuit; each slave device comprises a second main control and communication circuit, a receiving front-end circuit, a frequency mixing filter circuit and a sending front-end circuit. According to the invention, by changing the signal receiving circuit, the phase delay of the system is reduced, and the complexity of the system is further reduced; the reliability of the system during ranging is improved by an improvedsystem ranging algorithm and adding matched circuits such as a baseband signal generation circuit; the positioning system provided by the invention is low in complexity, small in influence of the environment on distance measurement, low in system power consumption and low in bandwidth occupation.

Description

technical field [0001] The invention belongs to the technical field of radio positioning methods, and in particular relates to a radio positioning system and a positioning method thereof. Background technique [0002] With the rapid popularization of mobile terminals and the Internet of Things, people's demand for positioning indoor equipment is increasing. The radio positioning system refers to the technology of using the straight-line constant-speed propagation characteristics of radio waves to locate the position of fixed or moving objects; therefore , To achieve radio positioning, radio ranging is an indispensable link. The existing radio ranging mainly includes RSSI (Received Signal Strength Indication, received signal strength indication) and UWB (Ultra Wideband, wireless carrier communication technology), UWB The accuracy is relatively high, but the frequency band used is very wide, which has high requirements for the design of the system. The phase-based ranging has ...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W52/02G01S5/10
CPCG01S5/10H04W52/0209H04W64/00Y02D30/70
Inventor 贺永鑫姜丹丹叶松丁川
Owner CHENGDU UNIV OF INFORMATION TECH
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