A keyless entry and keyless start system positioning method

A keyless start, keyless entry technology, applied in radio wave measurement systems, wireless communications, transportation and packaging, etc., can solve the problems of not fully considering the changing characteristics of RSS signals and the impact of ranging results.

Active Publication Date: 2022-07-05
SHANGHAI JIAOTONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing technology does not fully consider the variation characteristics of RSS signals based on time and space. When the signal fluctuates, it will have a great impact on the ranging results

Method used

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  • A keyless entry and keyless start system positioning method
  • A keyless entry and keyless start system positioning method
  • A keyless entry and keyless start system positioning method

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Embodiment Construction

[0086] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0087] In the drawings, structurally identical components are denoted by the same numerals, and structurally or functionally similar components are denoted by like numerals throughout. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thicknesses of components are appropriately exaggerated in some places in the drawings.

[0088] like figure 1 As shown, this embodiment provides a method for locating a keyless entry and keyless start sys...

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Abstract

The invention discloses a method for keyless entry and keyless system positioning, and relates to the technical field of wireless communication and positioning. The method includes the following main steps: Step 1: Extended Kalman algorithm distance estimation, according to RSS signals through the extended Kalman algorithm Realize the tracking and positioning of the smart key; Step 2: Adaptive update of the RSS signal distance model parameters, based on the distance measurement value of the smart key in Step 1, real-time correction of the RSS signal distance model parameters; Step 3: Based on the improved Logistic regression location fingerprint algorithm. The invention takes the vehicle interior and exterior identification algorithm based on the extended Kalman filter algorithm and the improved Logistic regression as the core to solve the key problem of the intelligent key positioning of the keyless entry and keyless start system, and can effectively improve the intelligent key based on the low-power bluetooth RSS signal. The key positioning accuracy and positioning range improve the robustness of keyless entry and keyless start systems.

Description

technical field [0001] The invention relates to the technical field of wireless communication and positioning, in particular to a positioning method for a keyless entry and keyless start system. Background technique [0002] Smartphone-based keyless entry and start system (Passive Entry & Passive Start, PEPS) is an important development direction of the next generation of automotive PEPS. This technology is a positioning technology based on smart phones and low-power Bluetooth, and aims to replace the technical solution of the existing high-frequency and low-frequency PEPS system. Bluetooth PEPS technology enables keyless entry and start using the user's smartphone, eliminating the need for a car's dedicated key. There are still many problems to be studied in the keyless entry and start based on Bluetooth low energy consumption, such as accurate identification of the inside and outside of the car, estimation of the distance between the car and the smart key, and so on. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S11/06H04W64/00H04W4/40H04W4/80
CPCH04W4/40H04W4/80H04W64/00G01S11/06Y02D30/70
Inventor 赵忠华曹一文鲁兴龙晏懿琳吉小军杨剑庞晓峰李达
Owner SHANGHAI JIAOTONG UNIV
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