Method and device for calibrating received signal strength

Abstract

The invention discloses a calibration method and device for receiving signal strength, which receives a detection signal transmitted by a calibration signal transmitting coil; the detection signal includes the first distance between a low-frequency signal receiving entity and the calibration signal transmitting coil, and the first drive of the calibration signal transmitting coil current and the first low-frequency signal; measure the first low-frequency signal to obtain the first actual received signal strength; query the preset calibration table according to the first distance and the first driving current to obtain the first field strength compensation value; according to the first field strength compensation The value is calibrated to the first actual received signal strength to obtain the calibrated first actual received signal strength. The present invention calibrates the first actual received signal strength by pre-establishing a calibration table, and realizes accurate positioning according to the calibrated first actual received signal strength. For example, when applied to the PEPS system, the vehicle can calculate the low-frequency signal received The exact distance between the entity and the vehicle it belongs to, unlocking the door in time.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a method and device for calibrating received signal strength. Background technique [0002] The keyless entry and start system (Passive Entry Passive Start, PEPS) is an intelligent electronic anti-theft system. This system can realize the function that the low-frequency signal receiving entity can automatically unlock the door within a certain range of the vehicle. Can enter the car. In the PEPS system, the low-frequency signal receiving entity uses the received signal strength of the low-frequency signal as the received signal strength indicator (RSSI) to locate the low-frequency signal receiving entity. There are relatively strict requirements for the accuracy of the entity to measure the received signal strength. [0003] In the application process of the PEPS system, the low-frequency signal receiving entity measures the low-frequency signal sent by its own vehicle to obtain ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method and device for calibrating received signal strength, which can solve the problem in the prior art that the vehicle door cannot be unlocked due to an error between the distance calculated by the actual received signal strength fed back by the low-frequency signal receiving entity to the vehicle and the actual distance.

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