Receiving signal intensity calibration method and device

Abstract

The invention discloses a receiving signal intensity calibration method and device. A detection signal transmitted by a calibration signal transmitting coil is received; the detection signal includesa first distance between a low frequency signal receiving entity and the calibration signal transmitting coil, a first driving current of the calibration signal transmitting coil, and a first low frequency signal; the first low frequency signal is measured to obtain first actually-received signal intensity; according to the first distance and the first driving current, a preset calibration table is queried to obtain a first field intensity compensation value; the first actually-received signal intensity is calibrated according to the first field intensity compensation value to obtain a first actually-received signal intensity after calibration. The method is advantaged in that through establishing the standard table in advance, the first actually-received signal intensity is calibrated, accurate positioning is realized according to the calibrated first actually-received signal intensity, if a PEPS system is utilized, the accurate distance between the low frequency signal receiving entity and a belonging vehicle can be calculated, and vehicle doors are timely unlocked.

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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