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Method and device for eliminating ultrasonic noise of base station, computer equipment and medium

A technology of ultrasonic and computer programs, applied in the direction of modulated carrier system, frequency modulated carrier system, digital transmission system, etc., to achieve the effect of reducing middle and low frequency noise

Inactive Publication Date: 2021-10-08
深圳市海豚科技创新有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method, device, computer equipment and medium for eliminating ultrasonic noise in base stations, so as to solve the problem of maintaining the effect of accurately identifying the arrival time of signals while eliminating noise

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  • Method and device for eliminating ultrasonic noise of base station, computer equipment and medium
  • Method and device for eliminating ultrasonic noise of base station, computer equipment and medium
  • Method and device for eliminating ultrasonic noise of base station, computer equipment and medium

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] The method for eliminating the ultrasonic noise of the base station provided by the embodiment of the present invention can be applied in such as figure 1 In an application environment, the method for eliminating base station ultrasonic noise is applied in a system for eliminating base station ultrasonic noise, and the system for eliminating base station ultrasonic noise includes a client and a server, wherein the client communicates with the ser...

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Abstract

The invention discloses a method and a device for eliminating ultrasonic noise of a base station, computer equipment and a medium. The method for eliminating the ultrasonic noise of the base station comprises the following steps: a transmitting base station processes a chirp signal by adopting a window function, obtains a first spindle-shaped signal corresponding to the chirp signal, and sends the first spindle-shaped signal to a receiving base station; the receiving base station processes the reference signal by using the same window function to obtain a second spindle-shaped signal corresponding to the reference signal; a corresponding cross-correlation amplitude maximum value is obtained based on a convolution value formed by the first spindle-shaped signal and the second spindle-shaped signal; and the signal arrival time is acquired based on the maximum value of the cross-correlation amplitude and the sampling frequency. According to the method, the chirp signal is windowed, and the low and medium frequency noise generated when the sound signal base station transmits the ultrasonic signal is greatly reduced on the premise that hardware is not changed and the signal starting or ending time recognition effect is not reduced.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a method, device, computer equipment and medium for eliminating ultrasonic noise of a base station. Background technique [0002] The hearing threshold of the human ear is below 20kHz, that is, people should not be able to hear signals greater than 20kHz. However, due to the truncation of the signal, the limited response performance of the amplifier circuit of the acoustic signal transmitting base station and the speaker, the emitted acoustic signal will be distorted, that is, the input waveform of the acoustic signal is inconsistent with the output waveform of the speaker, and the signal spectrum will be distorted, originally concentrated in the specified frequency band The energy of the base station is dispersed to other frequencies, causing the sound from the base station to appear as noise audible to the human ear. For example, a chirp signal with a frequency abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/10H04L27/12H04B1/04
CPCH04B1/0475H04L27/103H04L27/12
Inventor 李莹洁黄力成王世超
Owner 深圳市海豚科技创新有限公司
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