Multi-channel sound wave communication system and method

A sound wave communication and multi-channel technology, applied in the field of communication, can solve the problems of inability to transmit effective information, insufficient practicability, high bit error rate, etc., and achieve the effect of low cost and simple structure

Active Publication Date: 2012-07-25
浙江集速合芯科技有限公司
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Problems solved by technology

In the invention patent CN102202258.A with an application date of May 4, 2011, effective information cannot be transmitted simply by using ultrasonic frequency characteristics, and there are few frequency points; in the invention patent CN101247183A with

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  • Multi-channel sound wave communication system and method
  • Multi-channel sound wave communication system and method
  • Multi-channel sound wave communication system and method

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail in conjunction with the accompanying drawings and specific implementation examples:

[0049] The acoustic wave communication system of the present invention comprises an acoustic wave information generator and an acoustic wave information receiver, and the acoustic wave information receiver can simultaneously receive information sent by four acoustic wave information generators, such as figure 1 shown.

[0050] The acoustic wave communication system first needs to plan the channel. In order to realize ultrasonic-like communication, in this embodiment, it is planned to use the acoustic wave 18KHz to 22kHz as the acoustic wave communication frequency band. 44100Hz is the most commonly used audio sampling frequency in mobile terminal equipment. Considering equipment compatibility, the acoustic wave communication system...

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Abstract

The invention relates to a multi-channel sound wave communication system and method. Effective information can not be transmitted by purely using an ultrasonic wave frequency characteristic, and less frequency points exist. The information is transmitted by using amplitude modulation, and error rate is high. The multi-channel sound wave communication system comprises a sound wave information generator and a sound wave information receiver, wherein the sound wave information generator comprises a first microphone, a first analog to digital conversion module, a channel selection module, a DDS (Direct Digital Synthesizer) carrier generation module, an FSK (Frequency Shift Keying) modulation module, a code element information storage module, a coding module, a first clock module, a digital to analog conversion module, an analog filter module, an amplifier module and a speaker. The sound wave information receiver comprises a second microphone, a second analog to digital conversion module, a digital down converter module, a digital filter module, a down-sampling module, an automatic gain control module, a synchronous decision module and a second clock management module. The multi-channel sound wave communication system has a simple structure, and avoids that each path of traditional FSK demodulation is subjected to a large quantity of digital signal processing operation.

Description

technical field [0001] The invention relates to the technical field of communication, and in particular to a system and method for realizing information transmission between multiple devices, information reception and restoration, and multi-channel coexistence to prevent carrier conflict based on sound waves. Background technique [0002] With the commercialization of GSM digital mobile communication technology, mobile terminal equipment represented by mobile phones has become an essential tool for people's life, and on the basis of completing basic call functions, in recent years, technologies such as Bluetooth and NFC near field communication have been added to realize indoor precision. Positioning and mobile payment and many other functions. These basic functions are realized based on electromagnetic waves as the basic transmission medium, which require special hardware and equipment, and are expensive to implement. [0003] Different from the information transmissio...

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Application Information

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IPC IPC(8): H04L25/03H04L27/26H04B11/00
Inventor 赵良冉嘉刘东栋
Owner 浙江集速合芯科技有限公司
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