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Sound wave communication method and system

A sound wave communication and sound signal technology, applied in multi-carrier systems, phase-modulated carrier systems, multi-frequency code systems, etc., can solve the problems of long transmission time and low efficiency, achieve high signal quality, convenient use, and improve environmental resistance The effect of interference ability

Inactive Publication Date: 2016-03-02
FUJIAN TQ DIGITAL
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Problems solved by technology

It is conceivable that when the amount of data is large, the transmission time required for such a transmission method is very large, so its efficiency is low

Method used

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  • Sound wave communication method and system
  • Sound wave communication method and system
  • Sound wave communication method and system

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Embodiment Construction

[0090] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0091] The operation process of the sending end of the acoustic wave communication method described in an embodiment of the present invention includes the following steps:

[0092] S11. Split the data to be sent according to a preset length condition to obtain several data units.

[0093] In this step, first select or edit the specific content to be sent, calculate the length of the data to be sent, and then split the data to be sent with a length of no more than 40 bytes according to the system settings in the actual application to obtain several data units . Subsequent data processing will be carried out separately for each data unit. When the original length of the data to be sent already meets the preset length condition, this s...

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Abstract

The invention discloses a sound wave communication method. The method is characterized in that a sending terminal processes one data unit in data to be sent and the processing comprises the following steps of setting verification coding; modulating the data unit to M carrier waves according to a preset coding rule, wherein the M is a positive integer which is greater than or equal to 2; adding a synchronization code; adding a cyclic prefix; and generating and sending a sound signal. A receiving terminal receives the sound signal and carries out processing and the processing comprises the following steps of carrying out analog-digital conversion on the sound signal and acquiring a digital sequence; carrying out down conversion processing on the digital sequence; carrying out synchronization processing on a complex sequence obtained from down conversion; carrying out fast Fourier transform on data obtained through the synchronization processing so as to acquire a time domain signal; carrying out reduction processing on the time domain signal; carrying out phase demodulation processing on the reductive signal, wherein a demodulation method corresponds to a modulation method used by a sending system; carrying out verification processing on the signal after phase demodulation; and restoring a binary sequence so as to obtain original information.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an acoustic wave communication method and system. Background technique [0002] For the currently commonly used local area and near-field communication technologies, such as Bluetooth and WiFi, both communication parties need to be paired before communication, and additional equipment is required; while NFC / RIFD technology usually also requires special equipment, and is often used for data exchange. to transfer. For the technology in the field of acoustic wave communication for data transmission, ultrasonic communication is commonly used, which also requires additional devices to realize, which will increase the cost of transmission, and it is also difficult to ensure the efficiency of technology implementation. [0003] At present, the frequency range that a general portable device can play and record is 0-22KHz. The interference in the 0-2KHz frequency band is relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/20H04L27/38
Inventor 关胤齐昕吴拥民陈宏展刘德建
Owner FUJIAN TQ DIGITAL
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