Acoustic communication system and method

A technology of sound wave communication and sound wave signal, which is applied in the field of communication, can solve the problems of increased data transmission bit error rate, low transmission rate, and limited distance of sound wave communication data, etc. The effect of strong Puller performance

Active Publication Date: 2017-02-01
武汉果冻网络科技有限公司
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Problems solved by technology

However, the data distance of the existing acoustic wave communication is relatively limited, the transmission rate is low (only up to 16bit / s), and when the communication distance is slightly longer, the bit error rate of the data transmission will also increase significantly

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Embodiment approach

[0064] see Figure 7 A preferred embodiment of the acoustic wave communication method of the present invention includes the following steps:

[0065] In step S730, a first processing device encodes a digital signal to output a corresponding encoded signal.

[0066] In step S732, a modulation device performs a modulation operation on the coded signal to output a corresponding modulated signal.

[0067] In step S734, the first processor adds a synchronization signal, a guard interval, and a parity field to the modulated signal to generate a modulated signal.

[0068] Step S736, converting the modulated signal into an acoustic wave signal through an output device.

[0069] Step S738, a receiving device receives the sound wave signal output by the output device, and generates a processed signal corresponding to the sound wave signal.

[0070] In step S740, a demodulation device demodulates the processed signal to obtain a corresponding demodulated signal.

[0071] Step S742, o...

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Abstract

The invention relates to an acoustic communication system. The acoustic communication system comprises a serial-to-parallel conversion unit and a carrier signal generator; the serial-to-parallel conversion unit is used for grouping a coded signal, so that a number of groups can be obtained; the serial-to-parallel conversion unit is also used for performing serial-to-parallel conversion of each group, so that a corresponding high bit word and low bit word in the group can be obtained; the carrier signal generator is used for respectively performing key control of a nonlinear Chrip modulator and a FSK modulator according to the low bit word and the high bit word in the group; the carrier signal generator performs cascade operation of a first-level generated signal and a second-level generated signal generated after key control, so that a corresponding modulated signal is obtained; and the modulated signal is converted into an acoustic signal through an output device. The invention further provides an acoustic communication method. By means of the acoustic communication system and method disclosed by the invention, due to cascade modulation of the nonlinear Chrip modulator and the FSK modulator, the instantaneous frequency of the modulated signal changes up and down in a certain range; and thus, the information transmission rate also can be increased.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an acoustic wave communication system and method. Background technique [0002] With the advent of the mobile Internet era and the widespread deployment of audio user interfaces (such as microphones and speakers), the acoustic wave communication technology based on the air channel is being more and more widely used. Compared with traditional wireless communication technologies, such as WiFi, Bluetooth, etc., the advantages of using sound waves for data transmission are mainly convenience and low cost. However, the data distance of the existing acoustic wave communication is relatively limited, the transmission rate is low (only up to 16bit / s), and when the communication distance is slightly longer, the bit error rate of the data transmission will also increase significantly. Contents of the invention [0003] In view of the above, it is necessary to provide an ac...

Claims

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Application Information

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IPC IPC(8): H04B11/00H04L1/00
CPCH04B11/00H04L1/0058
Inventor 骆志坤姚彬
Owner 武汉果冻网络科技有限公司
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