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Sound wave communication system on basis of OFDM (orthogonal frequency division multiplexing)

A sound wave communication and sound wave technology, applied in the modulation carrier system, ultrasonic/sonic wave/infrasonic wave transmission system, transmission system, etc., can solve the problems that hinder the development of sound wave communication, complex processing process, high bit error rate, etc., and achieve good application prospects, The effect of low bit error rate and improving efficiency

Active Publication Date: 2014-12-24
陈景竑
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the traditional sound wave communication, the processing process is complex, the bit error rate is relatively high, the efficiency of sound wave communication is suppressed, and the development of sound wave communication is hindered

Method used

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  • Sound wave communication system on basis of OFDM (orthogonal frequency division multiplexing)
  • Sound wave communication system on basis of OFDM (orthogonal frequency division multiplexing)
  • Sound wave communication system on basis of OFDM (orthogonal frequency division multiplexing)

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0039] Such as figure 1 As shown, the acoustic wave communication system based on OFDM of the present invention includes an acoustic wave transmitting end and an acoustic wave receiving end, the acoustic wave transmitting end includes a channel coding module, a signal modulation module, a DA conversion module and a loudspeaker connected in sequence, and the acoustic wave receiving end includes a sequentially connected Microphone, AD conversion module, signal demodulation module and signal decoding module, the channel coding module is used to receive the original data, and the signal decoding module is used to output the original data, where the original data is the content data of the informatio...

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Abstract

The invention discloses a sound wave communication system on the basis of OFDM (orthogonal frequency division multiplexing). The sound wave communication system includes that at a sound wave transmission end, original data are modulated into sound wave signals of a data frame composed of a plurality of OFDM symbols after channel coding, and the sound wave signals are transmitted through a loudspeaker; at a sound wave receiving end, a microphone receives the sound wave signals and the sound wave signals are subjected to demodulating and channel decoding and restored into the original data. During communication, the symbols are synchronized by pilot frequency information, the data frames are synchronized by inserting barker codes, processing is simplified, bit error rate is low, efficiency of sound wave communication is improved, the sound wave communication is developed, and the sound wave communication method has good application prospect.

Description

technical field [0001] The invention relates to an OFDM-based acoustic wave communication system, which belongs to the technical field of wireless communication. Background technique [0002] The sound wave frequency below 24kHz can make full use of the existing video and audio playback equipment and receiving devices, without the need for specially customized speakers and microphones. The frequency that cannot be easily detected by the human ear will not have much impact on people's daily life. Therefore, Acoustic wave communication has been widely used. However, in the traditional field of acoustic wave communication technology, the processing process is complicated and the bit error rate is relatively high, which inhibits the efficiency of acoustic wave communication and hinders the development of acoustic wave communication. [0003] Orthogonal Frequency Division Multiplexing (OFDM) technology is a multi-carrier digital modulation technology. Although the concept of OFDM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B11/00
CPCH04B11/00H04L27/2602H04L27/2655H04L27/2656H04L27/2675H04L27/26524H04L27/2634H04L27/2662H04L27/2666
Inventor 陈景竑陈相宁冯静衠
Owner 陈景竑
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