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

A sound wave communication and channel technology, applied in the direction of multi-frequency code system, etc., can solve the problems that hinder the development of sound wave communication, complex processing process, high bit error rate, etc., achieve good application prospects, low bit error rate, and improve 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...

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

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Embodiment Construction

[0046] 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.

[0047] Such as figure 1 As shown, the OFDM-based acoustic wave communication method of the present invention includes the following steps,

[0048] In step (1), the original data is channel-coded to expand the original data to obtain extended data; the original data here, that is, the content data of the information to be sent, can be any binary data, including but not limited to text, pictures , video, audio and other types of data, digital audio data is generated in the signal debugging module, and the expansion is to correct the errors accumulated in the communication process by adding supervision data;

[0049]Step (2), based on OFDM, the channel is divided into several orthogonal sub-cha...

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Abstract

The invention discloses a sound wave communication method on the basis of OFDM (orthogonal frequency division multiplexing). The sound wave communication method includes steps of modulating original data subjected to channel coding into sound wave signals of a data frame composed of a plurality of ODFM symbols, transmitting the sound wave signals via a loudspeaker, subjecting the sound waves received by a microphone to demodulating and channel decoding to restore 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 method, belonging 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 has...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 陈景竑陈相宁冯静衠
Owner 陈景竑
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