Orthogonal multicarrier sending method, receiving method, device based on random phase rotation

An orthogonal multi-carrier and phase rotation technology, applied in the field of OFDM communication transmission, can solve the problems of low safety performance of OFDM signal transmission and the inability to effectively prevent demodulation judgment, so as to ensure the quality of signal transmission, ensure the safety and reliability of transmission, The effect of increasing difficulty

Pending Publication Date: 2021-11-16
湖南艾科诺维科技有限公司
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Problems solved by technology

[0010] To sum up, when transmitting OFDM signals in the prior art, all kinds of methods are easy to avoid being detected by communication and cannot be effectively prevented from being demodulated and judged by non-signal receivers, so the security performance of OFDM signal transmission is not high

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  • Orthogonal multicarrier sending method, receiving method, device based on random phase rotation
  • Orthogonal multicarrier sending method, receiving method, device based on random phase rotation
  • Orthogonal multicarrier sending method, receiving method, device based on random phase rotation

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Embodiment Construction

[0045]The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0046] Such as figure 1 As shown, the steps of the random phase rotation-based orthogonal multi-carrier transmission method in this embodiment include:

[0047] S01. Using the key in advance to randomly generate multiple phase rotation values;

[0048] S02. Perform phase rotation on each subcarrier in each frame of data of the OFDM signal to be transmitted using multiple pre-generated phase rotation values ​​to obtain a phase rotated OFDM signal, wherein each subcarrier corresponds to a different phase rotation value;

[0049] S03. Process the phase-rotated OFDM signal into a required format signal and send it out.

[0050] In this embodiment, when the transmitting end sends an OFDM signal, each subcarrier in each frame of OFDM signal data is phase-rotated usin...

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Abstract

The invention discloses an orthogonal multi-carrier sending method, receiving method, device based on random phase rotation, and the sending method comprises the steps: obtaining a to-be-sent OFDM signal, carrying out the phase rotation of each subcarrier in each frame of data of the to-be-sent OFDM signal through employing a plurality of phase rotation values generated in advance, obtaining a phase-rotated OFDM signal, wherein the phase rotation value is randomly generated by using a secret key, and each subcarrier respectively and correspondingly uses different phase rotation values; and converting the phase-rotated OFDM signal into a signal in a required format, and sending out the signal. The OFDM signal can be prevented from being demodulated by a non-destination receiving end during transmission, and the method has the advantages of being simple in implementation method, low in complexity, high in transmission safety and reliability and the like.

Description

technical field [0001] The present invention relates to the technical field of OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) communication transmission, in particular to an orthogonal multi-carrier transmission method, reception method and device based on random phase rotation. Background technique [0002] OFDM technology is an important technology in the fourth generation mobile communication system, and has played a leading role in the 5G mobile communication standard. OFDM improves spectrum utilization efficiency by utilizing the orthogonality between subcarriers, reduces intersymbol interference caused by multipath through cyclic prefix, and uses fast Fourier transform to realize OFDM signal modulation and demodulation. [0003] At present, in the data channel of OFDM communication, each subcarrier adopts a unified modulation method, generally MPSK (multiple phase shift keying, multi-ary digital phase modulation), MQAM (Mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L29/06
CPCH04L27/2626H04L27/2647H04L27/2697H04L63/16
Inventor 卢树军王萌孙恩元周资伟李斌
Owner 湖南艾科诺维科技有限公司
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