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OFDM (Orthogonal Frequency Division Multiplexing) transmission method and device based on floating probability and bubble sorting encryption

A technology of bubble sorting and transmission method, applied in the field of communication, can solve the problems of high bit error rate and weak anti-noise ability, and achieve the effect of reducing system bit error rate, strong anti-noise ability, and reducing average power

Active Publication Date: 2022-03-29
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0003] In the prior art, there are various encryption methods in the OFDM data information transmission system, but the existing problem is that during the transmission process, the encrypted carrier is easily disturbed by external noise, which leads to a high bit error rate of the system , the system's ability to resist noise is weak

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  • OFDM (Orthogonal Frequency Division Multiplexing) transmission method and device based on floating probability and bubble sorting encryption
  • OFDM (Orthogonal Frequency Division Multiplexing) transmission method and device based on floating probability and bubble sorting encryption
  • OFDM (Orthogonal Frequency Division Multiplexing) transmission method and device based on floating probability and bubble sorting encryption

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Embodiment Construction

[0026] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] refer to figure 1 , which is a schematic flow chart of the OFDM transmission method provided by the present invention.

[0028] In the embodiment of the present invention, the data at the sending end first undergoes serial-to-parallel conversion, is encrypted by floating probability constellation mapping, then enters OFDM modulation, and finally enters the transmission system through IFFT (Inverse Fast Fourier Transform). The key includes a masking vector and a disturbance factor. The masking vector is encrypted with a floating probability, and the disturbance factor is disturbed in OFDM modulation. The receiving end is opposite to the sending end. The signal passing through the transmission system first undergoes FFT (Fast Fourier Transform) and enters OFDM Demodulation is used for descrambling, and then the floating probability const...

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Abstract

The invention discloses an OFDM (Orthogonal Frequency Division Multiplexing) transmission method and device based on floating probability and bubble sorting encryption, and the method comprises the steps: obtaining a vector value of a corresponding masking vector according to a chaos sequence for a carrier subjected to quadrature amplitude modulation, and sequentially transferring a vector endpoint with a higher power level to a vector endpoint with a lower power level; for the carrier wave subjected to OFDM modulation, arranging the resource blocks according to the numerical value of the disturbance factor corresponding to each resource block according to the numerical value of the disturbance factor; and after the transmitted carrier is received, the disturbance factor sequence and the masking vector are used for decryption. By adopting the technical scheme, the probability of occurrence of low-amplitude value vector endpoints is increased, the nonlinear influence on signals is reduced, the average power of the system is effectively reduced, the anti-noise capability of the system is improved, the capacity of the system is improved, and the safety of the system is also ensured.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an OFDM transmission method and device based on floating probability and bubble sorting encryption. Background technique [0002] With the rapid development of science and technology, wireless communication technology is one of the most widely used technologies at present, and it is the fastest growing part of the communication industry so far, and communication security has become the focus of communication technology, especially Orthogonal Frequency Division Multiplexing The data information transmission using (OFDM, Orthogonal Frequency Division Multiplexing) technology is safe. [0003] In the prior art, there are various encryption methods in the OFDM data information transmission system, but the existing problem is that during the transmission process, the encrypted carrier is easily disturbed by external noise, which leads to a high bit error rate of the system , t...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04L27/26G06F17/14G06F17/18
CPCH04L9/001H04L27/2628G06F17/142G06F17/18
Inventor 黄景瑞王俊锋刘博任建新毛雅亚吴翔宇吴泳锋孙婷婷赵立龙戚志鹏李莹王凤哈特
Owner NANJING UNIV OF INFORMATION SCI & TECH
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