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Method and transmitting structure of multicarrier differential chaos shift keying system PAPR

A shift keying and multi-carrier technology, which is applied in the modulation carrier system, multi-frequency code system, transmission system, etc., can solve the problems of in-band signal distortion, system performance degradation, spectrum spread interference, etc., and achieve good communication confidentiality Effect

Active Publication Date: 2020-02-28
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Since the dynamic range of general power amplifiers is limited, signals with a relatively large peak-to-average ratio can easily enter the nonlinear region of the power amplifier, resulting in nonlinear distortion of the signal, resulting in obvious spectrum spread interference and in-band signal distortion, resulting in The overall system performance is severely degraded

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  • Method and transmitting structure of multicarrier differential chaos shift keying system PAPR
  • Method and transmitting structure of multicarrier differential chaos shift keying system PAPR
  • Method and transmitting structure of multicarrier differential chaos shift keying system PAPR

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[0054] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0055] A method for multi-carrier differential chaotic shift keying system PAPR. In order to verify that the method of changing the structure of the signal transmitter and introducing the CI code provided by the present invention can reduce the peak-to-average ratio of MC-DCSK, the present invention lists a verification example Verify statement. like figure 1 As shown, the method of this verification example includes the following steps:

[0056] Step 1: Implementa...

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Abstract

The invention discloses a method and a transmitting structure of a multicarrier differential chaos shift keying system PAPR. The method comprises the following steps: sorting input signals, performingpacket transmission on signals obtained by multiplying modulated signals by chaotic signals, and introducing CI codes to expand the signals; the transmitting structure comprises a chaotic signal generator, a normalization processor, an input signal module, a signal encoder, a PSK modulator, a serial-parallel converter, N modulation multipliers, a CI code encoder and an inverse Fourier processor.Compared with an existing method under a multi-carrier differential chaos shift keying system, the influence of a modulation signal system on the peak-to-average ratio of the system can be ignored, and the effect of reducing the peak-to-average ratio of the system is more obvious.

Description

technical field [0001] The invention relates to a method for changing a signal transmission structure and introducing a CI code, which belongs to the technical field of chaos communication. Background technique [0002] In recent years, chaotic signals have broad development prospects and great practical value in the field of communication and information due to their good autocorrelation and sensitivity to initial values. Chaotic signals not only have good auto-correlation and cross-correlation, but also have statistical properties similar to white noise, which make chaotic signals very suitable for use as spreading codes in spread-spectrum communication. At the same time, by using the sensitivity of the chaotic signal to the initial value, a large number of approximately orthogonal chaotic signals can be obtained by changing its initial value. This characteristic is suitable for distinguishing different users in a multi-user environment and meets the requirements of multi-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04L27/26
CPCH04L9/001H04L27/2614
Inventor 杨华庞子扬夏磊李姝徐思远
Owner NANJING UNIV OF POSTS & TELECOMM
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