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Dual-mode multi-carrier differential chaotic shift keying modulation method and transmitter

A technology of shift keying and modulation method, applied in a variety of modulation transmitter/receiver arrangements, modulation carrier systems, multi-frequency code systems, etc., can solve problems such as peak-to-average power ratio, and achieve the effect of improving utilization

Active Publication Date: 2020-09-04
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, in the signal transmission of the subcarriers superimposed on each other, if the phases of the subcarrier signals are consistent at a certain moment, they will superimpose each other, resulting in a high peak-to-average power ratio

Method used

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  • Dual-mode multi-carrier differential chaotic shift keying modulation method and transmitter
  • Dual-mode multi-carrier differential chaotic shift keying modulation method and transmitter
  • Dual-mode multi-carrier differential chaotic shift keying modulation method and transmitter

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Embodiment Construction

[0040] 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.

[0041] 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 to verify the statement.

[0042] A dual-mode multi-carrier differential chaotic shift keying modulation method, comprising the following steps:

[0043] Step 1: Implementation conditions of the present invention: t...

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Abstract

The invention discloses a dual-mode multi-carrier differential chaotic shift keying modulation method and a transmitter. The transmitter comprises a subcarrier generator, a chaotic signal generator, anormalization processor, an S / P converter, an index selector, a polarity converter, a modulation multiplier, a carrier multiplier, an N-IFFT processor, a CI code encoder and a P / S converter. Index modulation is introduced, and meanwhile CI codes are introduced to expand signals. On the basis of improving the frequency band utilization rate of the system, the effect of reducing the peak-to-averageratio of the system is more obvious.

Description

technical field [0001] The invention relates to chaotic communication technology, which is a method for improving the frequency band utilization rate of MC-DCSK system based on index modulation and introducing CI code to reduce signal PAPR (peak-to-average power ratio). Background technique [0002] Chaotic signals have special properties such as sensitivity to initial conditions, aperiodicity, and special auto(mutual) correlation. The information transmitted by using chaotic signals as a carrier is more difficult to be intercepted by eavesdroppers, and the security of communication can be improved. Therefore, in recent years, chaotic signals It has received extensive attention in the fields of information security and communication. [0003] Along with the development of chaos applications, the chaotic digital modulation technology with aperiodic broadband chaotic signal as the carrier emerges at the historic moment. Chaotic digital modulation has similar advantages to oth...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/2614H04L27/2627H04L27/001H04L27/0008Y02D30/70
Inventor 杨华徐思远李姝徐晓飞
Owner NANJING UNIV OF POSTS & TELECOMM
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