Communication method combining chaos and MIMO

A communication method and combined technology, applied in the field of new MIMO-FM-SSCDSK security communication, can solve the problems of weak system security performance, high CDSK bit error rate, CDSK overall performance is not as good as DCSK, etc., to achieve strong security performance, Overcome the effect of high bit error rate and good robustness

Active Publication Date: 2015-03-11
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

FM-CDSK (with figure 2 ) While the system structure is simplified, the retransmission of the signal is also reduced, so that the code rate is improved compared with FM-DCSK, and it overcomes the shortcomings of the previous DCSK scheme that the signal cannot be transmitted continuously and the transmission efficiency is low , but due to the high bit error rate of CDSK, the overall performance of CDSK is not as good as that of DCSK, and the security performance of the system is not strong

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  • Communication method combining chaos and MIMO
  • Communication method combining chaos and MIMO
  • Communication method combining chaos and MIMO

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[0020] In the scheme of the present invention, multi-terminal input and multi-terminal output are combined with FM Segment Shift Correlated Delay Keying, multiple channels are used in parallel at the modulation end and demodulation end, and the signals sent by the two channels at the modulation end interact , so that the carried information is received on two channels, and the demodulator can accurately obtain the transmitted information only when it has to obtain the information of the two channels. The modulation end converts the input information signal into multiple signals through a serial-to-parallel converter, and acts on different chaotic signals respectively. A segmented cyclic shifter at the modulation end replaces the original multiplier, and the segmented cyclic shifter converts the channel-delayed sequence X i-L (or Y j-L ) is equally divided into M signal segments (delay sequence ), the sent information code m i Output information symbol a after serial-to-p...

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Abstract

The invention relates to a communication method combining chaos and MIMO (Multiple Input Multiple Output) and belongs to the technical field of communication. According to the method, for the defects of low transmission rate, high error rate and low confidentiality of a correlation delay shift keying (CDSK) chaotic communication scheme, a frequency modulated signal is dispersed in multiple channels for transmission, a delayed signal is equally divided into M sections by a segmentation cyclic shifter, and the M signal sections are cyclically shifted right for n sections according to information code elements and added into an original chaotic signal to form an output signal. Therefore, the confidentiality is remarkably improved and the information transmission rate is remarkably increased in comparison with an FM-CDSK scheme; under the same error rate, the signal-noise ratio is greatly improved in comparison with the FM-CDSK scheme; an improved chaotic confidential communication system adopting the method has wide application prospects in the fields of images, military confidential information and the like.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a communication method combining chaos and MIMO, in particular to a novel MIMO-FM-SSCDSK secret communication method based on improved FM-CDSK. Background technique [0002] The basic characteristics of a chaotic system are its aperiodicity, sensitivity to initial values, good autocorrelation characteristics, and internal randomness of chaotic signals, which determine the possibility of applying chaotic signals to the field of communication, and chaotic The unique properties of the signal make the chaotic signal more widely used in secure communication. According to the current international and domestic research level, chaos communication is mainly divided into four categories: chaos keying; chaos spread spectrum; chaos parameter modulation; chaos cover. Among these four types of chaotic communication systems, chaotic keying occupies a pivotal position, has broad developmen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00H04B7/04
Inventor 张刚李泽金张天骐贺利芳崔妮婷胡韬
Owner CHONGQING UNIV OF POSTS & TELECOMM
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