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Differential chaos shift keying communication method based on hybrid system

A differential chaotic keying and hybrid system technology, applied in the field of spread spectrum communication, can solve problems such as amplitude attenuation, reliability of underwater acoustic communication, multipath interference, time-varying characteristics and environmental noise constraints

Inactive Publication Date: 2016-04-20
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of differential chaos keying communication method based on hybrid system, solves the reliability of underwater acoustic communication in the prior art and is subjected to problems such as multipath interference, amplitude attenuation, time-varying characteristics and environment in the underwater channel Noise restrictions have seriously affected the promotion and utilization of underwater acoustic communications

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  • Differential chaos shift keying communication method based on hybrid system
  • Differential chaos shift keying communication method based on hybrid system
  • Differential chaos shift keying communication method based on hybrid system

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] refer to figure 1 , the working principle of the method of the present invention is that a binary symbol period is equally divided into two time periods, wherein each time period is equal to 1 / 2 of a symbol period, and the hybrid system is sent in the first time period to generate The chaotic signal, as the reference signal u of the transmitted symbol 1 ; Send the reference signal u in the second time period 1 Multiplied by the binary symbol b to be sent i , the digital signal B n ={b 1 ,b 2 ,...,b n}, get u 2 ; transmit signal u 3 =[u 1 ,u 2 ], that is, send u in the first time period 1 , send u in the second time period 2 ; When the modulated signal u sent 3 After passing through the channel, the received signal v obtained at the receiving end is sent to the chaotic matched filter for filtering, and the output signal ξ o...

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Abstract

The invention discloses a differential chaos shift keying communication method based on a hybrid system, which comprises the steps of: S1, setting communication system parameters; S2, preparing binary information to be sent, and presetting the binary information; S3, generating a chaos signal u1; S4, preparing a transmitting signal u3; S5, carrying out chaos matching filtering on a receiving signal; and S6, judging a polarity of a code element, respectively carrying out related operations on two segments of signals, and until decoding to obtain a recovered signal, completing communication. According to the method disclosed by the invention, a system structure is effectively simplified on the basis of ensuring reliability of a communication system, and the method is easy for implementation and integration of a microprocessor; the method can normally work at a low signal-to-noise ratio, so that reliability of the communication system is improved; and the transmission signal adapts to a channel bandwidth, and resistance to narrow-band interference is low.

Description

technical field [0001] The invention belongs to the technical field of spread spectrum communication, and relates to a differential chaos keying communication method based on a hybrid system. Background technique [0002] Underwater communication has a vital impact in the fields of ocean exploration, ocean monitoring, development, and national defense. The underwater communication network provides different users with the information transmission and communication required for detection, remote control, and security assurance, and can also serve for marine environmental pollution. And geological disaster forecasting, to achieve large-scale unmanned monitoring; in addition, the use of underwater communications in the military field can establish an anti-reconnaissance and early warning network system. However, the propagation of light waves and electromagnetic waves in sea water is greatly attenuated, which cannot be used for information transmission over medium distances, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02H04B1/7097
CPCH04B1/7097H04B13/02H04B1/69
Inventor 任海鹏白超杨勇
Owner XIAN UNIV OF TECH
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