Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Confidentiality of communications and communications security

Chaotic Signal and Its Applications in Communications

Author YangXianHao
Tutor FengJiuChao
School South China University of Technology
Course Information processing
Keywords Chaotic signals Chaotic communications Non-coherent detection DP algorithm Symbol error
Type Master's thesis
Year 2010
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Chaos is an emerging science , because of its sensitivity to initial conditions , the behavior of seemingly random , continuous broadband power spectrum and other features , it has many potential applications , the chaos has become a hot topic . Chaotic communication is one of the many promising applications . Chaotic communication system can be divided into two categories : coherent communication and non - coherent communication . Coherent communication in bandwidth utilization , data transmission rate , the noise performance and confidentiality are superior to non - coherent communication , so a non - coherent communication theoretically performance as coherent communication . However , because it does not require a chaotic signal synchronization, no generated in the receiving end and transmitting end of chaotic reference signal , it is only non-coherent detection technique based on the correlation integrator , by chaotic mapping the statistical characteristics inherent to the judgment signal , the circuit simple , easy to implement, so to give priority to the poor transmission conditions . Firstly, a preliminary discussion of chaos theory , and then introduced a basic chaotic coherent communication technology : Chaos keying (Chaos Shift Keying) and several non - coherent detection techniques for chaotic incoherent communication : maximum likelihood method duplicate France , Dynamical Programming (DP) algorithm , and wherein the DP algorithm performance is discussed in detail . On this basis , according to the characteristics of the DP algorithm proposed an inhibitory symbol error method and apply it to the chaotic multi- user communication .

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