基于半導(dǎo)體環(huán)形激光器的混沌保密光通信的理論研究
發(fā)布時間：2019-06-29 22:53
【摘要】：在當(dāng)前軟件加密通信技術(shù)保密性能岌岌可危,量子光通信技術(shù)還遠(yuǎn)未成熟的情況下,消費者迫切需要新的保密通信技術(shù)來滿足信息化時代日益增長的保密需求,混沌光通信以其高保密性、高帶寬和低成本等一系列優(yōu)點引起科研工作者的關(guān)注。半導(dǎo)體環(huán)形激光器天生具有豐富的動力學(xué)特性,體積小,功耗低,便于集成,是集成光通信光源的理想選擇。本文結(jié)合半導(dǎo)體環(huán)形激光器的優(yōu)勢于混沌保密光通信中,試圖建立一套基于半導(dǎo)體環(huán)形激光器的混沌保密光通信系統(tǒng),并從數(shù)值仿真角度出發(fā),實現(xiàn)該系統(tǒng)的混沌光通信,并探究Langevin噪聲對混沌通信系統(tǒng)的影響。基于上述目的,本文主要做了以下幾個方面的研究工作:成功搭建基于半導(dǎo)體環(huán)形激光器的混沌保密光通信系統(tǒng)模型是本課題能夠開題的關(guān)鍵前提,系統(tǒng)選用混沌掩蔽編碼技術(shù),通過一般同步,利用Q值評價通信質(zhì)量及保密性能。在保證良好的通信質(zhì)量以及保密性能的前提下,調(diào)制深度固定為4%時的最大通信速率為2.38Gbps。本文研究了Manchester碼調(diào)制下的混沌保密光通信系統(tǒng)的工作情況,發(fā)現(xiàn)相對于普通的NRZ碼調(diào)制,Manchester碼調(diào)制的混沌光通信系統(tǒng)具有更優(yōu)異的通信質(zhì)量和保密性能,另外,考慮到Manchester碼具有NRZ碼無法比擬的優(yōu)勢,如無直流波,用上升沿、下降沿表示二進制碼,定時信號容易獲取,充分利用混沌波高帶寬的特性以增強保密性等優(yōu)秀性能,本文得出結(jié)論:Manchester碼更適合于混沌保密光通信系統(tǒng)。本文的另一個研究點為Langevin噪聲對混沌保密通信系統(tǒng)的影響,出于數(shù)值仿真的目的,需要合適的數(shù)值算法來解帶噪聲的通信系統(tǒng)模型,通過選擇比較,文章在Heun算法的基礎(chǔ)上,利用三次Hermite插值算法獲取延時項,得到此系統(tǒng)的解。本文分別探究Langevin噪聲對帶反饋結(jié)構(gòu)的環(huán)形激光器的混沌輸出、混沌同步以及混沌通信的影響,文章發(fā)現(xiàn)Langevin噪聲會影響激光器的輸出,混沌波在某種程度上趨于隨機噪聲變化且混沌吸引子會變得不光滑,如果逐漸放大噪聲項,這種變化會越來越明顯;由于混沌通信系統(tǒng)采用一般同步,同步注入鎖定效應(yīng)使得Langevin噪聲無法對混沌同步施加影響;由于Langevin噪聲相對于信息信號具有可比性,因此能夠在不影響同步性能的前提下降低混沌光通信的通信質(zhì)量。
[Abstract]:At present, the security performance of software encryption communication technology is in jeopardy, and quantum optical communication technology is far from mature. Consumers urgently need new secure communication technology to meet the growing confidentiality demand in the information age. Chaotic optical communication has attracted the attention of researchers because of its high confidentiality, high bandwidth and low cost. Semiconductor ring laser is an ideal choice for integrated optical communication light source because of its rich dynamic characteristics, small size, low power consumption and easy integration. Based on the advantages of semiconductor ring laser in chaotic secure optical communication, this paper attempts to establish a chaotic secure optical communication system based on semiconductor ring laser. From the point of view of numerical simulation, the chaotic optical communication of the system is realized, and the influence of Langevin noise on chaotic communication system is discussed. For the above purposes, this paper mainly does the following research work: the successful construction of chaotic secure optical communication system model based on semiconductor ring laser is the key premise of this topic, the system selects chaotic masking coding technology, through general synchronization, using Q value to evaluate communication quality and confidentiality performance. On the premise of ensuring good communication quality and security performance, the maximum communication rate is 2.38 Gbps when the modulation depth is fixed at 4%. In this paper, the working situation of chaotic secure optical communication system under NRZ code modulation is studied. It is found that compared with ordinary NRZ code modulation, Manchester code modulation chaotic optical communication system has better communication quality and security performance. In addition, considering that Manchester code has incomparable advantages over code, such as no DC wave, rising edge and descending edge to represent binary code, timing signal is easy to obtain. Making full use of the characteristics of chaotic wave high bandwidth to enhance confidentiality and other excellent performance, this paper draws the conclusion that Manchester code is more suitable for chaotic secure optical communication system. Another research point of this paper is the influence of Langevin noise on chaotic secure communication system. For the purpose of numerical simulation, appropriate numerical algorithm is needed to solve the communication system model with noise. through selection and comparison, the delay term is obtained by using cubic Hermite interpolation algorithm on the basis of Heun algorithm, and the solution of the system is obtained. In this paper, the effects of Langevin noise on chaotic output, chaotic synchronization and chaotic communication of ring laser with feedback structure are investigated respectively. it is found that Langevin noise will affect the output of laser. To some extent, chaotic wave tends to change random noise and chaotic attractor will become unsmooth. if the noise term is magnified gradually, the change will be more and more obvious. Because the chaotic communication system adopts general synchronization, the synchronization injection locking effect makes the Langevin noise unable to influence the chaotic synchronization, and because the Langevin noise is comparable to the information signal, the communication quality of chaotic optical communication can be reduced without affecting the synchronization performance.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN918;O415.5
本文編號：2508186
[Abstract]:At present, the security performance of software encryption communication technology is in jeopardy, and quantum optical communication technology is far from mature. Consumers urgently need new secure communication technology to meet the growing confidentiality demand in the information age. Chaotic optical communication has attracted the attention of researchers because of its high confidentiality, high bandwidth and low cost. Semiconductor ring laser is an ideal choice for integrated optical communication light source because of its rich dynamic characteristics, small size, low power consumption and easy integration. Based on the advantages of semiconductor ring laser in chaotic secure optical communication, this paper attempts to establish a chaotic secure optical communication system based on semiconductor ring laser. From the point of view of numerical simulation, the chaotic optical communication of the system is realized, and the influence of Langevin noise on chaotic communication system is discussed. For the above purposes, this paper mainly does the following research work: the successful construction of chaotic secure optical communication system model based on semiconductor ring laser is the key premise of this topic, the system selects chaotic masking coding technology, through general synchronization, using Q value to evaluate communication quality and confidentiality performance. On the premise of ensuring good communication quality and security performance, the maximum communication rate is 2.38 Gbps when the modulation depth is fixed at 4%. In this paper, the working situation of chaotic secure optical communication system under NRZ code modulation is studied. It is found that compared with ordinary NRZ code modulation, Manchester code modulation chaotic optical communication system has better communication quality and security performance. In addition, considering that Manchester code has incomparable advantages over code, such as no DC wave, rising edge and descending edge to represent binary code, timing signal is easy to obtain. Making full use of the characteristics of chaotic wave high bandwidth to enhance confidentiality and other excellent performance, this paper draws the conclusion that Manchester code is more suitable for chaotic secure optical communication system. Another research point of this paper is the influence of Langevin noise on chaotic secure communication system. For the purpose of numerical simulation, appropriate numerical algorithm is needed to solve the communication system model with noise. through selection and comparison, the delay term is obtained by using cubic Hermite interpolation algorithm on the basis of Heun algorithm, and the solution of the system is obtained. In this paper, the effects of Langevin noise on chaotic output, chaotic synchronization and chaotic communication of ring laser with feedback structure are investigated respectively. it is found that Langevin noise will affect the output of laser. To some extent, chaotic wave tends to change random noise and chaotic attractor will become unsmooth. if the noise term is magnified gradually, the change will be more and more obvious. Because the chaotic communication system adopts general synchronization, the synchronization injection locking effect makes the Langevin noise unable to influence the chaotic synchronization, and because the Langevin noise is comparable to the information signal, the communication quality of chaotic optical communication can be reduced without affecting the synchronization performance.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN918;O415.5
【參考文獻】
相關(guān)碩士學(xué)位論文 前1條
1 張鑫;基于半導(dǎo)體環(huán)形激光器的混沌光通信系統(tǒng)關(guān)鍵技術(shù)的研究[D];電子科技大學(xué);2013年
，本文編號：2508186
本文鏈接：http://sikaile.net/kejilunwen/wltx/2508186.html
最近更新
教材專著
