Optimal quaternary self - orthogonal codes of dimension three 4上的3維最優(yōu)自正交碼
Some new results of optimal optical orthogonal codes 光學(xué)正交碼的一類(lèi)新的結(jié)果
The construction of optical orthogonal codes using matlab 光正交碼的構(gòu)造
Design solution for construction of strictlyoptimized , k , 1 optical orthogonal codes 一種嚴(yán)格最佳, k , 1光正交碼的設(shè)計(jì)方法
Optical orthogonal code ( ooc ) among optical address code is mostly investigated , so the main research of this paper is focused on the construction of ooc 目前光地址碼中研究得比較多的是光正交碼,因此本文主要研究光正交碼的構(gòu)造。
The design principle is introduced and a solution , called cs code , is obtained by the use of two operations to the conventional orthogonal code set ; an operation of cyclic repetition and an operation of angle rotation 文章介紹了這種碼的設(shè)計(jì)準(zhǔn)則,并給出了一個(gè)具體的實(shí)例,稱(chēng)為梳狀頻譜cs碼。 cs碼利用傳統(tǒng)的正交碼通過(guò)2步操作得到: 1循環(huán)重復(fù)操作2角度旋轉(zhuǎn)操作。
( c ) propose the scheme to implementing the coder and deoder of optical time - spreading / frequency - hopping , by assigning two orthogonal codes for one user and using these two codes to encoding 1 and 0 respectively , differential detection can be adopted . not only improves system performances in ber , but also resists the interference such as mai , and does n ' t need any control devices to evaluate the optimum decisive threshold 通過(guò)給每個(gè)用戶指定互相關(guān)為0的兩個(gè)地址碼分別發(fā)送1和0信號(hào)以及在接收端采用差分檢測(cè)技術(shù),避免了ook (開(kāi)關(guān)鍵控)光通信系統(tǒng)中0不發(fā)送光脈沖和ook常規(guī)檢測(cè)方式下最佳判決門(mén)限必須根椐用戶數(shù)等外界環(huán)境而改變,從而提高了系統(tǒng)性能和降低了系統(tǒng)的復(fù)雜度。
Abstract : analyzes the performance of unipolar ocdma system using optical orthogonal code ( ooc ) considering the dispersion and nonlinearity effect of the transmission medium . theoretical analysis demonstrates that dispersion and nonlinearity effect deteriorate the system performance . the performance of ocdma system assuming dispersion - shifted fiber as transmission medium is very close to the case neglecting the dispersion and nonlinearity effect . assuming rz initial pulse and optical hard limiter are also possible solutions 文摘:分析了基于光正交碼( ooc )的光碼分多址系統(tǒng)的性能.數(shù)值結(jié)果表明:與以前忽略光纖信道對(duì)系統(tǒng)性能的情況相比,在考慮了光纖的色散和非線性效應(yīng)以后,系統(tǒng)性能有了明顯的下降.給出了一些建議方案來(lái)遏制由色散和非線性效應(yīng)引起的系統(tǒng)性能惡化