Recently , much interest of the coding community has focused around a new family of error - correcting codes , called turbo codes , whose perfor - mances in terms of bit error rate ( ber ) are close to the shannon limit Turbo碼作為一種新型的糾錯(cuò)編碼類型備受通信界的注目,它的糾錯(cuò)能力能夠接近shannon極限。 turbo碼自1993年由c
This system can alarm by telephone or speaker , it also can alarm through telephone and speaker one by one . the user can be able to stop alarming through the correct code inputed by the keyboard 該系統(tǒng)可由用戶通過鍵盤預(yù)先設(shè)置語音、揚(yáng)聲器、先語音后揚(yáng)聲器三種方式報(bào)警,而任意一種報(bào)警過程均可以由用戶通過鍵盤輸入密碼加以終止。
Both quantum error correcting code and quantum error avoiding code are practical quantum channel coding schemes . we present in this dissertation a new quantum error correcting code scheme , named serially concatenated quantum convolutional code 克服量子信道噪聲的編碼就稱為量子信道編碼,實(shí)用的量子信道編碼包括量子糾錯(cuò)碼和量子避錯(cuò)碼。
This problem arises from the circuit layout of vlsi designs , interconnection networks , sparse matrix computations , error - correcting code designs , data structures , biology , etc , which has extensive backgrounds 圖的嵌入問題是從稀疏矩陣的計(jì)算、數(shù)據(jù)結(jié)構(gòu)、 vlsi電子線路設(shè)計(jì)和分子生物學(xué)等問題中提取出來的數(shù)學(xué)模型,有著廣泛的應(yīng)用背景。
In the second part , we discuss the problem encountered while transferring dsss signal in fh system , and finally a " fh + long error - correcting code " communication solution based on bpsk modulation is presented 在第二部分中,我們討論了將直擴(kuò)應(yīng)用于跳頻系統(tǒng)所出現(xiàn)的問題,提出了具有良好抗干擾能力的bpsk調(diào)制的“跳頻+長糾錯(cuò)碼”通信的方案。
Therefore , software radio has greatly mobility and opening . being of these characterics , it has become one of the focuses of communication research at present . in this paper , error - correcting codes of software radio is discussed 本文將對(duì)軟件無線電的糾錯(cuò)碼部分加以敘述,提出了在vhf uhf軟件無線電接收發(fā)送樣機(jī)中的糾錯(cuò)碼方案及其具體的實(shí)現(xiàn)方法。
Meanwhile , a looking - up database method used for yielding pdf47 error correcting codes has been developed , which makes it easier and more accurate to compute the coefficients of the generating polynomial and results of syndrome polynomials 同時(shí)提出一種適用于pdf417糾錯(cuò)編碼和譯碼的查表方法,可以簡單確定任意碼字在gf ( 929 )內(nèi)所對(duì)應(yīng)的本原元的冪次。
Based on the interlace and concatenation , a new class of error - correcting codes over two - dimension , rs - complex rotary codes , is proposed . rs codes with a great error - correcting ability is the main structure of the new codes 本文在這兩種思想的基礎(chǔ)上,選擇了糾錯(cuò)能力較強(qiáng)的rs碼和校驗(yàn)元數(shù)目可調(diào)的復(fù)轉(zhuǎn)碼,設(shè)計(jì)構(gòu)造了一種新型的二維糾錯(cuò)碼? ? rs -復(fù)轉(zhuǎn)碼。