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码作为一种新型的纠错编码类型备受通信界的注目,它的纠错能力能够接近shannon极限。 turbo码自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 该系统可由用户通过键盘预先设置语音、扬声器、先语音后扬声器三种方式报警,而任意一种报警过程均可以由用户通过键盘输入密码加以终止。
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 克服量子信道噪声的编码就称为量子信道编码,实用的量子信道编码包括量子纠错码和量子避错码。
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 图的嵌入问题是从稀疏矩阵的计算、数据结构、 vlsi电子线路设计和分子生物学等问题中提取出来的数学模型,有着广泛的应用背景。
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,我们讨论了将直扩应用于跳频系统所出现的问题,提出了具有良好抗干扰能力的bpsk调制的“跳频+长纠错码”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 本文将对软件无线电的纠错码部分加以叙述,提出了在vhf uhf软件无线电接收发送样机中的纠错码方案及其具体的实现方法。
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 同时提出一种适用于pdf417纠错编码和译码的查表方法,可以简单确定任意码字在gf ( 929 )内所对应的本原元的幂次。
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 本文在这两种思想的基础上,选择了纠错能力较强的rs码和校验元数目可调的复转码,设计构造了一种新型的二维纠错码? ? rs -复转码。