码

Novel decoding algorithms of layered space-time code are proposed, which are based on Greville recursive operations and include three sub-optimal schemes.

在对垂直分层空时码的研究中，本文首次提出全新的译码算法—基于Greville递归分层空时码译码算法，并详细地给出了其三种次优方案。

Rushanan(1991) generalized them to duadic abelian codes and Zhu(1996) further generalized them to duadic group algebra codes.

它是由Leon等人(1984)作为二元域上二次剩余码的推广而提出的；Rushanan(1991)把它推广到duadic阿贝尔码；朱烈(1996)进一步推广到duadic群代数码。

Because Conference matrices and Hadamard matrices are related to Paley matrices,in this paper we define the normalized Conference matrices and generalized normalized Hadamard matrices,and we show some special properties of them. Also we constructed a doubly even self-orthogonal code from normalized Conference matrix and a doubly even self-dual code from generalized normalized Hadamard matrix.

由于Conference矩阵，Hadamard矩阵与Paley矩阵紧密相联，本文定义了正规Confersnce矩阵和正规Hadamard矩阵，讨论了他们的一些特性，并且利用正规Conference矩阵构造了一个自正交的双偶码刷用正规Hadamard矩阵构造了一种自对偶的双偶码。

A new one dimensional optical orthogonal codes(1 D OOC) named extended hyperbolic line congruence codes is constructed,and its performance is analyzed.

构造了一种扩展的双曲线性同余码并分析了其码字性能。

Optical orthogonal codes; Optical code division multiple access; Prime sequences ; Hyperbolic line congruence code

光码分多址；二维光正交码；素数码；双曲线性同余码

One construction of Cartesian authentication codes from the normalform of Idempotent matrices over the field Fq is presented.

本文利用有限域上幂等阵的相似标准形，构造了一个Cartesian认证码，并计算出该码的所有参数。

Provides an alternative value for the aspect of the markup in question—an alternative generic identifier, transcription, or attribute value, or the identifier of an anchor element (to indicate an alternative starting or ending location).

提供一个替代属性值给指定标记部分—一个替代的类目识别符码、转录、或属性值，或是元素anchor (用来指出一个替代的开始或结束位置)的识别符码。

A code C can be constructed from a Paley matrix of order n,where n is a power of odd prime. The code contains codewords 0 =(0,0,......,0),1 =(1, 1,....., 1) and the rows of/2 and (-5 /-- J)/2, where I and J are respectively identity matrix and the matrix with all entries equal to one.

从凡阶＊缸矩阵S出发，可以构造一个码氏它含有码字0＝叮0；…；0X1二O；1，…；1）以及矩阵（S＋I＋刀／2和（一S＋I＋刀／2的全部行向量，其中凡是奇素数的方幂；了和J分别是单位矩阵和全1矩阵。

To resist multipath and ISI in acoustical communication, a single filter receiving method and a new method, namely preprocessing frequency hopping filtering method, were adopted simultaneously. A controlled preprocessing frequency hopping filter was added before mixing frequencies of signal receiving system to strengthen resistance against multipath and ISI. The method was simulated respectively on two frequency hopping sequences of PN code and increasing sequence.

除了采用以往的单一滤波接收处理方法，本文还采用了一种新的接收处理方法，即前置跳频滤波接收处理方法，与其他方法不同的是在信号接收系统的混频之前增加了可控的前置跳频滤波器，可以增强抗多途和码间串扰能力，并对此方法分别采用PN码和递增序列2种跳频序列进行仿真研究。

This article mainly discussed the design method of Infrared Remote Controller based on RC5 code ,which is used for multi-function Whirlpool.It described the principal of RC5 code,and it emphasized the hardware and software realization of Infrared Remote Controller.A detailed analysis about the time management of software process is given,and finally designed the step of electricity-saving.

本文描述了一种多功能浴缸用的基于RC5码的红外遥控器设计的方法，说明了RC5码的组成原理，主要突出了红外遥控器的硬件与软件设计及实现，同时详细分析了软件处理过程中关于时序处理的内容，并设计了遥控器电路的省电措施。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。