外码

DDL中的外码定义

Foreign key definitions in the DDL

其基本思想是在关系数据库的基础上引入XML，利用XML来统一描述不同实体的属性集，从而将实体都抽象成（ID，外码集，属性集）的形式。

The basic idea is using XML based on the relational database to describe the property set of varied entity and abstracting the entity to the format of ( ID , foreign key set , property set ) .

DVB-T调制器外码编码器的FPGA设计

Outer Encoder of DVB - T Modulator Based on FPGA

由于在现代通信中，RS码作为外码成为标准的纠错编码单元，用途十分广泛。

In modern communication , RS code has turned into standard error correcting and coding unit as outer code , and become widely used .

709/975中建议的标准FEC，也可用作本文设计的级联纠错码的外码。

709 / 975 and also as outer codes of concatenated code designed in this work .

信号编码采用外码RS（Reed-Solomon），内码为TCM（TrellisCodedModulation）的级联纠错编码。

The cascade correcting code of outer RS ( Reed-Solomon ) code concatenated with inner TCM ( Trellis Coded Modulation ) code is adopted for signal coding .

汉字带联想的全拼输入法的外码到机内码的转换，可采用改进的一种可称之为类trie树的数据结构。

This paper presents a tree data structure so called trie like tree , used for Chinese character input with " full pinyin " method .

可以利用这一点将CPM就作为内码和作为外码的二进制卷积码（CC：ConvolutionalCode）串行级联以提高功率利用率，它们共同构了成一个编码调制在一起的系统。

To further improve the power efficiency , CPM as a inner code can be serially concatenated with the binary CC ( Convolutional Code ) as a outer code , which is a system both has the channel code and the modulation .

RS码具有优异的纠正突发错误的能力，它作为外码与Viterbi码交织级联可显著提高多媒体卫星通信的可靠性，目前国内外许多通信标准中都采用RS与Viterbi的级联码。

RS code has excellent capability in correcting bursting errors . RS code can remarkably improve the reliability in communications of multimedia satellite when it interleaves and concatenates with Viterbi as outer code . Now , many communication standards adopt the concatenated codes of RS and Viterbi .

差分跳频G函数内码采用改进的最大后验算法译码，大大简化了译码复杂度，改善了系统的误码性能，交织采用40×40块交织器，外码RS（15,9）采用BerlekampMassey译码算法。

In order to improve the error code rate performance , modified MAP algorithm is applied to the inner decoder of differential frequency hopping G function . ( 40 × 40 ) block weave encoder is used and the outer code is decoded by the Berlekamp Massey algorithm .

该码的内码采用递归系统卷积码，外码采用Tailbiting码。

For the concatenated codes , the systematic convolutional codes ( RSC ) are used as the inner code , while tailbiting ( TB ) is used as the outer code .

解码的复杂程度取决于外码格栅复杂程度。

The decoding complexity is mainly determined by the trellis complexity of the outer code .

利用双天线发送分集和单天线接收系统，其中将12Turbo码作为外码、简单的空时分组码作为内码。

We combined rate 1 / 2 Turbo code as outer code and a simple two-antenna space-time block code as inner code for transmitting diversity and one receiver antenna .

我们采用级联一个外码同时应用迭代软译码算法，以期进一步提高差分空时编码系统的纠错性能。

In this dissertation , we look forward to improve the performance of the differential space-time system by concatenating it with an outer code and using iterative soft-decision decoding algorithm .

柔性分类编码分为内码和外码两部分：外码对零件起着唯一标识的作用，由大类识别码、名称类别码和顺序码三部分组成；

The flexible classification codes is divided into internal code and external code : the external code functions as the only identification of product , it contends big class code , name code and order code ;

今年8月，该公司发布公告称，淘宝商家不得再发含有外链二维码的图片。

In August it announced that Taobao merchants would no longer be able to advertise QR codes , the digital bar codes , linked to external websites .