前缀

With cyclic prefix, the channel matrix exhibits block circulant property which is exploited to blindly identify periodically modulated block transmission system in an existing method.

一种针对具有循环前缀和周期调制的块传输系统的盲辨识方法，利用了信道矩阵的块循环特性来求解信道系数。

Exist 名词形式 existence 搭配:come into existence being 出现,产生 SIST ★1995 Text 1It serves directly to assist a rapid distribution of goods at reasonable price.

它的直接作用就是以合理的价格，帮助快速分配货物。 distribute 词根 trbute 含义为：贡献，贡物，dis-作前缀，表示分开，记忆：把贡献，把贡物分开，释义：v。

These prefixes may sometimes be common to multiple packages.

这个前缀可能在多个包中保持一致。示例

With two transmit antennas, based on lower bound for LS channel estimation, it is shown that the periodic complementary set is optimal over frequency-selective fading channels.

针对基于循环前缀的单载波系统，提出了联合Alamouti-like STBC和最小均方信道估计方案。

A prefix is often added, providing information as to the nature of the spore, for example conidiospores arise on a conidium, megaspores and microspores are the larger and smaller spores produced by heterosporous plants, etc.

此词前常有前缀修饰，用以提供含孢子特征的信息。例如 conidiospores 源于分生孢子， megaspores 和 microspores 是大孢子和小孢子，由具异型孢子体的植物体产生。

It is, no doubt, with this design that the two letters, which otherwise have no connexion with the book, were prefixed to it.

这是毫无疑问，这个设计，这两个字母，否则没有任何联接的书，它是前缀。

Next to the flag is the appropriate country name, accompanied by its latitude and longitude, CQ Zone number and call sign prefix.

旁边的国旗是适当的国家的名字，伴随著它的经度和纬度，重庆开发区的数量和呼号前缀。

CQ W1,especially looking for Vermont for my WAS,this is BY1PK calling CQ and standing by.

BY1PK呼叫前缀为W1的电台，特别是佛蒙特州的电台，因为我希望获得WAS奖，请回答。

the paper introduces long curtate new unequal ofdm system.adopts long curtate unequal benefit to be not to require that the second order adding the circulation prefix,being therefore likely to lead into period stationarity,making use of signal therefore in launching an array,counting characteristic property realizing blind estimation of route.this technology includes three kinds of method : subspace decomposition,correlation matching,and maximum likeewise,monte carlo simulation show that whentheeb/no is low,function is better than the other kinds of method.

摘 要：提出一种采用不等长分组新的ofdm系统。采用不等长分组的好处是不需要加循环前缀就能在发射序列中引入周期平稳性，因此，可利用信号的二阶统计特性实现信道盲估计。信道盲估计主要分子空间分解、相关拟合和最大似然三种方法。结合monte carlo仿真表明，在信噪比较低时，结合子空间分解方法计算出的误码性能比其余两种方法好。

Firstly expound the structure of the OFDM system, then analysis the working principle of OFDM communication and research into the key technologies in OFDM system: string conversion, sub-carrier modulation and demodulation, inverse Discrete Fourier Transformation, Discrete Fourier Transformation, cyclic prefix Insert, etc.

该文首先阐述了OFDM系统的结构，分析了OFDM通信系统的工作原理，研究了OFDM系统实现过程中串并转换、子载波调制解调、离散逆傅里叶变换、离散傅里叶变换、循环前缀插入等关键技术。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。