通信工程师 - 中级 - 综合能力

为你找到 1381 个题目。

科技职业道德的特征不包括（）

A. 具有为科技发展的想象品质

B. 具有为科技进步的创新气质

C. 为真理牺牲的坚强意志

D. 为真理牺牲的崇高品质

4G, short for fourth generation, is the fourth generation of mobile telecommunications technology, succeeding 3G. A 4G system must provide capabilities defined by ITU in IMT Advanced. Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, 3D television, and cloud computing.
Two 4G candidate systems are commercially deployed: the Mobile WiMAX standard (first used in South Korea in 2007), and the first-release Long Term Evolution (LTE) standard (in Oslo, Norway, and Stockholm, Sweden since 2009). It has however been debated if these first-release versions should be considered to be 4G or not, as discussed in the technical definition section below.
In March 2008, the International Telecommunications Union-Radio communications sector (ITU-R) specified a set of requirements for 4G standards, named the International Mobile Telecommunications Advanced (IMT-Advanced) specification, setting peak speed requirements for 4G service at 100 megabits per second (Mbit/s) for high mobility communication (such as from trains and cars) and 1 gigabit per second (Gbit/s) for low mobility communication (such as pedestrians and stationary users). Since the first-release versions of Mobile WiMAX and LTE support much less than 1 Gbit/s peak bit rate, they are not fully IMT-Advanced compliant, but are often branded 4G by service providers.
Based on the paragraph above,we know that there are (98) sorts of 4G standard.The highest speed of 4G is （99）Mb/s. It’s （100） that these first-release versions is branded as the true 4G.

（100）空应该选择？

A. controversial

B. undoubted

C. confusing

D. wrong

在信道编码中，监督码元添加在（）的信息码元序列中，进行差错控制。

A. 发送端

B. 编码器

C. 接收端

D. 译码器

制定因特网的正式标准不需要经过（）阶段。

A. 因特网草案

B. 征集标准

C. 草案标准

D. 建议标准

STM-4的帧结构中信息净负荷区域占（）行，（）列。

A. 4； 261

B. 9； 261

C. 9； 261×4

D. 9； 270×4

PON系统采用WDM技术，实现（）传输。

A. 单纤单向

B. 单纤双向

C. 双纤单向

D. 双纤双向

按照功能结构可以把信息基础设施分成三类，（）是第一类信息基础设施。

A. 计算机系统

B. 计算机网络

C. 电信网络

D. 电信系统

软件是计算机执行某种操作任务的程序集合，包括系统软件和应用软件，（）属于应用软件。

A. Harmony OS

B. Linux

C. Microsoft Office

D. Windows NT

蜂窝移动通信的组网方式是（）。

A. 大区制，有多个基站

B. 大区制，有一个基站

C. 小区制，每个小区设置多个基站

D. 小区制，每个小区设置一个基站

（）用于传送存储器单元地址或输入/输出接口地址信息。

A. 数据总线

B. 地址总线

C. 控制总线

D. 数据加工

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