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  • 更新日期: 2022-04-28
  • 浏览次数: 4710
从包含范围,通信波形,狭义的定义是指无线通信空口波形,广义上可以是通信协议。但一般偏重基带物理层。 从应用时代上,通信波形,是模拟通信的遗产。 从应用范围看,目前多用在特殊应用行业的称呼,其实也是应用时代的继承性名词。 从不同维度,通信波形是指信号处理的时域、频域、能量域的具体表现,而通信协议还包含信……
  • 更新日期: 2022-04-14
  • 浏览次数: 3154
摘要: 在上次关于阵列天线赋形波束综合推文——阵列天线的赋形波束综合(一)中,对傅里叶级数法进行简单的公式阐述和CST实例验证。本次推文则献上伍德沃德—劳森抽样法实例。 本文使用的软件为CST 2018和MATLAB 2019A ……
  • 更新日期: 2022-04-07
  • 浏览次数: 3125
今天的消费者已经很快地对采用 USB-C 或 USB-Type C 通信接口标准的移动设备变得依赖—— 从智能手机和平板电脑到可穿戴设备和笔记本电脑。USB端口还兼作大多数此类设备的快速充电端口。 因此,设计针对静电放电 (ESD) 和过热条件的强大保护从未像现在这样重要。 USB-Implementer……
  • 更新日期: 2022-03-26
  • 浏览次数: 2701
项目背景: 2019年中国60岁以上老年人口2.5亿,占比18%,预计到2027年老年人口占比将提升到20%,进入深度老龄化社会。 ……
  • 更新日期: 2022-03-04
  • 浏览次数: 3616
一、范围 本规范规定了电动汽车高压线束设计过程中涉及到的符号、代号、术语及其定义,设计准则,布置要求,结构设计要求,材料选用要求,性能设计要求,设计计算方法,安全使用要求等。 二、规范性引用文件 下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅所注日期的版本适用于本文件。凡是不注……
  • 更新日期: 2022-02-21
  • 浏览次数: 2835
一、项目背景 ……
  • 更新日期: 2021-12-30
  • 浏览次数: 2586
"The application of Beidou is only limited by imagination", which is the prediction of people in the industry at the initial stage of China's Beid……
  • 更新日期: 2021-12-29
  • 浏览次数: 4729
Telematics box, referred to as automobile T-box for short. The Internet of vehicles system consists of four parts: host, automobile T-box, mobile app and background system. The host is mainly used for audio-visual entertainment and vehicle informat
  • 更新日期: 2021-12-29
  • 浏览次数: 3593
Today we will continue to learn about RF system architecture. When designing transceivers for wireless communication systems, we may consider many factors, such as performance, cost, energy consumption, weight and volume. For example, in the current 5g AA
  • 更新日期: 2021-12-29
  • 浏览次数: 2802
On November 1, 2021, the national standard of safety requirements for electric vehicle power exchange was officially implemented, which is the first basic universal national industry standard formulated by China's automobile manufacturing industry in
  • 更新日期: 2021-12-29
  • 浏览次数: 3124
PI film has excellent performance and wide downstream application fields. The products of polyimide include film, foam, fiber, photosensitive polyimide and polyimide based composites. PI films account for more than 70%, which is the most important product
  • 更新日期: 2021-12-29
  • 浏览次数: 2841
Choosing the right connector for an application is critical not only to providing reliability and other performance, but also to connecting IOT sensors and optimizing nodes. Internet of things experts believe that this technology can give full play
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