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Shanghai is the place with the largest number of plug-in hybrid vehicles in China. The four typical categories highlighted in the "2019 Shanghai New Energy Vehicle Big Data Research Report" are perso...[Details]
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在CDMA系统中分配给各个用户的扩频码如果没有严格正交,将会引起用户之间的相互干扰,即多址干扰。随着用户数的增多,多址干扰的增强,用户的误码性能会变差。另一方面,移动用户的位置不断变化及深度衰落的存在,强功率用户的信号会抑制弱功率用户的信号,系统性能严重弱化,即所谓的远近效应,因此抑制MAI和远近效应以提高系统的性能,增加容量是十分迫切的要求,而多用户检测技术成为近年来的主要解决方法之一。
多...[Details]
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Abstract: An improved passive filter device
based on
DSP
is proposed
.
The L and C values of the LC filter main circuit are designed to be adjustable in stages, and a harmonic measureme...[Details]
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The traditional in-vehicle CAN bus supports a maximum transmission rate of 500 kbit/s, and each frame can only carry 8 bytes of data. Due to the limitations of transmission rate and data length, in...[Details]
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Previously, the program was downloaded directly to the DDR memory, and then jumped directly to the memory to run. The reason why it can run is that the u-boot that comes with the development board ha...[Details]
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Working principle of electronic transformer
The electronic transformer introduced below has an input of AC220V and an output of AC12V, and its power can reach 50W. It is mainly a transformer circui...[Details]
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Integrated circuit application circuit diagram functions Integrated circuit application circuit diagram has the following functions:
① It expresses the external circuit structure, component param...[Details]
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According to the People's Court Announcement Network, since the outbreak of the epidemic, that is, from January 22, 2020 to the present, more than 1,000 companies have issued bankruptcy announcements...[Details]
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Xining, December 18 (China News Service) (Luo Yunpeng, Jing Mingfa, Zhu Yiran) China State Grid Qinghai Electric Power Company announced on the 18th that the first transformer of China's first clea...[Details]
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The reception of FM radio has been a hot topic in recent years, especially last year. This is because FM radio has better sound quality, higher fidelity, stronger anti-interference, richer programs, a...[Details]
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1. Introduction
The automotive PEPS system is rapidly becoming one of the most representative solutions in vehicle wireless entry applications. The so-called PEPS is the abbreviation of Passi...[Details]
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During the Spring Festival holiday, which was shrouded in the epidemic, the whole society pressed the "pause button". Now, as the resumption time has been determined one after another, some cities ha...[Details]
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The 51 MCU has 5 interrupt sources: 1. INT0 - External interrupt 0, introduced by P3.2 port, caused by low level or falling edge. The default priority is the highest 2. INT1 - External interrupt ...[Details]
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Recently, it was reported that Apple's negotiations with CATL and BYD on battery supply for Apple's car-making project have stalled. It is understood that the fundamental reason is that the two Chine...[Details]
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On November 1, the Guangzhou Municipal Bureau of Industry and Information Technology issued the "Implementation Plan for Promoting the Construction of New Energy Storage Industrial Parks in Guangzh...[Details]