Knowledge

Since 802.11n, MIMO technology has been used in this protocol and has significantly improved the wireless transmission rate. Specifically, how to achieve high technology improvement. Now let’s take a closer look at MIMO technology. With the progress of wireless communication technology, mor...

There are many types of switches on the market, but there are also different functional differences, and the main features are different. It can be divided according to the broad sense and scale of application:  1) First of all, in a broad sense, network switches can be divided into two categorie...

Principle: The principle of the Direct Sequence Spread Spectrum system is very simple. For example, a string of information to be sent is expanded to a very wide frequency band through PN code. At the receiving end, the information sent is retrieved by correlating the spread spectrum signal with ...

EVM: abbreviation of Error Vector Magnitude, which means error vector amplitude. The digital signal frequency band transmission is to modulate the baseband signal at the sending end, send it to the line for transmission, and then demodulate it at the receiving end to recover the original baseband...

Working principle: After any node of the switch receives the data transmission command, it quickly searches the address table stored in the memory to confirm the connection location of the network card with the MAC address and then transmits the data to the node. If the corresponding location is ...

Various third-party optical modules on the market have great advantages in cost compared with the original optical modules, which can effectively solve the problem of the high deployment cost of optical modules. However, some people still worry about the quality of compatible optical modules. HDV...