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The network can be classified into LAN, LAN, MAN, and WAN. The specific meanings of these nouns are explained and compared below.  (1) Personal Area Network (PAN) Such networks can enable short-distance network communication between portable consumer appliances and communication devices, This cov...

RSSI is the abbreviation of Received Signal Strength Indication. The received signal strength characterization is calculated by comparing two values; that is, it can be used to determine how strong or weak the signal strength is compared with another signal.   The calculation formula of RSSI...

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...