Code element: In digital communication, symbols with the same time interval are often used to represent a binary number. The signal in such a time interval is called (binary ) Symbols. And this interval is called the symbol length. It is worth noting that when there are more than 2 discrete states of the code element (for example, M is greater than 2), the code element is an M-ary code element at this time. (Baidu Encyclopedia)
It’s more official here, but it didn’t happen at once. In Xie Xiren’s book, there is an example, assuming that the baseband signal is 101011000110111010…If it is transmitted directly, the information carried by each symbol is 1bit (it can be understood as each binary Is a symbol), and the above signal is divided into 101 011 000 110 111 010, it is regarded as 6 symbols, each symbol is 3bit, 8 forms of expression, 2^3. This form of expression means The receiver must uniquely determine this symbol, and the official point is 8 different amplitudes or frequencies or phases. You can also divide it into 1010 1100 0110 1110 10. This is 5 code elements and 16 manifestations.
Summary: The code element is what you do To define the information you want to send, transmit multiple bits, or one symbol.
Baud rate, also known as symbol rate, refers to the transmission code per second The number of yuan, in baud (Band)
The bit rate is the number of bits transmitted per second.
As explained earlier, the size of the symbol can be defined by yourself. If the symbol size is defined as 1, the symbol rate ( Baud rate) = bit rate.
The relationship between baud rate and bit rate can be obtained from this
Baud rate = bit rate/number of bits per symbol. (Bit rate is also called data rate)
Example: Ethernet with a data rate of 10Mb/s is physically What is the symbol transmission rate on the media in symbols per second?
Manchester encoding is used on the Ethernet, which means that each bit has two Signal period, the baud rate is twice the data rate, 2*10 symbols per second.
The commonly used data transmission rate units are Kb/s, Mb/s, Gb/s, and the conversion relationship between them is : 1Kb/s=103b/s, 1Mb/s=106b/s, 1Gb/s=109b/s. ———————————————— Copyright statement: This article is the original article of the CSDN blogger “untilyouydc”, and it follows the CC 4.0 BY-SA copyright agreement. Please attach the original source for reprinting. Link and this statement. Original link: https://blog.csdn.net/qq_40774175/article/details/82953153