What is the symbol rate?

The symbol rate indicates the number of signal waveform transformations per unit time, that is, the number of symbols transmitted through the channel. If the signal symbol width is t seconds, the symbol rate B= 1/T, and the unit is called baud. This is to commemorate Bodo, the inventor of telegraph code, so the symbol rate is also called baud rate, or modulation rate, waveform rate and symbol rate.

Calculation method:

Symbol rate in baud. In binary digital transmission, a symbol can carry a bit, which has two state values.

Data rate is bit rate, and symbol rate is commonly known as baud rate. The conversion relationship between them is: bit rate = symbol rate Xlog2(N), where n stands for binary number.

The relationship between baud rate and bit rate is bit rate = baud rate × the number of binary digits corresponding to a single modulation state. In different signal modulation systems, each symbol carries different bits. For example, a symbol can carry one bit in binary digital transmission and three bits in octal digital transmission.

When a symbol has eight state values, 2 3 = 8, that is to say, when modulating, every three bits constitute a symbol, and its corresponding eight states are eight points in the constellation diagram, for example, 8PSK, that is, the symbol carries three bits of information.

General exams will tell you the value of RB, such as 9600 4800. Generally speaking, each symbol pulse can represent log2 M M-ary bits. That is, the relationship between bit rate and baud rate is Rb = RB log2M bps.