The rate of the analog line signal, also known as the modulation rate, is measured in terms of the number of oscillations per second of the waveform. If the data is not compressed, the baud rate is equal to the number of data bits transmitted per second. If the data is compressed, the number of bits transmitted per second is usually greater than the modulation rate, so that the exchange uses baud and bits/second occasionally. error.
The baud rate refers to the modulation rate of the data signal to the carrier, which is expressed by the number of times the carrier modulation state changes per unit time, and its unit is Baud. The relationship between the baud rate and the bit rate is the bit number corresponding to the bit rate = baud rate X single modulation state.
In the information transmission channel, the signal unit carrying the data information is called a symbol, and the number of symbols transmitted through the channel per second is called a symbol transmission rate, which is simply referred to as a baud rate. The baud rate is an indicator of the transmission channel bandwidth.
The amount of information transmitted through the channel per second is called the bit transmission rate, or simply the bit rate. The bit rate represents the transmission rate of valid data.
Baud rate analysis example
In the field of electronic communication, the baud rate, ie, the modulation rate, refers to the number of baudes per unit time after the signal is modulated, that is, the number of times the carrier parameters change per unit time. It is a measure of the signal transmission rate, usually in "baud per second" (Bps). The baud rate is sometimes confused with the bit rate, which is actually a measure of the information transmission rate (transmission rate). The baud rate can be understood as the number of transmitted symbol symbols per unit time (transmission symbol rate), and multiple bit information can be loaded on one symbol by different modulation methods.
The communication speed of the modem. The baud rate is the number of times the line status has changed. Only if each signal matches one bit of the transmitted data is equal to the number of bits per second.
In order to communicate with each other, the modem must operate at the same baud rate. If the modem's baud rate is set higher than the baud rate of other modems, faster modems typically change their baud rate to match slower modems.
The difference between baud rate and bit rate
Bit rate In a digital channel, the bit rate is the transmission rate of a digital signal, which is expressed in terms of the number of bits of the binary code transmitted per unit time, in units of bits per second, bit/s (bps), per bit. The number of second kilobits (Kbps) or megabits per second (Mbps) is expressed (where K and M are 1000 and 1000000, respectively, instead of 1024 and 1048576 when it comes to computer memory capacity).
Baud Rate The baud rate refers to the modulation rate of the data signal to the carrier. It is expressed by the number of times the carrier modulation state changes per unit time, and its unit is Baud.
The bit rate is numerically related to the baud rate:
[1] where I is the transmission rate, S is the baud rate, and N is the amount of information per symbol load, in bits.
How to distinguish between the two? Obviously, the bit rate of two-phase modulation (single modulation state corresponds to 1 binary bit) is equal to the baud rate; the bit rate of four-phase modulation (single modulation state corresponds to 2 binary bits) is two of the baud rate. Double; eight-phase modulation (single modulation state corresponds to three binary bits) bit rate is three times the baud rate; and so on.
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