• 欢迎访问速搜资源吧，如果在网站上找不到你需要的资源，可以在留言板上留言，管理员会尽量满足你！

# 【速搜问答】波特率是什么

3年前 (2020-11-10) 423次浏览

Chinese-English Translation:

Baud rate refers to the rate at which the effective data signal modulates the carrier, that is, the number of times the carrier modulation state changes in unit time. It is a measure of symbol transmission rate. 1 baud means that one symbol is transmitted per second, and multiple bit information can be loaded on a symbol by different modulation methods.

Baud rate refers to the rate at which the effective data signal modulates the carrier, that is, the number of times the carrier modulation state changes in unit time. It is a measure of symbol transmission rate. 1 baud means that one symbol is transmitted per second, and multiple bit information can be loaded on a symbol by different modulation methods.

The unit “baud” itself represents the number of modulation per second. It is a common error to use “baud per second” as the unit.

The formula of baud rate

Baud (unit symbol: BD) is named after French telecommunication engineer Jean Morris Emil Bodo (1845-1903). He is the inventor of telex and Bodo Telegraph and one of the pioneers of digital communication.

Baud rate can be understood as the number of transmitted symbols per unit time (symbol rate). Multiple bit information can be loaded on a symbol by different modulation methods. Therefore, there is a numerical relationship between the bit rate and the baud rate: I = s * log2n, where I is the transmission rate, s is the baud rate, n is the amount of information per symbol load, and log2n is in bits.

The distinction between baud rate and bit rate

Bit rate in digital channel, bit rate is the transmission rate of digital signal. It is expressed by the number of significant bits (bits) of binary code transmitted in unit time, and its units are bits / S (BPS), kilobits per second (kbps) or megabits per second (Mbps) (where K and m are 1000 and 1000000 respectively, instead of 1024 and 1000000 when computer memory capacity is involved) 1048576)。

The baud rate of the data in baud modulation.

Obviously, the bit rate of two-phase modulation (a single modulation state corresponds to one binary bit) is equal to the baud rate; the bit rate of four phase modulation (one modulation state corresponds to two binary bits) is twice that of baud rate; the specific rate of eight phase modulation (single modulation state corresponding to three binary bits) is three times of baud rate; and so on.

Baud rate is a measure of signal transmission rate, usually in baud. Baud rate is sometimes confused with bit rate, which is actually a measure of information transmission rate. Baud rate can be understood as the number of transmitted symbol symbols per unit time (symbol rate). Multiple bit information can be loaded on a symbol by different modulation methods.

Communication speed of modem. The baud rate is the number of times the line state has changed. Only if each signal corresponds to one bit of the transmitted data, it is equal to bits per second.

In order to communicate with each other, modems must operate at the same baud rate. If you set the baud rate of a modem to be higher than that of other modems, the faster modem will usually have to change its baud rate to match a slower modem.

(严格来说，波特率不在传输领域，出现传输、信道等字眼容易产生混淆，波特率描述的是单位时间内调制信号的能力，经它调制出来的信号才以比特的形式来传输，或者这样说，信号在传输过程中，如果要经过数模转换，就需要调制，那么传输时间除了消耗在其它领域外，还消耗在调制过程和在信道的传输过程，描述信号调制能力用波特率，描述信号传输能力用比特率。）

(strictly speaking, baud rate is not in the field of transmission. Words such as transmission and channel are easy to be confused. Baud rate describes the ability to modulate signals in unit time, and the signals modulated by it are transmitted in the form of bits. In other words, in the transmission process, if the signal needs to be modulated through digital to analog conversion, then the transmission time is consumed in other aspects In addition, it also consumes in the modulation process and the transmission process in the channel. The baud rate is used to describe the signal modulation capability, and the bit rate is used to describe the signal transmission capability.)

[361009623@qq.com]

• 版权声明

本站的文章和资源来自互联网或者站长
的原创，按照 CC BY -NC -SA 3.0 CN
协议发布和共享，转载或引用本站文章
应遵循相同协议。如果有侵犯版权的资
源请尽快联系站长，我们会在24h内删
除有争议的资源。
• 网站驱动

• 友情链接

• 支持主题