The quality of Internet communication has two important indicators, namely transmission rate and what

The quality of Internet communication has two important indicators, namely transmission rate and bit error rate. The transmission rate refers to the number of binary digits transmitted per second. It is an important indicator of serial communication and is used to characterize the rate of data transmission; while the bit error rate is an indicator of the accuracy of data transmission within a specified time.

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The quality of Internet communication has two important indicators, namely transmission rate and bit error rate.

Transmission rate

The so-called transmission rate refers to how many bits are transmitted per second. The transmission rate is also often called the baud rate. An international standard baud rate series is stipulated. The standard baud rate is also the most commonly used baud rate. The standard baud rate series is 110, 300, 600, 1200, 4800, 9600 and 19200.

The transmission rate refers to the number of binary digits transmitted per second (also called the number of bits), and the unit is bit/s. Baud rate is an important indicator of serial communication and is used to characterize the rate of data transmission. The higher the baud rate, the faster the data transfer speed. The actual transmission rate of characters is different from the baud rate. The actual transmission rate of characters refers to the number of character frames transmitted per second and is related to the character frame format.

The transmission time of each bit is defined as the reciprocal of the baud rate. Usually, the baud rate of asynchronous communication is between 50 and 9600bit/s. The baud rate is different from the transmit clock and the receive clock. The clock frequency is often 1, 16 or 64 times the baud rate. In asynchronous serial communication, the receiving device and the sending device maintain the same transmission baud rate and are synchronized with the sending device with the starting bit of character data. The conventions of start bits, parity bits, and stop bits must remain consistent during the same transmission, so that data can be successfully transmitted.

BER Errors in/total number of codes transmitted*100% [. If there are bit errors, there is a bit error rate. In addition, the bit error rate is also defined as a measure of the frequency of bit errors. Conducting research on bit error rates under specific conditions is of great significance to enhancing the performance of wireless communication systems and improving the quality of data transmission.

The bit error rate is the most commonly used indicator of data communication transmission quality. The formula that expresses the transmission quality of a digital system is "the number of bits of data in which one bit error occurs." For example, if one error occurs in 10,000 bits of data, the bit error rate is one in 10,000, or 10E-4. Bit error rate = number of error symbols/total number of transmitted symbols. The calculation formula is:

Bit error rate = number of error bits/total number of bits transmitted.

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