Traditional Culture Encyclopedia - Traditional culture - How to synchronize unipolar non-return-to-zero codes? What are the disadvantages of traditional synchronization methods?
How to synchronize unipolar non-return-to-zero codes? What are the disadvantages of traditional synchronization methods?
Unipolar non-return-to-zero code, no voltage means "0", constant positive voltage means "1", the midpoint of each symbol time is the sampling time, and the decision threshold is half-width level.
If synchronization is realized, there are two synchronization modes: bit synchronization mode and group synchronization mode.
The shortcomings of traditional synchronization method-group synchronization;
The role of start and stop bits is very important. The start bit indicates the beginning of the character, and the synchronization of the bits in the character is started at the receiving end; The stop bit is set to the spacing bit between characters. If there is no stop bit, the falling edge of the start bit of the next character immediately after it may be lost. Additional bits need to be added, such as start bit, check bit and stop bit. Compared with synchronous transmission, the coding efficiency and channel utilization are lower.
- Related articles
- What is the difference between domestic logistics and international logistics
- What are the characteristics of Japanese houses?
- Traditional martial arts action video
- Hand-woven diamond flower pattern
- How do you mix the colors of the magnolia (white) in a brush painting? What kinds of pigments are used?
- Which kebab is delicious in Handan at night?
- Fitness is a dead muscle, which is perhaps the biggest cognitive misunderstanding of traditional Wushu.
- China ancient science and technology civilization history review 2000 words.
- Want to lose weight, what are the taboos on diet?
- Characteristics of Cui Ying Middle School in Shantou City