Home Common Problem What are the characteristics of digital signals

What are the characteristics of digital signals

Jan 30, 2023 pm 03:26 PM
Digital signal

Features are: 1. Strong anti-interference ability and no noise accumulation. 2. Facilitates encryption processing; the digitally transformed signal can be encrypted and decrypted using simple digital logic operations. 3. The signal form of digital communication is consistent with the signals used by computers, and they are all binary codes. Therefore, it is easy to use computers to store, process and exchange digital signals, which can make the management and maintenance of communication networks automated and intelligent. 4. The equipment is easy to integrate and miniaturize. 5. It is convenient to form an integrated digital network and an integrated service digital network. 6. The occupied channel frequency band is wider.

What are the characteristics of digital signals

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is a digital signal

Digital signal refers to a signal in which the independent variable is discrete and the dependent variable is also discrete. The independent variable is represented by an integer and the dependent variable is represented by a number among finite numbers. In computers, the size of digital signals is often represented by binary numbers with limited bits.

Digital signals refer to using a set of special states to describe signals. Typically, signals are represented by the most common binary numbers. The fundamental reason why binary numbers are used to represent signals is that circuits can only Represents two states, namely, on and off of the circuit. In actual digital signal transmission, a certain range of information changes are usually classified as state 0 or state 1. The setting of this state greatly improves the anti-noise ability of digital signals. Not only that, in terms of confidentiality, anti-interference, transmission quality, etc., digital signals are better than analog signals, and they save more signal transmission channel resources.

What are the characteristics of digital signals

Characteristics of digital signals:

1. Strong anti-interference ability and no noise accumulation. In analog communications, in order to improve the signal-to-noise ratio, the attenuated transmission signal needs to be amplified in time during the signal transmission process. The noise inevitably superimposed on the signal during the transmission process is also amplified at the same time. As the transmission distance increases, more and more noise accumulates, causing the transmission quality to seriously deteriorate.

For digital communications, since the amplitude of the digital signal has a limited number of discrete values ​​(usually two amplitudes), although it is also interfered by noise during the transmission process, when the signal-to-noise ratio deteriorates to a certain extent At this time, the decision regeneration method is used at an appropriate distance to regenerate the same digital signal as the original transmitter without noise interference, so long-distance high-quality transmission can be achieved.

2. Convenient encryption processing. The security and confidentiality of information transmission are becoming more and more important. The encryption of digital communication is much easier than that of analog communication. Taking voice signals as an example, the digitally transformed signal can be encrypted and decrypted using simple digital logic operations.

3. Easy to store, handle and exchange. The signal form of digital communication is consistent with the signals used by computers. They are all binary codes. Therefore, it is easy to network with computers and to store, process and exchange digital signals with computers. It can make the management and maintenance of communication networks automated and intelligent.

4. The equipment is easy to integrate and miniaturize. Digital communications use time division multiplexing and do not require bulky filters. Most of the circuits in the equipment are digital circuits and can be implemented with large-scale and very large-scale integrated circuits, so they are small in size and have low power consumption.

5. It is convenient to form an integrated digital network and an integrated service digital network. Using digital transmission mode, digital exchange can be carried out through program-controlled digital switching equipment to achieve the integration of transmission and exchange. In addition, telephone services and various non-telephone services can be digitized to form an integrated service digital network.

6. The occupied channel frequency band is wider. The frequency band of one analog phone is 4kHz bandwidth, and the frequency band of one digital phone is about 64kHz. This is the main reason why analog communication still has vitality. With the extensive use of broadband channels (optical cables, digital microwaves) (a pair of optical cables can open thousands of telephone lines) and the development of digital signal processing technology (the bit rate of a digital telephone line can be compressed from 64kb/s to 32kb/s Even lower digital rates), the bandwidth problem of digital phones is no longer a major issue.

For more related knowledge, please visit the FAQ column!

The above is the detailed content of What are the characteristics of digital signals. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Two Point Museum: All Exhibits And Where To Find Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

deepseek web version official entrance deepseek web version official entrance Mar 12, 2025 pm 01:42 PM

The domestic AI dark horse DeepSeek has risen strongly, shocking the global AI industry! This Chinese artificial intelligence company, which has only been established for a year and a half, has won wide praise from global users for its free and open source mockups, DeepSeek-V3 and DeepSeek-R1. DeepSeek-R1 is now fully launched, with performance comparable to the official version of OpenAIo1! You can experience its powerful functions on the web page, APP and API interface. Download method: Supports iOS and Android systems, users can download it through the app store; the web version has also been officially opened! DeepSeek web version official entrance: ht

In-depth search deepseek official website entrance In-depth search deepseek official website entrance Mar 12, 2025 pm 01:33 PM

At the beginning of 2025, domestic AI "deepseek" made a stunning debut! This free and open source AI model has a performance comparable to the official version of OpenAI's o1, and has been fully launched on the web side, APP and API, supporting multi-terminal use of iOS, Android and web versions. In-depth search of deepseek official website and usage guide: official website address: https://www.deepseek.com/Using steps for web version: Click the link above to enter deepseek official website. Click the "Start Conversation" button on the homepage. For the first use, you need to log in with your mobile phone verification code. After logging in, you can enter the dialogue interface. deepseek is powerful, can write code, read file, and create code

How to solve the problem of busy servers for deepseek How to solve the problem of busy servers for deepseek Mar 12, 2025 pm 01:39 PM

DeepSeek: How to deal with the popular AI that is congested with servers? As a hot AI in 2025, DeepSeek is free and open source and has a performance comparable to the official version of OpenAIo1, which shows its popularity. However, high concurrency also brings the problem of server busyness. This article will analyze the reasons and provide coping strategies. DeepSeek web version entrance: https://www.deepseek.com/DeepSeek server busy reason: High concurrent access: DeepSeek's free and powerful features attract a large number of users to use at the same time, resulting in excessive server load. Cyber ​​Attack: It is reported that DeepSeek has an impact on the US financial industry.