Signal System Definition, What is Signal and System?

Signal and system are used in China's higher education, and the rise of signal and system in China's higher education is not long, but it is a compulsory core basic course for electronics majors, and the course is mainly based on mathematical analysis, which involves mathematical and physical methods, concepts, etc. are widely used in many fields such as communication, signal and information processing, electronics, computer science and technology, automatic control, circuits and systems. The relevant concepts and analytical methods covered in this course are its main areas of study.

In the signal and system, the corresponding mathematical model is established, and then the solution is analyzed according to the mathematical model, so as to give the obtained results physical interpretation and corresponding physical meaning.

Signals are defined and classified as follows:

1. Definition: A signal is a physical quantity that represents a message, such as an electrical signal that can represent different messages through changes in amplitude, frequency, and phase. There are two types of electrical signals: analog and digital. A signal is a tool that carries a message and is a carrier of the message.

2. Broadly speaking, it includes optical signals, acoustic signals and electrical signals. Classification: According to the actual use, the signal includes TV signals, broadcast signals, radar signals, communication signals, etc.; According to the time characteristics, there are deterministic signals and random signals.

Signal and system is a fundamental discipline in the fields of electronics, communications, control and computers. It deals with the problem of signal generation, transmission, processing, and control, as well as various mathematical tools and methods used to describe and analyze signals. Signal refers to the various forms of information transmitted in the system, such as sound, image, electrical signal, etc., and the system refers to the equipment, circuit or software that processes and controls the signal.

The basic theories of signals and systems include signal classification, time and frequency domain analysis, sampling and quantization, filtering, etc. It also includes some practical applications, such as control, modem, digital signal processing, etc. In the field of engineering, signal and system theory is widely used in many fields such as telecommunications, audio processing, automatic control and computer image processing, and plays an important role in engineering practice and product development.

Hello, I am happy to answer your questions, signals and systems (signals and systems) is a professional basic course at the undergraduate level of electronic information. Students should be familiar with the basic concepts, basic theories, and fundamental analysis methods covered in this pure key course, and use these classical theories to analyze, interpret, and calculate the problems of signals, systems, and their constraints on each other. The above is the content of my question, I hope to help you, I wish you a happy life, good health, and smooth work.