What does the signaling system consist of? What is the difference between the first signaling system

Generally, it is composed of the source (originating equipment), the host (receiving equipment) and the channel (transmission medium), which is called the three elements of communication.

Everything that can be perceived by the human senses is the first signal, and the formation of the second signal is inseparable from the function of the language center of the human brain.

From the perspective of the signal and the system itself, there is no division between the first signal system and the second signal system, and some schools may have different emphases on the signals and systems learned in different majors, so as to distinguish between a first signal system and a second signal system.

There are many ways to classify signals, and the signals are based on mathematical relationships, value characteristics, energy power, processing analysis, time function characteristics, and whether the value is a real number.

It can be divided into deterministic and non-deterministic signals (also known as random signals), continuous signals and discrete signals (i.e., analog signals.

and digital limb signals), energy and power signals, time-domain signals, and frequency domains.

Signals, time-limited signals and frequency-limited signals, real signals and complex signals, etc.

1. Analog signal.

Analog signal refers to the signal waveform that simulates the change of information and changes, and its main feature is that the amplitude is continuous, and an infinite number of values can be taken; In time, it can be continuous or discontinuous.

2. Digital signal.

A digital signal is a signal that is discrete not only in time but also in amplitude, and can only take a finite number of values. For example, telegraph signals, pulse code modulation (PCM) signals, etc. are all digital signals. A binary signal is a digital signal that is a combination of two digits, "1" and "0", to represent different information.

Hello landlord, let me explain. There is a course called: Signals and Systems, this course that I took for the graduate school entrance examination, briefly summarized:

The signal is generally an electrical signal, and to put it bluntly, it is the relationship between voltage or current and time t: u(t)=f(t); i(t)=f(t)

Whereas, a system refers to a complete circuit. Generally by input; Resistors, capacitors, and inductors pass through a circuit composed of certain lines.

According to the above, voltage and current are signals, in a circuit, we call the total input current or voltage as the input signal, but we generally study the voltage or current of a certain device or a module, and the voltage and current of this study are called output signals.

So the relationship between them is clear: you are given an input signal (input voltage or current), and you are asked to analyze the output signal (output voltage or current) of a device through a system (circuit).

Of course, I am talking about being a part of the signal and system, if the landlord is interested, you can look at the textbook, the more authoritative are: Zheng Junli's "Signal and System", Wu Dazheng's "Linear Analysis of Signal and System", Guan Zhizhong's "Signal and System", and then Oppenheimer's "Signal and System".

If the landlord has any questions, please contact him.

Information system is a man-machine integrated system composed of computer hardware, network and communication equipment, computer software, information resources, information users and rules and regulations for the purpose of processing information flow. There are five basic functions, namely, the input, storage, processing, output and control of information. The information system has gone through three stages of development: simple data processing information system, isolated business management information system, and integrated intelligent information system.

The function of the car signaling system is to provide driving information to the outside world to improve driving safety, reduce the occurrence of traffic accidents. Its main components are: (1) Turn signal:

The turn signal is located at the four corners of the vehicle, and when the vehicle turns or changes lanes, it sends out the flashing signal of light and dark alternately, indicating the direction of travel of the vehicle. The light is amber.

Commonly used signal systems are thermal signal systems and electrical signal systems.

Question type: Q&A What are the requirements for the simple loop laid when the locomotive signaling system is detected? Question Type:

Q&A What are the functions of the expert test system software of the BT-01T 2000 locomotive signal host test bench? Question Type: Q&A Please draw a JTL-CZ2000 locomotive.

Success is in the sky, planning is in people, things are in people, and there is a will!

Life is the ordinary present and the present tense, and there is no ordinary past tense.

The simplest is Nyquist's law. In the two processes of film production and ** film, the sampling and reduction theorem of the signal. 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.

The application of signal and system in China's higher education is a compulsory core basic course for electronics majors, and the course is mainly based on mathematical analysis, in which the mathematical and physical methods and concepts involved in Liang Wu are widely used in many fields such as communication, signal and information processing, electronics, computer science and technology, automatic control, circuits and systems.

Syllabus. Basic knowledge of signals and systems;

Time-domain analysis of continuous signals and systems;

Conversion domain analysis of signal and system tartar;

Discrete signal and system time domain analysis;

system functions; Analysis of state variables of signal and scrambler signal system.