Computer simulation of optical fiber communication system is an important means to plan and design this kind of system, demonstrate its feasibility and develop new systems. It can be used to evaluate the performance of the designed optical fiber transmission system and demonstrate its feasibility before hardware implementation, which can save a lot of time and money, and at the same time, the parameter values can be changed at any time in the analysis, which is convenient for theoretical research. ...

/machine _ electronics/communication/20100114127.html

Simulation analysis of optical fiber communication system (Optisystem simulation and program) [communication]

Computer simulation of optical fiber communication system is an important means to plan, design, demonstrate the feasibility and develop new systems for this kind of system. It can be used to evaluate the performance of the designed optical fiber transmission system and demonstrate its feasibility before hardware implementation, thus saving a lot of time and money. At the same time, the parameter values can be changed at any time in the analysis, which is convenient for theoretical research. Establish a convenient and reliable ...

/machine _ electronics/communication/200912/13688.html

Implementation of GSM mobile communication repeater project [communication]

Any radio frequency coverage will produce a "blind zone". One way to solve this problem is to increase the number of base stations or adjust the power level. This method is very expensive and brings some other problems. This paper introduces a more economical, cheap, fast and effective method, which has been adopted by many network operators-repeater. The main work of this paper describes the technology and principle of repeater. ...

/machine _ electronics/communication/200912/13686.html

Research and Implementation of GSM Mobile Communication Network Optimization (Unicom GSM Network Optimization) [Communication]

Abstract: With the intensification of competition among operators after China's entry into WTO, network quality has become the fundamental factor that determines the fate of mobile communication operators. Network optimization is becoming the focus of future mobile communication operators. Now, operators are concerned about how to maximize the potential of the network through optimization and improvement on the basis of the existing network. Excellent graduation design ...

/machine _ electronics/communication/200909/11300.html

Research on wireless network optimization (communication quality index) [communication]

The development of mobile communication today can be described as changing with each passing day and unpredictable? With the increasing demand for wireless communication, the importance of wireless network optimization is self-evident? This paper mainly introduces the problems and optimization methods in the process of wireless network optimization. In order to facilitate your understanding, this paper also introduces some theoretical knowledge of wireless communication. In view of the present situation, ...

/Machine _ electron/Communication/200909/ 1 1299 . html

Research on power carrier communication circuit (receiving modulation technology) [communication]

Power line communication is another communication network after telecommunication, telephone, wireless communication and satellite communication? Power line carrier communication uses power network as a channel to realize data transmission and information exchange? Because power line is the most common and widely covered physical medium in every family, it has great economic benefits and application prospects to realize data communication by using power line. ...

/machine _ electronics/communication/200909/10106.html

Single chip microcomputer serial communication transmitter [communication]

The serial communication transmitter of single chip microcomputer I made was mainly completed in the laboratory. Referring to related books and materials, I personally completed the circuit design, welding, inspection and debugging, and then wrote the transmission and display program in assembly language according to my own hardware and communication protocol, and then electrified and debugged, and finally realized the accurate transmission and display. In this process, it is necessary to choose appropriate components and reasonable circuit diagram. ...

/Machine _ electron/Communication/200908/73 15 . html

Research on Mobile Communication Handover Technology [Communication]

Mobile communication is the fastest-growing and most potential part in the field of contemporary communication, and has become the fastest-growing communication mode since the mid-1980s. However, with the decrease of cell radius, the switching times of mobile users will increase greatly, which will definitely increase the network burden, increase the drop rate and lead to the Q of users. S-level decline to meet customer requirements. ...

/Machine _ Electronics/Communication /200908/5962.html

Error correction detection method of digital communication system based on ARQ

In recent years, with the rapid development of computer technology and communication technology, great progress has been made in the research and application of ARQ (automatic repeat request) error control technology, and the application of ARQ error control technology has become more and more extensive? Most communication applications need to transmit data in real time? Throughput and delay are two main performance indicators in communication process and ARQ transmission? generally speaking ...

/Machine _ electronic/Communication/200908/5286 . html

Discussion on the development of the third generation mobile communication technology and its smooth transition [communication]

At present, the booming mobile communication? Multimedia communication service and IP network are the most striking and outstanding achievements in the field of 2 1 communication, and they are also one of the fastest developing fields. With the rapid increase of the proportion of these services, the shortcomings and limitations of the second generation mobile communication system are increasingly apparent, so market-driven and technology-driven urge people to explore and study new communication systems, that is, the first generation. ...

/Machine _ electronic/Communication/200908/528 1 . html

Discussion on the Third Generation Mobile Communication (3G) Network Construction Technology [Communication]

Informatization is an important theme in the development of today's world. Since 1990s, the global information construction has begun. With the advantages of information resources development and network application, we can grasp the initiative of information construction. Informatization, especially the construction of information infrastructure, has become a symbol of the comprehensive national strength of all countries. As the main industry of information industry, mobile communication ...

/Machine _ Electronics/Communication /200908/4663.html

Research on data error correction and error detection methods of digital communication system [communication]

When transmitting digitized data through a noisy channel, the received data will inevitably contain errors. Usually, the user puts forward an error rate, when it exceeds this error rate, the received data will not be used. When the received data does not meet the required bit error rate, error correction coding can usually be used to reduce the bit error rate to the allowable limit. In recent years, error correction coding has been widely used to solve this kind of problem. ...

/Machine _ Electronics/Communication /200908/4662.html

Design and reliability research of data frame synchronization in digital communication system [communication]

Abstract: in the process of digital communication, synchronization system, as a key technology, plays a vital role? In the normal data transmission process, information can be transmitted accurately only if synchronization is established between the sender and the receiver, so the reliability of synchronous information transmission is required to be higher than that of signal transmission? With the improvement of channel coding and decoding technology and the decrease of channel error rate, frames are the same. ...

/Machine _ Electronics/Communication /200908/4660.html

Analysis, Research and Discussion on Handover Technology in Mobile Communication [Communication]

In the planning and design of mobile communication system, the management and control of wireless resources occupy a central position and have an important impact on the overall performance of the system? Handover is an important part of radio resource management function, which directly affects the capacity and service quality of the system, and is also a unique function and key feature of cellular system? The user terminal is connected to the network in the initial cell. ...

/Machine _ electronic/Communication/200907/2649 . html

Research and Simulation of Power Control in WCDMA Mobile Communication [Communication]

With the development of society, the scope of human political and economic activities is constantly expanding and the efficiency is constantly improving, which puts forward higher requirements for communication services. The new generation of mobile communication is personal communication, also known as the third generation mobile communication system (3G), which is one of the hottest topics in the communication field. The goal of mobile communication is to achieve no matter who at any time. ...

/Machine _ electronic/Communication/200907/2648 . html

GPRS mobile communication technology [communication]

This paper is mainly divided into five parts to discuss this topic. Firstly, it introduces the demand motivation of General Packet Radio Service (GPRS), the ways and disadvantages of accessing Internet resources in GSM market and the advantages of GPRS. Then the differences between GPRS and GSM in data technology are compared, and the architecture and technology of GPRS are discussed, including how to transmit data packets correctly and how to use wireless resources. ...

/Machine _ electronic/Communication/200907/2645 . html

Simulation and analysis of access channel in CDMA communication system [communication]

CDMA technology is the main technology of wireless communication, especially mobile communication. Whether it is the CDMA network of China Unicom with the IS-95 standard that has been established in China, the third generation (3G) system that major mobile communication operators are going to experiment with, or the mobile communication system with wider bandwidth after the third generation (also called 4G) that has been developed by large equipment developers, CDMA is the main choice. ...

/Machine _ electronic/Communication/200907/2642 . html