1: 1. The content and significance of graduation project;
Mobile communication has become a hot technology with the most development potential and the broadest market prospect in the field of contemporary communication. At present, there are three large-scale branches of mobile communication standards in the world: GSM, CDMA and TDMA, all of which are seizing the market. Global wireless technology is fragmented, and manufacturers constantly introduce new technologies to quickly seize the dominant position of industry standards. Although the third generation mobile communication (3G) standard is more powerful than the existing wireless technology, it will also lead to regional competition and standards incompatibility. People began to call for the unification of mobile communication standards by formulating the fourth generation mobile communication standards to solve the compatibility problem. At present, the International Telecommunication Union (ITU) has begun to study and formulate the fourth generation mobile communication standard, and reached a consensus that mobile communication systems should be combined with other systems (such as wireless local area network, W-LAN, etc.). ) 4G technology is produced, and the data transmission rate reaches 100Mbps before 20 10, thus providing more effective services. At present, the fourth generation mobile communication standard (4G) compatible with mobile communication technology has sprouted in the industry.
The fourth generation mobile communication technology is based on the traditional communication technology and adopts some new communication technologies to continuously improve the network efficiency and function of wireless communication. If 3G can provide people with a high-speed wireless communication environment, then 4G communication will be an ultra-high-speed wireless network, an information superhighway without cables. This new network will enable telephone users to connect in wireless and three-dimensional virtual reality. The most obvious advantages of 4G communication technology are call quality and data communication speed. Due to advanced technology, the cost is greatly reduced, and the communication cost of 4G in the future will be lower than 20 10. 4G will inevitably replace 3G and become the dominant technology in the future mobile communication field. 4G will definitely bring us a bright future of mobile communication.
The main contents are as follows:
The first chapter is the introduction. This paper introduces the concept and ultimate goal of mobile communication.
The second chapter is the development history of mobile communication. This chapter mainly introduces the background and development history of mobile communication, as well as the technical requirements and characteristics of each stage.
The third chapter is an overview of the fourth generation mobile communication. This chapter mainly introduces the background, concept, characteristics, network structure and system of the fourth generation mobile communication. And the key technologies used in the fourth generation mobile communication.
The fourth chapter is the development trend of the fourth generation mobile communication at home and abroad. This chapter mainly introduces the development status and trend of the fourth generation mobile communication at home and abroad.
The fifth chapter is the thinking and prospect of the fourth generation mobile communication. This chapter mainly introduces the development ideas and bright prospects of the fourth generation mobile communication.
The sixth chapter summarizes the main contributions and research work of this paper.
Second, literature review:
With the commercialization of the third generation mobile communication, the fourth generation mobile communication technology has become the focus of the industry. I believe that in the near future, 4G will become the mainstream of mobile communication, which will make our future life better.
After many inquiries and retrieval, the paper found many documents and reference materials about the fourth generation mobile communication technology, and summarized the relevant knowledge of the fourth generation mobile communication through careful analysis.
Firstly, the paper introduces the concept of mobile communication, the development history of mobile communication and the advantages and disadvantages of each stage. This paper mainly introduces the background, concept, characteristics, network structure and system of the fourth generation mobile communication in detail.
Technology determines the future development trend. This paper focuses on the key technology of the fourth generation mobile communication-orthogonal frequency division multiplexing (OFDM). Its main idea is to divide a given channel into many orthogonal subchannels in frequency domain, use a subcarrier for modulation on each subchannel, and transmit each subcarrier in parallel, which not only reduces the mutual interference between subcarriers, but also improves the spectrum utilization. Software radio technology; Smart antenna and multi-antenna (MIMO) technology, smart antenna can improve the signal-to-noise ratio, improve the communication quality of the system, alleviate the contradiction between the increasing development of wireless communication and the lack of spectrum resources, and reduce the overall cost of the system; IPv6 technology, etc.
Based on the adoption of the above key technologies and the development status at home and abroad, the problems faced by the fourth generation mobile communication are summarized, and its future development is prospected.
This paper is a summary after reading a lot of literature, which is believed to be of certain significance to understand the fourth generation mobile communication.
Three. References:
Li Jiandong. Mobile communication [M]. Xidian university Publishing House, 2006: May 9.
[2] Zhang Keping. LTE？ Wireless technology of B3G/4G mobile communication system [M]. Electronic Industry Press, 2008: 276 ~ 299
Zhao Jinghua. OFDM-the technical core of the fourth generation wireless communication [J]. Telecommunication Construction, 2002, (3): 6 1 ~ 63
[4] Li Chengnu. Thinking and Exploration of the Fourth Generation Mobile Communication [J]. Telecom Express, 200 1, (4): 10 ~ 13
Zheng Kan, Zoe, Wang Wenbo. 3G long-term evolution technology and system design [M]. Electronic Industry Press, 2007: 105 ~ 137.
[6] You Xiaohu. Prospect of future mobile communication research and development in China [N]. People's Posts and Telecommunications, 2003
[7] Gu Liping. Reflections on the Fourth Generation Mobile Communication [J]. Science and Technology Herald, 2002, (10): 34 ~ 36
Liu Lianghua. Mobile communication technology [M]. Beijing: Science Press, 2007:181~192.
Peng Yi, Cha Guangming. The fourth generation mobile communication system and its prospect [J]. Telecommunication Science, 2002, (06): 8 ~ 1 1
[10] children, Principle and application of OFDM mobile communication technology [M]. Beijing: People's University of Posts and Telecommunications Press, 2003: 2 17 ~ 234.
[1 1] Tang Xing. History and development trend of mobile communication technology [J]. Jiangxi Communication Technology, 2008, (2): 16 ~ 20
[12] Zhang Xianying .. Analysis of the fourth generation mobile communication technology [J]. Digital Communication World, 2008, (6): 7 1 ~ 74.
Thanks. The fourth generation mobile communication technology based on TDD [M]. Electronic industry press, 2005: 68 ~ 125.
[14] Lei Chunjuan, Li Chengshu. Discussion on some problems of the fourth generation mobile communication [J]. Mobile Communication, 2002, (06): 1 ~ 5
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Student name XXXXXX student number XXXXXXXXX lecturer XXXXXX
First, the content and significance of graduation project:
Mobile communication has become a hot technology with the most development potential and the broadest market prospect in the field of contemporary communication. At present, there are three large-scale branches of mobile communication standards in the world: GSM, CDMA and TDMA, all of which are seizing the market. Global wireless technology is fragmented, and manufacturers constantly introduce new technologies to quickly seize the dominant position of industry standards. Although the third generation mobile communication (3G) standard is more powerful than the existing wireless technology, it will also lead to regional competition and standards incompatibility. People began to call for the unification of mobile communication standards by formulating the fourth generation mobile communication standards to solve the compatibility problem. At present, the International Telecommunication Union (ITU) has begun to study and formulate the fourth generation mobile communication standards, and reached a consensus that mobile communication systems should be combined with other systems (such as wireless local area network, W-LAN, etc.). ) 4G technology is produced, and the data transmission rate reaches 100Mbps before 20 10, thus providing more effective services. At present, the fourth generation mobile communication standard (4G) compatible with mobile communication technology has sprouted in the industry.
The fourth generation mobile communication technology is based on the traditional communication technology and adopts some new communication technologies to continuously improve the network efficiency and function of wireless communication. If 3G can provide people with a high-speed wireless communication environment, then 4G communication will be an ultra-high-speed wireless network, an information superhighway without cables. This new network will enable telephone users to connect in wireless and three-dimensional virtual reality. The most obvious advantages of 4G communication technology are call quality and data communication speed. Due to advanced technology, the cost is greatly reduced, and the communication cost of 4G in the future will be lower than 20 10. 4G will inevitably replace 3G and become the dominant technology in the future mobile communication field. 4G will definitely bring us a bright future of mobile communication.
The main contents are as follows:
The first chapter is the introduction. This paper introduces the concept and ultimate goal of mobile communication.
The second chapter is the development history of mobile communication. This chapter mainly introduces the background and development history of mobile communication, as well as the technical requirements and characteristics of each stage.
The third chapter is an overview of the fourth generation mobile communication. This chapter mainly introduces the background, concept, characteristics, network structure and system of the fourth generation mobile communication. And the key technologies used in the fourth generation mobile communication.
The fourth chapter is the development trend of the fourth generation mobile communication at home and abroad. This chapter mainly introduces the development status and trend of the fourth generation mobile communication at home and abroad.
The fifth chapter is the thinking and prospect of the fourth generation mobile communication. This chapter mainly introduces the development ideas and bright prospects of the fourth generation mobile communication.
The sixth chapter summarizes the main contributions and research work of this paper.
Second, literature review:
With the commercialization of the third generation mobile communication, the fourth generation mobile communication technology has become the focus of the industry. I believe that in the near future, 4G will become the mainstream of mobile communication, which will make our future life better.
After many inquiries and retrieval, the paper found many documents and reference materials about the fourth generation mobile communication technology, and summarized the relevant knowledge of the fourth generation mobile communication through careful analysis.
Firstly, the paper introduces the concept of mobile communication, the development history of mobile communication and the advantages and disadvantages of each stage. This paper mainly introduces the background, concept, characteristics, network structure and system of the fourth generation mobile communication in detail.
Technology determines the future development trend. This paper focuses on the key technology of the fourth generation mobile communication-orthogonal frequency division multiplexing (OFDM). Its main idea is to divide a given channel into many orthogonal subchannels in frequency domain, use a subcarrier for modulation on each subchannel, and transmit each subcarrier in parallel, which not only reduces the mutual interference between subcarriers, but also improves the spectrum utilization. Software radio technology; Smart antenna and multi-antenna (MIMO) technology, smart antenna can improve the signal-to-noise ratio, improve the communication quality of the system, alleviate the contradiction between the increasing development of wireless communication and the lack of spectrum resources, and reduce the overall cost of the system; IPv6 technology, etc.
Based on the adoption of the above key technologies and the development status at home and abroad, the problems faced by the fourth generation mobile communication are summarized, and its future development is prospected.