(无线通信发展史2.docVIP

马克思主义与当代 课程报告 题 目 无线通信概论 学 院 通信工程学院 专 业 通信与信息系统 学生姓名 学 号 摘要 在过去的十几年里无线通信已经成为电信行业中最大的产业之一，并逐渐成为21世纪最有前途的产业。在过去的十年中，蜂窝系统经历了指数型的快速增长，全球用户数已达20亿。无线通信爆炸式的增长以及笔记本电脑和掌上电脑的大量普及，充分显示出无线网络有着光明的前景。本文首先介绍了无线通信的起源与发展并简要介绍了与有线通信相比无线通信所面临的技术难题。然后详细介绍了与当代生活息息相关的蜂窝电话系统的概念提出与发展历程，以及在未来智能化社会中有巨大发展场景的无线自组织网络技术的特点与应用。最后，对无线通信的发展历程做出了总结，并思考无线通信技术发展的科学规律，以及对下一代无线通信做出展望。 关键词：无线通信 蜂窝 无线自组织网络 Abstract In the past ten years, wireless communications has become one of the largest industries of the telecommunications industry, and gradually became the most promising industry in the 21st century. In the past decade, the cellular system has experienced rapid exponential growth and the global number of users has reached 2 billion. The explosive growth of wireless communications and the large number of laptops and handheld computer spreading among the people, show that the wireless network has a bright future clearly. This paper first introduces the origin and development of wireless communications and briefly describes the technical challenges wireless communications facing compared to wired communications. Then it describes the concept and the course of development of cellular phone systems which are closely related to contemporary life, as well as the characteristics and application of the ad hoc wireless network which has tremendous development scenarios in the future intelligent society. Finally, this paper summarizes the course of development of the wireless communication, think about the law of development of wireless communication technology, as well as make outlook the next generation wireless communications. Keywords: Wireless Communication Cell Ad hoc Wireless Network 目录 第一章 引言 1 1.1无线通信的起源与发展 1 1.2 无线通信的特点和技术难题 2 1.3 本文章节安排 3 第二章 蜂窝电话系统 3 2.1 蜂窝概念的提出 3 2.2 蜂窝电话系统的特点及技术难题 4 2.2.1频率复用和系统容量 4