| Summary: | 碩士 === 國立中央大學 === 通訊工程研究所碩士在職專班 === 96 === Abstract
Ultra-wideband wireless communication technology (UWB) has developed very rapidly in recent years is a new wireless communications technology. According to its specific meaning of the U.S. Federal Communications Commission, it is defined as ultra-wideband signal is -l0dB relative bandwidth of more than 20 percent or absolute bandwidth of 500 MHz. Ultra-wideband wireless communication system has many obvious advantages, for example: it has a large capacity communication, low-power density of radiation, anti-multi-path interference, simple structure and confidentiality, and so on. This makes it be regarded as short-distance, high-speed wireless communications the most potential for development of the physical layer technology. Ultra-wideband wireless communication system has a broad prospect, will become the next wireless network in the Pan-an important part. At present, UWB in the business of multimedia equipment, wireless sensor networks, wireless location, family and personal networks, intelligent transportation systems, and many other areas of application has been universally recognized profession. Therefore, the establishment and improvement of ultra-wideband wireless communication system''s basic theory, to resolve their key technologies, is a very important scientific and practical significance.
This paper first describe the UWB pulse on the communications system and the basic principles of the historical development, its basic theory in an in-depth research and analysis on the basis of request to reduce the signal to noise ratio system, improve the anti-noise performance, thereby reducing the system error Rate for clues, a design based on the direct pulse debugging TH-UWB system. The system has the following characteristics: a clear system of modules, transmitters use high-performance short pulse of narrow-band circuit, making signals with strong anti-noise characteristics; receiver by the diversity reception Rack, effective from the signal Noise in the separation and merger, greatly reducing the system''s signal to noise ratio requirements, thus effectively reducing the system''s non-rate. The main innovation of this paper is: this system reduces the signal to noise ratio requirements, improves the anti-noise performance, and thereby reduces the error rate for clues. The UWB system block diagram of the system design, system design and key modules made the system performance achieve that a low signal to noise ratio requirements of the UWB system structure.
|
|---|
