【作者】 张宁；

【导师】 许洪光；

【作者基本信息】 哈尔滨工业大学 ， 信息与通信工程， 2006， 硕士

【摘要】 随着微电子器件的高速发展,超宽带技术开始应用于民用领域。在短距离通信中,超宽带通信以低功耗、高速率、高容量、多址接入等优点引起人们广泛的关注。它是一门很有发展前景的技术。本课题设计了一个全数字化超宽带接收器的ADC电路及数据存储系统。利用一个超高速的AD转换器,对超宽带窄脉冲信号进行数字化。采用了ADC与高速FPGA结合的方案,对接收的信号进行存储。在对接收系统具体指标进行分析的基础上,对芯片型号进行选择和设计。采用的ADC芯片是Atmel公司生产的AT84AD001,通过对其三线串行接口进行设置,使其工作在交错模式下,达到系统所需的采样率。采用的FPGA芯片是Altera公司的EP2S60F1020,对FPGA内部的专用收发器进行研究与利用,对FPGA与ADC的接口进行了详细的分析与设计。本文的研究内容主要包括以下几个方面:(1)第一章介绍了课题研究的背景及超宽带技术的发展状况。(2)第二章在分析应用软件无线电技术优势的基础上,提出了一种全数字化超宽带接收器的设计方案。分析接收器使用的ADC芯片和FPGA芯片的技术指标,并设计了由ADC和FPGA构成的2GHz的数据采集系统。(3)第三章分析并设计了ADC的工作方式。对ADC的外围电路进行设计,包括三线串口配置电路、模拟输入电路、时钟输入电路和电源电路。最后指出ADC电路在PCB设计中存在的问题。(4)第四章在分析交错模式采样原理的基础上,提出了解决通道失配误差的方法。(5)第五章对FPGA的电源、管脚分配和配置电路进行设计。通过FPGA专用的差分接收器对ADC输出的数据进行接收和降速,利用FPGA内部的FIFO资源对数据进行缓存,然后通过PC并口将FPGA接收的数据读入PC,以便于统计分析处理。更多还原

【Abstract】 With the rapid development of micro-electronics devices, Ultra-Wideband technology has begun to be applied in civil areas. In the short distance communication, with the advantageous qualities of low power consumption, high speed rate, high-capacity and multi-address access etc., the Ultra-Wideband communication arouses the people’s widespread interest. It is a technology with extensive application prosperity.In this topic, an ADC circuit and data-storage system for all digital Ultra-Wideband receiver was designed, and the Ultra-Wideband narrow pulse signal that is received is digitalized, using an ultra-high-speed A/D convertor. A plan with ADC and high speed FPGA was adopted in this system, and the signal which is received is storaged.The choice and design of chip are based on the analysis of concrete target of receiver system. The ADC chip chosen is AT84AD001 which is produced by Atmel Corporation, and the chip is setted on its 3-wire serial interface to work in interlaced mode, and this can achieve the sampling rate the system needs. The FPGA chip chosen is EP2S60F1020 of Altera Corporation, this topic studies and uses the internal dedicated transceiver and, analyzes and designs the interface between FPGA and ADC in detail. The contents in this topic include several aspects such as:(1) In the first chapter, the background of topic and the development of Ultra-Wideband technology are introduced.(2) In the second chapter, at the foundation of analysis of the application software wireless technology’s advantage, a plan of all digital Ultra-Wideband receiver is brought forward. The technology guideline of ADC chip and FPGA chip used in the receiver is analyzed, and the data-collecting system of 2GHz composed by ADC and FPGA is designed.(3) In the third chapter, the ADC’s working mode is analyzed and designed. The periphery electric circuit of ADC was designed, including 3-wire serial port configuration circuit, analog input electric circuit, clock input circuit and power更多还原