IR-UWB数字相干接收机的硬件电路设计  

Design of the hardware circuit of IR-UWB digital coherent receiver

作　　者：丁正刚[1,2] 侯春宇[1,2] 于庆法 姜亚祥[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院大学,北京100190

出　　处：《电子设计工程》2013年第23期96-99,共4页Electronic Design Engineering

基　　金：中科院国家空间科学中心重点培育方向863课题资助(Y22116B995)

摘　　要：在超宽带信号的接收中,相干接收比非相干接收拥有更高的分辨率,能充分发挥超宽带信号定位精度高等优点。相干接收机对UWB信号进行高速采样后再处理,采样的速度和精度是限制UWB相干接收机测距精度的主要因素。本文设计并实现了IR-UWB的数字相干接收机,接收机采用高速采样芯片ADC08D1000对脉冲超宽带(IRUWB)信号进行双通道交织采样,然后使用FPGA对采样数据进行降速处理。测试结果证明,本文设计的接收机能准确捕获到脉宽为1 ns的UWB信号。Coherent receiving, with higher resolution than non-coherent receiving, can serve better to take full advantage of the high positioning accuracy of Ultra Wide-Band in UWB signal receiving systems. The coherent receiver requires high-speed sampling before the processing of UWB signals. The speed and accuracy of sampling are the key factors that limit the ranging accuracy of a UWB coherent receiver. The research has designed and realized a digital Ultra-Wide-Band receiver. In the research, dual-channel-interleaved sampling is used to digitize the analog IR-UWB signal by a high-speed ADC （ADC08D1000）, and the sampled data are decelerated by FPGA. The measured results have verified its suitability for precisely capturing UWB signal of lns pulse width.

关 键 词：脉冲超宽带 高速采样 相干接收 双通道交织采样 

分 类 号：TN914.3[电子电信—通信与信息系统]