基于高速ADC和FPGA的IR-UWB相干接收机设计

Design of an IR-UWB Coherent Receiver Based on High-Speed ADC and FPGA

为了探索超宽带(UWB)技术的空间应用,设计了一款脉冲无线超宽带(IR-UWB)的全数字化相干接收机。本系统利用高速采样芯片ADC08D1000对IR-UWB信号进行双通道交织采样,接下来利用Xilinx FPGA对采样数据进行降速处理。按照二分搜索、相干捕获、脉冲跟踪的方案进行接收系统设计,并对该接收机进行了实际测试。最终实现了1 ns脉宽的IR-UWB信号的正确接收和1 Mb/s码速率的OOK编码通信。

In order to investigate the application of ultra wide-band （UWB） for satellite communication, a digital coherent receiver is designed for impulse radio ultra wide-band （IR-UWB）. In the system, dual-channel-inter- leaved-sampling is used to digitize the analog IR-UWB by a high-speed ADC （ADC08D1000）, and the sampled data is decelerated by Xilinx FPGA. IR-UWB signal is received through binary-searching, coherent capturing and pulse tracking. The receiver is tested and the result shows it can receive 1 ns UWB pulse accurately and communicate at 1Mb/s.