UWB定位系统FPGA基带处理设计

The baseband design of UWB positioning system with FPGA

基于到达时间差(TDOA)算法,设计了一个脉冲超宽带(IR-UWB)室内定位系统的原理验证样机。主要介绍传感器捕捉标签发送的IR-UWB窄脉冲,进而测出窄脉冲到达传感器时刻的方法。利用FPGA中数字时钟管理器(DCM)的相移器功能模块(PS)构成延迟锁相环(DLL),测得到达传感器的窄脉冲相对于同步时钟的时刻。原理验证系统定位精度优于40cm,达到设计要求。

This paper designs an ultra-wideband impulse radio （IR-UWB） indoor positioning principle verification prototype system based on time difference of arrival （TDOA） method. It mainly introduces a method of the sensor to capture the IR-UWB pulse sent by label, that means the time IR-UWB pulse reaches the sensor. Using FPGA digital clock manager （DCM） phase shifter module （PS）, we form a delay lock Joop （DLL） to capture the IR-UWB pulse, and measure the moment of IR-UWB pulse reaches the sensor from the label. The positioning accuracy of the principle verification system is better than 40 cm, that meets the design requirements.