UWB定位系统中标签接收机的FPGA实现

Implementation of the Tag-receiver in UWB Location System based on FPGA

本文给出了一个适用于超宽带(UWB)定位系统的标签接收机实现方案,针对该方案的基带处理部分,提出多路并行能量收集非相干检测与线性步进相位搜索相结合的方法,实现简单、快速的超宽带信号同步捕获;捕获之后,采用三态循环检测算法对标签用户码(ID码)进行识别。相对于传统的相干检测捕获以及单一的用户码检测、判决识别算法,体现了该方案具有实现简单、捕获迅速以及识别准确的优越性。最后,在QuartusII6.0的平台上,通过VHDL编程设计与仿真,验证了该方案的可行性以及有效性。

This article has introduced one kind of tag-receiver which can be applied in Ultra-Wide Band （UWB） location system. Aimed at the baseband circuit of this tag-receiver, a multi-channel parallel energy collects of non-coherent detection with the linear step-by- step phase search algorithm is proposed, which makes the UWB signal synchronization acquisition simple and fast. After synchronization acquisition, the ＂three states＂ circular detection algorithm is used to identify the tag user code （the ID code） accurately. Relative to the traditional coherent detection capture and the simple ID identification, the characteristic of simpleness,speediness and accuracy is embodied in this project. At the end of this article, the feasibility and validity of this project is validated with the VHDL program and simulation on the development platform-QuartusII6.0.