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首页> 外文期刊>Aerospace and Electronic Systems, IEEE Transactions on >Towards Low Cost, High Speed Data Sampling Module for Multifunctional Real-Time UWB Radar
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Towards Low Cost, High Speed Data Sampling Module for Multifunctional Real-Time UWB Radar

机译：面向多功能实时UWB雷达的低成本，高速数据采样模块

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摘要

There is a need for the development of a low cost, low jitter, fast processing hardware for various ultrawideband (UWB) radar applications, such as dynamic real-time imaging and micro-Doppler human motion detection with high range resolution. Achieving such high range resolution is typically limited by the availability of low cost gigahertz sampling speed electronics. In order to achieve dynamic real-time imaging, a fast refresh rate and high-speed processing are essential, but they are typically very expensive and difficult to obtain. To circumvent the need for these very expensive processors, an equivalent time sampling method has been successfully applied to implement a compact data acquisition module with a low cost solution. The developed integrated compact module supports dual sampling channels with a maximal 100 giga-samples per second (GSPS) equivalent time sampling rate and relatively low jitter. The equivalent time sampling technique achieves a relatively high effective capture rate, however, this is at a cost of complicated timing control logic and sampled data reconstruction. The developed module includes a novel, robust, efficient, low-jitter data preprocessing scheme implemented in field-programmable gate arrays (FPGAs), and a faster back projection method based on look-up table for real-time 2D imaging. In the work presented here, the design details of the newly developed system as well as its performance are discussed. Various examples of utilizing the developed radar for real-time high resolution target imaging and micro-Doppler detection are also presented.
机译：需要开发用于各种超宽带（UWB）雷达应用的低成本，低抖动，快速处理硬件，例如动态实时成像和具有高分辨率的微多普勒人体运动检测。获得如此高的范围分辨率通常受到低成本千兆赫采样速度电子设备可用性的限制。为了实现动态实时成像，快速刷新率和高速处理是必不可少的，但是它们通常非常昂贵且难以获得。为了避免对这些非常昂贵的处理器的需求，已经成功地采用了等效的时间采样方法来实现具有低成本解决方案的紧凑型数据采集模块。开发的集成紧凑模块支持双采样通道，最大每秒100千兆采样（GSPS）等效时间采样率，并且抖动相对较低。等效的时间采样技术可实现相对较高的有效捕获率，但是，这是以复杂的时序控制逻辑和采样数据重建为代价的。开发的模块包括在现场可编程门阵列（FPGA）中实现的新颖，强大，高效，低抖动的数据预处理方案，以及基于查找表的实时2D成像更快的反向投影方法。在此处介绍的工作中，讨论了新开发的系统的设计细节及其性能。还介绍了利用开发的雷达进行实时高分辨率目标成像和微多普勒探测的各种示例。

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