基于RFSoC的NavIC导航与传感集成系统
RFSoC-Based Integrated Navigation and Sensing Using NavIC
AI总结：
本文提出基于RFSoC的NavIC卫星远程探测系统，通过同步接收通道捕获地面反射信号，生成延迟-多普勒图并验证不同信噪比下的性能。
摘要：
先前的研究已经提出了将全球导航卫星系统（GNSS）基础设施用于远程探测地面和海上目标的二次应用。本文提出了一种被动雷达接收器，用于通过捕获地面反射的卫星信号来检测不合作的目标。本文展示了一个基于AMD Zynq射频系统芯片（RFSoC）平台的L波段导航与印度星座（NavIC）卫星基于的远程探测接收系统原型。引入了两个同步接收通道，用于捕获来自卫星的直接信号（DS）和从目标返回的地面反射信号（GRS）。这些信号在RFSoC的ARM处理器和现场可编程门阵列（FPGA）上进行处理，以生成地面目标的延迟-多普勒图。性能首先在RFSoC的回环配置中得到验证。接下来，DS和GRS信号通过Keysight任意波形发生器（AWG）的两个端口输出进行模拟，并与RFSoC接口，随后进行处理以获得延迟-多普勒图。性能在不同信噪比（SNR）下得到验证。
英文摘要：
Prior art has proposed a secondary application for Global Navigation Satellite System (GNSS) infrastructure for remote sensing of ground-based and maritime targets. Here, a passive radar receiver is deployed to detect uncooperative targets on Earth's surface by capturing ground-reflected satellite signals. This work demonstrates a hardware prototype of an L-band Navigation with Indian Constellation (NavIC) satellite-based remote sensing receiver system mounted on an AMD Zynq radio frequency system-on-chip (RFSoC) platform. Two synchronized receiver channels are introduced for capturing the direct signal (DS) from the satellite and ground-reflected signal (GRS) returns from targets. These signals are processed on the ARM processor and field programmable gate array (FPGA) of the RFSoC to generate delay-Doppler maps of the ground-based targets. The performance is first validated in a loop-back configuration of the RFSoC. Next, the DS and GRS signals are emulated by the output from two ports of the Keysight Arbitrary Waveform Generator (AWG) and interfaced with the RFSoC where the signals are subsequently processed to obtain the delay-Doppler maps. The performance is validated for different signal-to-noise ratios (SNR).
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