论文标题
连贯分布式遥感系统的远程载体同步技术
A Remote Carrier Synchronization Technique for Coherent Distributed Remote Sensing Systems
论文作者
论文摘要
阶段,频率和时间同步是许多应用程序的关键要求,例如多静态遥感和通信系统。此外,当节点在机载或太空传播平台上绕或飞行时,同步解决方案变得更加具有挑战性。本文比较了用于在分布式遥感应用程序中用于同步和协调的可用技术。此外,本文提出了一个通用系统模型,并确定了实施利用卫星间通信链接的同步机制的初步准则和关键要素。这项工作中引入的分布式相同步循环通过在每个节点上传输两个载波,在全双工点到点方案中涉及自我干扰。所有载体均以中央频率围绕中心频率(称为中央频率或波束形成频率)出现不同的频率偏移。这项工作包括对拟议算法的详细分析以及所需的模拟,以验证其在不同相位噪声,AWGN和多普勒偏移方案的性能。
Phase, frequency, and time synchronization are crucial requirements for many applications, such as multi-static remote sensing and communication systems. Moreover, the synchronization solution becomes even more challenging when the nodes are orbiting or flying on airborne or spaceborne platforms. This paper compares the available technologies used for the synchronization and coordination of nodes in distributed remote sensing applications. Additionally, this paper proposes a general system model and identifies preliminary guidelines and critical elements for implementing the synchronization mechanisms exploiting the inter-satellite communication link. The distributed phase synchronization loop introduced in this work deals with the self-interference in a full-duplex point to point scenario by transmitting two carriers at each node. All carriers appear with different frequency offsets around a central frequency, called the application central-frequency or the beamforming frequency. This work includes a detailed analysis of the proposed algorithm and the required simulations to verify its performance for different phase noise, AWGN, and Doppler shift scenarios.