First Demonstration of Multipath Effects on Phase Synchronization Scheme for LT-1

Zhang Yanyan; Zhang Heng; Ou Naiming; Liu Kaiyu; Liang Da; Deng Yunkai; Wang Robert

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First Demonstration of Multipath Effects on Phase Synchronization Scheme for LT-1

机译：LT-1相位同步方案的多径效应的第一次演示

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LuTan-1 (LT-1) refers to an innovative mission of spaceborne bistatic synthetic aperture radar (BiSAR) adopting the phase synchronization scheme of pulse exchange, which is scheduled to be launched in 2020. In this mission, the multipath effect caused by the reflection of satellites and Doppler frequency shift resulting from the relative motion between satellites constitute two critically latent factors deteriorating the performance of the phase synchronization scheme. This article details a loss factor to evaluate the fading of synchronization signals under the reflection of smooth and rough surfaces and estimates the influence of Doppler frequency shift on synchronization signals. Furthermore, the multipath channel impulse response is modeled, and the correlation characteristics of multipath channel are described by the coherent bandwidth and coherent time. In addition, two simulation experiments based on the system parameters of LT-1, are implemented to assess the influence of time-invariant and -varying multipath effects on the phase synchronization scheme. A scale experiment is also executed to quantify the influence of multipath effect on phase synchronization, and its result demonstrates that the phase synchronization scheme of LT-1 can not only achieve full coverage of space and backup capability of pulse exchange but also meet the application requirements under multipath effect.

机译：LUTAN-1（LT-1）是指采用脉冲交换相位同步方案的星载双晶合成孔径雷达（B可达）的创新任务，该方案计划于2020年推出。在这项任务中，由此造成的多径效应由卫星之间的相对运动产生的卫星和多普勒频率的反射构成了两个批判性潜在的因素，恶化了相位同步方案的性能。本文详细介绍了评估光滑粗糙表面的反射下同步信号的损失因子，并估计多普勒频率变频对同步信号的影响。此外，模拟多径信道脉冲响应，并且通过相干带宽和相干时间描述多径信道的相关特性。此外，实现了基于LT-1的系统参数的两种仿真实验，以评估时间不变和 - 对相位同步方案的影响。还执行了规模实验以量化多径效应对相位同步的影响，其结果表明，LT-1的相位同步方案不仅可以实现脉冲交换的空间和备份能力的完全覆盖，还可以满足应用要求在多径效应下。

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来源
《IEEE Transactions on Geoscience and Remote Sensing》 |2020年第4期|2590-2604|共15页
作者
Zhang Yanyan; Zhang Heng; Ou Naiming; Liu Kaiyu; Liang Da; Deng Yunkai; Wang Robert;
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Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 100039 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Elect Elect & Commun Engn Beijing 100039 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China;

Chinese Acad Sci Inst Elect Dept Space Microwave Remote Sensing Syst Beijing 100190 Peoples R China;

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正文语种 eng
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关键词
Synchronization; Satellites; Frequency synchronization; Receiving antennas; Doppler effect; Rough surfaces; Surface roughness; Bistatic synthetic aperture radar (SAR); Doppler frequency shift; multipath effect; phase synchronization; scale experiment;

机译：同步;卫星;频率同步;接收天线;多普勒效应;粗糙的表面;表面粗糙度;双基地合成孔径雷达（SAR）;多普勒频移;多径效应;相位同步;规模实验;

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1. An Advanced Phase Synchronization Scheme for LT-1 [J] . Jin Guodong, Liu Kaiyu, Liu Dacheng, IEEE Transactions on Geoscience and Remote Sensing . 2020,第3期

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2. Demonstration of a Self-Synchronized Polyphase Sampling and Demultiplexing Scheme for Radio-Frequency Analog Signals [J] . Villa C., Kumavor P., Donkor E. IEEE Photonics Technology Letters . 2008,第6期

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3. Blind symbol timing synchronization scheme for real-time industrial wireless control network using high-speed preambleless OFDM systems over multipath fading channels [J] . Wang Wenjian, Tian Ye, Ahn Chang-Jun Digital Signal Processing . 2017,第期

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4. Demonstration of a Synthetic Phased Array Antenna for Carrier/Code Multipath Mitigation [C] . T. Pany, B. Eissfeller International Technical Meeting of the Satellite Division of the Institute of Navigation . 2008

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6. Implementation of a Phase Synchronization Scheme Based on Pulsed Signal at Carrier Frequency for Bistatic SAR [O] . Yafeng Chen, Da Liang, Haixia Yue, 2020

机译：双载SAR基于载波频率脉冲信号的相位同步方案的实现
7. Experimental Demonstration of an Operand Routing Network Prototype Employing Clock Control and Data Synchronization Scheme [O] . Kataeva Irina, Akaike Hiroyuki, Fujimaki Akira, 2012

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8. An Iterative Information-Reduced Quadriphase-Shift-Keyed Carrier Synchronization Scheme Using Decision Feedback for Low Signal-to-Noise Ratio Applications [R] . Simon, M., Tkacenko, A. 2006

机译：一种使用判决反馈的低信噪比应用的迭代信息减少四相移键控载波同步方案

First Demonstration of Multipath Effects on Phase Synchronization Scheme for LT-1

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