Partial Interferometric Processing of Reflected GNSS Signals for Ocean Altimetry

Partial Interferometric Processing of Reflected GNSS Signals for Ocean Altimetry
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用于海洋测高的反射 GNSS 信号的部分干涉处理

DOI:
10.1109/lgrs.2013.2297697
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发表时间:
2014-01
影响因子:
4.8
通讯作者:
Manuel Martín-Neira
Manuel Martín-Neira
中科院分区:
工程技术2区
文献类型:
--
作者:
Weiqiang Li;Dongkai Yang;Salvatore D’Addio;Manuel Martín-Neira

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全球导航卫星系统(GNSS)的双站反射信号已成为一个有吸引力的工具,用于星载海洋测高。为提高巴黎IoD使命的测距精度,提出了在不知道实际测距码的情况下利用GNSS信号全带宽的干涉处理方法。本文提出了一种新的星上处理方法,该方法利用部分GNSS信号分量的干涉测量来探索进一步提高测高精度的途径。以GPS L1波段为例,说明了提取部分信号分量的方案和干涉测量过程。文中还对该方法的测高灵敏度、单脉冲分辨力、信噪比和总体测高精度等测高性能进行了评估和比较。将所提议的方法推广到其他现有的和计划中的全球导航卫星系统和信号将保证巴黎概念的总体性能得到改进。
The bistatically reflected global navigation satellite systems (GNSS) signals have become an attractive tool for spaceborne ocean altimetry. The interferometric processing that can exploit the full bandwidth of the available GNSS signals without the knowledge of the actual ranging codes was proposed for the PARIS IoD mission to improve the ranging precision. This letter presents a novel on-board processing method which utilizes the interferometry of partial GNSS signal components to explore a further improvement of the altimetry precision. The scheme of extracting partial signal components and interferometry procedure, for GPS L1 band as an example, are illustrated. The assessment and comparison of achievable altimetric performance of the proposed method including the altimetric sensitivity, the resolution per pulse, the signal-to-noise ratio, and the overall altimetric precision are also introduced. The extension of the proposed method to other existing and planned GNSS systems and signals would guarantee an improvement in the overall performance of the PARIS concept.
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