A Pilot-Aided Method of Doppler Offset Estimation and Compensation

2021 IEEE 6th International Conference on Computer and Communication Systems (ICCCS) Pub Date : 2021-04-23 DOI:10.1109/ICCCS52626.2021.9449150

Zhao-Ming Huang

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引用次数: 3

Abstract

Low earth orbit (LEO) satellite has attracted worldwide attention due to its wide coverage, low transmission delay, and low transmission loss. Therefore, it has been given many uses including military communication. Direct sequence spread spectrum (DSSS) is widely used in military communication for its good ability of anti-jamming and anti-eavesdropping. However, the high-speed movement of LEO satellite relative to the terminal will cause serious carrier offset and pseudo-noise (PN) code offset of DSSS receiver signal, which seriously increases the complexity of the algorithm. In this paper, a pilot-aided method of Doppler offset estimation and compensation is proposed. The real-time Doppler carrier offset and PN code offset between satellite and terminal are estimated by terminal processing of the pilot signal, and real-time precompensation is carried out when sending uplink service signal or receiving downlink service signal. Through hardware verification, this method can significantly reduce the resource consumption of terminal and satellite.

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一种导航辅助的多普勒偏置估计与补偿方法

近地轨道卫星以其覆盖范围广、传输时延低、传输损耗小等优点受到世界各国的广泛关注。因此，它被赋予了许多用途，包括军事通信。直接序列扩频(DSSS)以其良好的抗干扰和抗窃听能力在军事通信中得到了广泛的应用。然而，低轨道卫星相对于终端的高速运动将导致DSSS接收机信号出现严重的载波偏移和伪噪声(PN)码偏移，从而严重增加了算法的复杂度。本文提出了一种导航辅助的多普勒偏置估计和补偿方法。通过导频信号的终端处理估计卫星与终端之间的实时多普勒载波偏移和PN码偏移，并在发送上行业务信号或接收下行业务信号时进行实时预补偿。通过硬件验证，该方法可以显著降低终端和卫星的资源消耗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE 6th International Conference on Computer and Communication Systems (ICCCS)

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