An Improved Navigation Pseudolite Signal Structure Based on the Kasami Sequences and the Pulsing Scheme
An Improved Navigation Pseudolite Signal Structure Based on the Kasami Sequences and the Pulsing Scheme作者机构：School of Electronics Engineering and Computer Science Peking University
出 版 物：《Chinese Journal of Electronics》 (电子学报(英文))
年 卷 期：2022年第31卷第2期
页 面：220-226页
核心收录：
学科分类：08[工学] 0804[工学-仪器科学与技术] 0812[工学-计算机科学与技术（可授工学、理学学位）]
主 题：Pseudolites Near-far problem Pulsing scheme
摘 要：Pseudolites(PLs) are ground-based satellites, providing users with navigation solutions.However, implementation of the PL system leads to the near-far problem. In this paper, we proposed an improved navigation PL signal structure of combing Kasami sequences and the pulsing scheme to mitigate the near-far effect. The pulse modulation method is adopted to ensure that the PLs transmit signals at different timeslots and reduce the PL signals’ mutual interference. Additionally,we employ the small set of Kasami sequences with good cross-correlation properties to improve the anti-interference ability. A simulation test based on software is carried out to evaluate the performance of the proposed signal. The simulation proves that the improved PL signal has an impulsive power spectral density, makes it a feasible solution to mitigate the near-far effect, and performs better in the capture.
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