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引用次数: 0
摘要
在这封信中，我们介绍了串行双码和串行多码直接序列扩频（DSSS），并将其扩展到码分多址（CDMA）。我们为每个用户分配了两个或多个扩频码。信息与这些编码相关联，这些编码在一个 DSSS 信号中交替出现。我们分析了非相干解调新技术的性能。此外，我们还介绍了为卫星导航系统构建无数据先导信道的应用。交替编码可用于嵌入图案或信息，当识别到这些图案或信息时，可快速解决时间模糊问题，并简化 MEO 和 LEO 场景的初始同步。
Serial Multicode Direct Sequence Spread Spectrum With Applications to Satellite Navigation Pilot Channels
In this letter we introduce Serial Bicode and Serial Multicode Direct Sequence Spread Spectrum (DSSS) and we extend them to Code Division Multiple Access (CDMA). To each user are assigned two or more spreading codes. The information is associated to these codes, which are alternated within a single DSSS signal. The performance of the new techniques for incoherent demodulation is analyzed. Additionally, we present the application to the construction of data-less pilot channels for satellite navigation systems. Alternative codes can be used to embed a pattern or a message that, when recognized, allows to quickly solve time ambiguity and simplify initial synchronization for MEO and LEO scenarios.
期刊介绍：
The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.
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