A Flexible Constant-Envelope Dual-Frequency Multiplexing for Next-Generation BDS

Menglei Guo, Zheng Yao, Mingquan Lu

Peer Reviewed

Abstract:	The evolution of the signals broadcast by Global Navigation Satellite System (GNSS) towards multi-component, multi-frequency and multi-modulation schemes, together with limited spectrum resources and onboard payload capabilities impose stringent demands on the navigation signal design. To alleviate the spectrum congestion in the L-band and enhance data transmission capability, broadcasting navigation signals in the S-band and C-band has become an important direction for next-generation BeiDou Navigation System (BDS). However, the available bandwidth in these new bands is constrained. As a result, both the trade-off between ranging and demodulation performance under band-limited conditions and efficient transmission of signals become key design constraints. In response to these challenges, this paper analyzes the demodulation performance, code tracking performance, and receiver complexity of several typical modulation techniques under band-limited conditions, and further designs corresponding constant-envelope multiplexing (CEM) methods for the optimal schemes, providing a flexible option for the signal design of next-generation BDS.
Published in:	Proceedings of the ION 2026 Pacific PNT Meeting April 13 - 16, 2026 Hilton Waikiki Beach Honolulu, Hawaii
Pages:	1 - 10
Cite this article:	Guo, Menglei, Yao, Zheng, Lu, Mingquan, "A Flexible Constant-Envelope Dual-Frequency Multiplexing for Next-Generation BDS," Proceedings of the ION 2026 Pacific PNT Meeting, Honolulu, Hawaii, April 2026, pp. 1-10. https://doi.org/10.33012/2026.20568
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In