| Autor: |
ZHU Min, ZHAO Yafei, ZHANG Yuman, PENG Mugen |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Dianxin kexue, Vol 40, Pp 69-78 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1000-0801 |
| DOI: |
10.11959/j.issn.1000-0801.2024158 |
| Popis: |
A signal design method was proposed for communication and navigation integration,utilizing optimized cyclic code shift keying (CCSK) as communication spread spectrum modulation. The positive value of the cross-correlation function of the communication signal aligns with the peak value of the autocorrelation function of the navigation signal to overcome the cross-correlation interference and enhence the communication rate. The frequency bands of communication signal and navigation signal were divided by frequency division multiplexing. Based on orthogonal frequency division multiplexing (OFDM), three sub-carrier distribution schemes of continuous allocation, alternating allocation and random allocation were proposed. Simulation and analysis of the autocorrelation peak performance of integrated signal with optimized CCSK and CCSK modulation were conducted. The results demonstrate that under three subcarrier allocation schemes, the autocorrelation peak performance of the integrated signal employing optimized CCSK modulation surpasses that using only CCSK modulation. And the cross-correlation characteristic of communication signal modulated by optimized CCSK will enhance the autocorrelation peak value of the corresponding navigation signal, and improve the code phase synchronization performance of navigation signal under the integrated signal system. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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