Journal of Systems Engineering and Electronics
• 电子技术 • 上一篇 下一篇
刘海波，吴德伟，袁银勇，闫占杰
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LIU Hai-bo，WU De-wei，YUAN Yin-yong，YAN Zhan-jie
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摘要：
针对长周期扩频卫星信号信噪比低、多普勒影响明显、码周期长等特点，提出了一种长周期直接序列扩频卫星信号载频检测和功率估计方法；分析了所提方法中多普勒频率线性近似对载频估计的影响，并进行了仿真验证。以全球卫星导航系统（Global Positioning System，GPS）星座参数为例，对所提方法进行了仿真，并分析了积分时长对本地频率搜索步长的影响。结果表明，所提方法能够有效抑制多普勒频率的影响，检测下限达到-12 dB。
Abstract:
The long-period spread spectrum satellite signal is characterized by long cycle, low signal-to-noise ratio and considerable Doppler frequencies, aiming at which, a new frequency detection and power estimation method is proposed. The Doppler frequency linear approximation effects are analyzed and verified by simulations. Then, the capability of the proposed method is tested by using Global Positioning System (GPS) satellite parameters, and the impacts of the integration time length on the local frequency search step are analyzed. Simulations indicate the proposed method can well counteract Doppler frequency effects, and its capability reaches -12dB.
刘海波，吴德伟，袁银勇，闫占杰. 长周期DSSS/BPSK 卫星信号载频和功率估计方法[J]. Journal of Systems Engineering and Electronics, doi: 10.3969/j.issn.1001-506X.2013.07.5.
LIU Hai-bo，WU De-wei，YUAN Yin-yong，YAN Zhan-jie. New method for long-period DSSS / BPSK satellite signal carrier detection and power estimation[J]. Journal of Systems Engineering and Electronics, doi: 10.3969/j.issn.1001-506X.2013.07.5.
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链接本文: https://www.sys-ele.com/CN/10.3969/j.issn.1001-506X.2013.07.5
https://www.sys-ele.com/CN/Y2013/V35/I7/1380
