| 长椭圆球波函数在卫星导航中的应用研究 |
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| 引用本文： | 周艳玲,胡修林,唐祖平.长椭圆球波函数在卫星导航中的应用研究[J].宇航学报,2011(9). |
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| 作者姓名： | 周艳玲 胡修林 唐祖平 |
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| 作者单位： | 华中科技大学;湖北大学知行学院; |
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| 摘 要： | 卫星导航信号的码片波形是影响系统跟踪精度和抗多径干扰性能的重要因素。首次提出将时域上集中分布同时在频域上能量聚集性最佳的长椭球波函数(Prolate Spheroidal Wave Functions,PSWF)作为导航信号码片波形,并对比分析了相同码速率和带宽限制下的PSWF码片波形和二进制偏移载波(Binary Offset Carrier,BOC)调制码片波形的跟踪和抗多径性能。结果表明:在合适的带宽范围内,PSWF码片波形具有和带限BOC调制码片波形结构相似的相关函数和功率谱密度;PSWF码片波形在跟踪精度和抗多径干扰方面整体上优于带限BOC调制码片波形。综合分析,PSWF码片波形具备较好的导航性能,可作为我国卫星导航信号波形设计的一种新选择。
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| 关 键 词： | 卫星导航 码片波形 长椭球波函数 码跟踪 抗多径 |
Research on Application of Prolate Spheroidal Wave Functions in Satellite Navigation |
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| ZHOU Yan-ling,HU Xiu-lin,TANG Zu-ping.Research on Application of Prolate Spheroidal Wave Functions in Satellite Navigation[J].Journal of Astronautics,2011(9). |
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| Authors: | ZHOU Yan-ling HU Xiu-lin TANG Zu-ping |
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| Institution: | ZHOU Yan-ling1,2,HU Xiu-lin1,TANG Zu-ping1(1.Huazhong University of Science and Technology,Wuhan 430074,China,2.Zhixing College of Hubei University,Wuhan 430011,China) |
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| Abstract: | The pulse shape of navigation signal is an important factor affecting the navigation system performances such as tracking accuracy and anti-multipath interference.In this paper presented the prolate spheroidal wave functions(PSWF) concentratively distributed in the time domain and energy maximized in the specified bandwidth is proposed as a new kind of navigation signal pulse shape.The PSWF pulse shape is compared with the binary offset carrier(BOC) pulse shape at the same code rate and bandwidth constraint... |
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| Keywords: | Satellite navigation Pulse shape Prolate spheroidal wave functions Code tracking Anti-multipath |
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