| 正交叉积副载波调制与导航信号复用 |
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| 引用本文： | 罗显志,王垚. 正交叉积副载波调制与导航信号复用[J]. 电波科学学报, 2009, 24(6) |
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| 作者姓名： | 罗显志 王垚 |
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| 作者单位： | 1. 中国电子科技集团第54研究所,河北省卫星导航技术与装备工程技术研究中心,河北,石家庄,050081
2. 中国电子科技集团第54研究所,河北省卫星导航技术与装备工程技术研究中心,河北,石家庄,050081;哈尔滨工程大学,黑龙江,哈尔滨,150001 |
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| 摘 要： | 针对卫星导航现代化条件下的导航信号复用问题,在对正交叉积正弦副载波调制信号和正交叉积方波副载波调制信号的调制方法进行详细分析的基础上,提出了一种新的基于正弦波采样的正交叉积副载波调制方法.应用周期信号的傅立叶级数展开方法,给出了以上三种调制信号的调制表达式和功率效率,并根据这些结果比较了三种副载波调制信号的性能.分析和仿真结果表明:正交叉积正弦副载波调制和正交叉积方波副载波调制都是正交叉积抽样正弦副载波调制的特例,而当抽样指数大于16时,正交叉积抽样正弦副载波调制信号在性能上与正交叉积正弦副载波调制信号接近,但实现方式却比较简单.
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| 关 键 词： | 卫星导航 信号复用 正交副载波调制 功率效率 |
QPSM and navigation signal multiplexing |
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| LUO Xian-zhi,WANG Yao. QPSM and navigation signal multiplexing[J]. Chinese Journal of Radio Science, 2009, 24(6) |
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| Authors: | LUO Xian-zhi WANG Yao |
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| Affiliation: | LUO Xian-zhi1 WANG Yao1,2 (1.The 54 Research Institute of CETC,Hebei Satellite Navigation Technology , Equipment Engineer Technology Center,Shijiazhuang Hebei 050081,China,2.Harbin Engineering University,Harbin Heilongjiang 150001,China) |
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| Abstract: | Aimed at navigation signal multiplexing in the condition of satellite navigation system modernization,signal multiplexing methods based on sine wave and square wave quadrature product subcarrier modulation (QPSM)are analyzed in detail. A new subcarrier modulation method based on sample sine wave is proposed. Formulae nd power efficiencies of these three subcarrier modulation signals are given using Fourier series expansion. The performances of these three methods are compared based on the analysis conclusio... |
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| Keywords: | satellite navigation signal multiplexing quadrature product subcarrier modulation(QPSM) power efficiency |
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