| 直接序列扩频通信系统中PN码相位的精确测量方法 |
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| 引用本文： | 胡修林,张俊,杨灵.直接序列扩频通信系统中PN码相位的精确测量方法[J].电讯技术,2005,45(3):128-131. |
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| 作者姓名： | 胡修林 张俊 杨灵 |
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| 作者单位： | 华中科技大学,电信系,湖北,武汉,430074;华中科技大学,电信系,湖北,武汉,430074;华中科技大学,电信系,湖北,武汉,430074 |
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| 摘 要： | 本文提出了一种精确测量本地PN码和输入PN码相位差的方法,这种方法结合了数值分析算法和数字信号处理技术,通过对鉴相单元输出值的处理得到很高的测量精度,并且由于这种方法为全数字方法,可以用FPGA、DSP等处理芯片方便地实现。文中给出了计算机仿真的结果,并根据仿真结果分析了此方法的准确度和抗噪声性能。这种方法在伪码测距、高精度伪码捕获跟踪、差分定位等领域中有很大的应用价值。
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| 关 键 词： | 扩频通信 PN码相位 最小二乘法 |
| 文章编号： | 1001-893X(2005)03-0128-04 |
A Method for Accurately Measuring the Phase of PN Code in DSSS Systems |
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| HU Xiu-lin,ZHANG Jun,YANG Ling.A Method for Accurately Measuring the Phase of PN Code in DSSS Systems[J].Telecommunication Engineering,2005,45(3):128-131. |
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| Authors: | HU Xiu-lin ZHANG Jun YANG Ling |
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| Abstract: | A method for accurately measuring the phase error between the local PN code and the received PN code is studied. This method is a combination of numerical analysis algorithm and DSP technology. It analyses the output of phase-error unit to gain high accuracy. Besides, it is a all-digital method which can be realized conveniently. The accuracy and the anti-noise performance of the method are analyzed based on the result of computer simulation. This method is of great value in the fields of pseudorandom ranging, high-accuracy pseudorandom acquisition and tracking, differential orientation and so on. |
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| Keywords: | Spectrum spread communication Phase of PN code Least squares method |
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