| 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。 |
| 关键词: 扩频通信 PN码相位 最小二乘法 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| A Method for Accurately Measuring the Phase of PN Code in DSSS Systems |
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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. |
| Key words: Spectrum spread communication,Phase of PN code,Least squares method, |
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