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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (2): 132-139    DOI: 10.1631/jzus.C1000132
    
Effect of chip rate on the ranging accuracy in a regenerative pseudo-noise ranging system
Jian-wen Jiang, Wei-jun Yang, Chao-jie Zhang*, Xiao-jun Jin, Zhong-he Jin
Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
Effect of chip rate on the ranging accuracy in a regenerative pseudo-noise ranging system
Jian-wen Jiang, Wei-jun Yang, Chao-jie Zhang*, Xiao-jun Jin, Zhong-he Jin
Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
 全文: PDF(287 KB)  
摘要： The ranging accuracy of a pseudo-noise ranging system is mainly decided by range jitter and time delay discrimination. Many factors can affect the ranging accuracy, one of which is the chip rate. In digital signal processing, the time delay discrimination and autocorrelation function of sampled ranging sequences of different chip rates are very different. An approximation simulation model is established according to an in-phase quadrature (I/Q) correlator which is used to evaluate the time delay. Simulation results of the range jitter and time delay discrimination show that the chip rate which provides a non-integer sample-to-chip rate ratio can achieve a higher ranging accuracy, and some test results validate the simulation model. In some design missions, the simulation results may help to select an optimum sample-to-chip rate ratio to satisfy the design requirement on the ranging accuracy.
关键词： Ranging accuracy;  Range jitter;  Time delay discrimination;  Sample-to-chip rate ratio;  Integration time;  Autocorrelation function;  Fractional chip period delay    
Abstract: The ranging accuracy of a pseudo-noise ranging system is mainly decided by range jitter and time delay discrimination. Many factors can affect the ranging accuracy, one of which is the chip rate. In digital signal processing, the time delay discrimination and autocorrelation function of sampled ranging sequences of different chip rates are very different. An approximation simulation model is established according to an in-phase quadrature (I/Q) correlator which is used to evaluate the time delay. Simulation results of the range jitter and time delay discrimination show that the chip rate which provides a non-integer sample-to-chip rate ratio can achieve a higher ranging accuracy, and some test results validate the simulation model. In some design missions, the simulation results may help to select an optimum sample-to-chip rate ratio to satisfy the design requirement on the ranging accuracy.
Key words: Ranging accuracy    Range jitter    Time delay discrimination    Sample-to-chip rate ratio    Integration time    Autocorrelation function    Fractional chip period delay
收稿日期: 2010-05-03 出版日期: 2011-02-08
CLC:  TN96  
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Jian-wen Jiang
Wei-jun Yang
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Xiao-jun Jin
Zhong-he Jin

引用本文:

Jian-wen Jiang, Wei-jun Yang, Chao-jie Zhang, Xiao-jun Jin, Zhong-he Jin. Effect of chip rate on the ranging accuracy in a regenerative pseudo-noise ranging system. Front. Inform. Technol. Electron. Eng., 2011, 12(2): 132-139.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1000132    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2011/V12/I2/132

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