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Analysis of impact of group delay on slope distortion of S-curve in delay locked loop

Published online by Cambridge University Press:  09 February 2021

Yuqi Liu Open the ORCID record for Yuqi Liu [Opens in a new window] ,
Yihang Ran ,
Yi Yang ,
Lin Chen ,
Tuling Xiong  and
Hongchen Pan
Yuqi Liu*
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
Yihang Ran
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
Yi Yang
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
Lin Chen
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
Tuling Xiong
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
Hongchen Pan
Affiliation:
The 29th Research Institute of China Electronics Technology Group Corporation, Chengdu, China.
*
*Corresponding author. E-mail: liu.yuqi@139.com
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Abstract

As essential specifications of correlation domain for signal quality evaluation, distortions of the S-curve, including bias and slope distortions of the zero-crossing point, are usually selected as indicators of optimisation in the process of designing the channels of receivers or navigation satellites. Focusing on this issue, we present a detailed analysis of slope distortion in the presence of group delay and amplitude distortions. After validating the theoretical results, we present further discussions about the impacts of different group delay terms on slope distortions. The results indicate that both the odd-order and the even-order terms have impacts on the slope distortion, and higher odd-order terms have less slope distortion compared with the lower odd-order terms. These results are useful for evaluating the slope distortion from the group delay and guiding improvement in design of the channel.

Keywords

delay locked loopsatellite navigationsignal processingspread spectrumtracking loop
Type
Research Article
Information
The Journal of Navigation , Volume 74 , Issue 3 , May 2021 , pp. 698 - 712
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Copyright
Copyright © The Royal Institute of Navigation 2021

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