Analysis of phase bias between GNSS signal components caused by nonideal group delay

Liu, Yuqi; Yang, Yi; Chen, Lin; Pan, Hongchen; Ran, Yihang

doi:10.1002/navi.363

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…Due to the the non-idealization of power amplifier components and transmission channels, the orthogonality of in-phase and quadrature signal may be reduced. This orthogonal error leads to the tracking deviation of carrier phase and pseudo-codes, which will affect the high-precision positioning performance [ 9 ].…”

Section: Performance Evaluation Methodsmentioning

confidence: 99%

Performance Evaluation of CentiSpace Navigation Augmentation Experiment Satellites

Chen

Yang

et al. 2023

Sensors

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This paper presents the performance analysis of CentiSpace low earth orbit (LEO) experiment satellites. Distinguishing them from other LEO navigation augmentation systems, the co-time and co-frequency (CCST) self-interference suppression technique is employed in CentiSpace to mitigate significant self-interference caused by augmentation signals. Consequently, CentiSpace exhibits the capability of receiving navigation signals from the Global Navigation Satellite System (GNSS) while simultaneously broadcasting augmentation signals within the same frequency bands, thus ensuring excellent compatibility for GNSS receivers. CentiSpace is a pioneering LEO navigation system to successfully complete in-orbit verification of this technique. Leveraging the on-board experiment data, this study analyzes the performance of space-borne GNSS receivers equipped with self-interference suppression and evaluates the quality of navigation augmentation signals. The results show that CentiSpace space-borne GNSS receivers are capable of covering more than 90% visible GNSS satellites and the precision of self-orbit determination is at the centimeter level. Furthermore, the quality of augmentation signals meets the requirements outlined in the BDS interface control documents. These findings underscore the potential of the CentiSpace LEO augmentation system for the establishment of global integrity monitoring and GNSS signal augmentation. Moreover, these results contribute to subsequent research on LEO augmentation techniques.

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Section: Performance Evaluation Methodsmentioning

confidence: 99%

Performance Evaluation of CentiSpace Navigation Augmentation Experiment Satellites

Chen

Yang

et al. 2023

Sensors

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“…The disadvantage of SAW filters is that they introduce significant phase distortions and group delays to the received signals. It has been shown problematic for higherorder BOC modulated signals (Liu et al, 2020;Wendel et al, 2019). These group delays result in problems during tracking, introduce pseudo-range biases, and degrade the quality of the PVT.…”

Section: Equalizationmentioning

confidence: 99%

“…The impulse response has some amplitude values preceding the main peak and indicates the effort of the equalization to correct the signal. This signal's modulation is commonly used for group delay analysis in GNSS receivers (Liu et al, 2020;Wendel et al, 2019) due to its high bandwidth requirements and challenging multiple correlation peaks to process. The SAW filter causes the first trailing side-peak of the ACF to be larger than the actual one.…”

Section: Equalizationmentioning

confidence: 99%

Advanced and versatile signal conditioning for GNSS receivers using the high‐rate DFT‐based data manipulator (HDDM)

et al. 2021

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Proper signal conditioning is crucial for reliable Global Navigation Satellite System (GNSS) navigation. Signal conditioning includes correcting receiver front-end distortions, shaping noise, removing interferences, and altering the received signal. The high-rate DFT-based data manipulator (HDDM) is a versatile signal processing architecture based on the Discrete Fourier Transform (DFT). In this article, the HDDM is theoretically modeled, analyzed, and evaluated. Some applications are presented, including interference mitigation, spectrum reconstruction, overlay signal design, altering signal modulations, and signal equalization. Additionally, the complexity of one concrete hardware implementation is investigated. The HDDM has shown excellent results with interference mitigation, and it can simultaneously achieve other signal conditioning tasks. Processing several tasks with the same nested architecture provides a significant processing benefit compared to discrete processing architectures. It emphasizes the benefits of a single architecture to simultaneously address several signal condition tasks, as opposed to separate structures requiring significantly more processing or poorer synergy.

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“…Some suggestions about choosing proper correlator spacing and bandwidth were provided. Liu et al (2020) investigated the phase bias among the signal components modulated on the same centre frequency and revealed that the components having different types of modulation are more sensitive to the phase bias. Pseudo-range bias, which is directly related to S-curve bias, was evaluated using measurements extracted from the receiver (Hauschild and Montenbruck, 2016;Gong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Analysis of phase bias between GNSS signal components caused by nonideal group delay

Cited by 3 publications

References 14 publications

Performance Evaluation of CentiSpace Navigation Augmentation Experiment Satellites

Performance Evaluation of CentiSpace Navigation Augmentation Experiment Satellites

Advanced and versatile signal conditioning for GNSS receivers using the high‐rate DFT‐based data manipulator (HDDM)

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

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