The Impact of Carrier Leakage and Spectral Asymmetry Distortions on the Performance of Navigation Signals

He, Chengyan; Guo, Ji; Lu, Xiaochun; Wang, Xue; Liu, Feng

doi:10.1007/978-3-642-29193-7_13

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…Phelts [18,19]. The influence of waveform threat on ranging performance was analyzed by He et al The signal used was BPSK signal, which did not involve the analysis of IBOC signal [20][21][22][23]. Gabriel Wong et al introduced the threat of different satellite signals and the ranging biases under different code intervals [24].…”

Section: Introductionmentioning

confidence: 99%

Analysis of ranging biases of BOC signal threat based on non-ideal channel group delay characteristics

Liu

Xiao²,

Xiaozhou³

et al. 2023

Front. Phys.

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Satellite signal threat is an important kind of satellite signal anomaly, which will lead to ranging biases of user receiver. BOC modulation is used more and more widely in the field of satellite navigation system. In the existing literature, there is a shortage that the non-ideal characteristics of the channel are not taken into account in the ranging biases analysis of BOC signal threat. The non-ideal characteristic of the receiving channel is one of the main bias sources of navigation signal reception. In the process of receiving navigation signal, due to the jitter caused by channel noise and the non-ideal phase of the channel, ranging biases will be introduced. To solve this problem, this paper proposes the analysis model of ranging biases of BOC signal threat based on non-ideal channel characteristics, and analyzes the non-ideal group delay characteristics of BOC (1,1) signal incoherent ranging mode. From the analysis results of ranging biases under multiple threated signals, it can be seen that the non-ideal group delay characteristics will worsen the ranging biases of BOC signal threat in most cases. In the sense of minimum ranging biases caused by BOC signal threat, 0.3chip∼0.35chip is the recommended parameter for non-coherent reception of BOC (1,1) early late code.

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Section: Introductionmentioning

confidence: 99%

Analysis of ranging biases of BOC signal threat based on non-ideal channel group delay characteristics

Liu

Xiao²,

Xiaozhou³

et al. 2023

Front. Phys.

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“…Later, sub-band transform interference suppression is put forward in spread spectrum communication systems, although it has a better frequency domain energy aggregation, but has the same limitations with the fixed transform base frequency domain interference processing technology, such as spectrum leakage between adjacent sub bands and fixed time-frequency resolution. Especially for time varying and non-stationary interferences, such as pulse jamming, the transform domain processing technique is invalid [3] .…”

Section: Introductionmentioning

confidence: 99%

Study of the Interference Rejection Based on ATF in DSSS

Zhang¹,

Xu²,

Peng³

et al. 2016

MATEC Web of Conferences

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Abstract.A novel, adaptive time-frequency interference rejection for suppressing the interference in Direct Sequence Spread Spectrum communication systems is studied in this paper. For a time-localized interference, excision is performed in the time domain. When a frequency domain excision is decided, an adaptive sub-band transform is employed. The most proper sub-spectral split is defined according to the spectrum of the received signal. This joint treatment of time and frequency domains overcomes the performance limitations of the fixed transform-based excision algorithms. The paper presents the performance evaluation of the rejection technique via the analytical and computer simulation tools. It is found that the analytical performance tools match up with the computer simulation results. It is also shown that the proposed adaptive time-frequency interference rejection consistently outperforms the existing interference excision techniques in the literature.

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“…Carrier leakage can be regarded as a special type of continuous-wave interference (CWI), and in particular, the incompletely suppressed carrier occupies a certain proportion of the transmitter power, causing a power loss of the desired signal. Many papers have studied the hazards of carrier leakage [1,3,4], including transmit power waste, effective carrierto-noise ratio (C/N0) loss, phase-locked loop performance loss and consequent ranging bias. Thus, developing real-time monitoring techniques against this integrity threat is of great importance.…”

mentioning

confidence: 99%

Low‐complexity GNSS carrier leakage detection and estimation via abnormal direct current energy identification

Bai

Sun

Zhao

et al. 2022

Electronics Letters

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Carrier leakage due to faults within the satellite payload results in a waste of transmit power and affects the receiver functions. The existing methods are generally performed in the transform domain with high computation load and are unable to estimate the carrier leakage power. This letter presents a low‐complexity algorithm by monitoring the abnormal direct current component of baseband signal. The quantitative relationship between carrier leakage power and test statistics is derived here, and the capability of carrier leakage power estimation is provided. Analytical and simulation results show that it achieves a detection rate of more than 99% for carrier‐to‐noise ratio larger than 42 dB‐Hz and coherent integration time larger than 10 ms. It also greatly saves millions of multiplications compared with the conventional frequency‐domain method.

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The Impact of Carrier Leakage and Spectral Asymmetry Distortions on the Performance of Navigation Signals

Cited by 3 publications

References 1 publication

Analysis of ranging biases of BOC signal threat based on non-ideal channel group delay characteristics

Analysis of ranging biases of BOC signal threat based on non-ideal channel group delay characteristics

Study of the Interference Rejection Based on ATF in DSSS

Low‐complexity GNSS carrier leakage detection and estimation via abnormal direct current energy identification

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