Distortionless 1/2 Overlap Windowing in Frequency Domain Anti-Jamming of Satellite Navigation Receivers

Lu, Zukun; Song, Jie; Huang, Lanping; Ren, Chao; Xiao, Zhibin; Li, Baiyu

doi:10.3390/rs14081801

Cited by 14 publications

(9 citation statements)

References 43 publications

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“…The LMS algorithm uses the steepest gradient descent to minimize the error signal's mean square value, which has the characteristics of small calculation and simple implementation [32]. Suppose that the intermediate frequency (IF) signal, noise, and interference received from an antenna and processed after DDC are   sn ,   nn and   jn , respectively, and they are all complex signals [33]. Then, the signal before anti-jamming can be expressed as:…”

Section: Time-domain Anti-jamming Modelmentioning

confidence: 99%

Robust Anti-Jamming Algorithm Based on Transmit/Receive Time-Sharing Technology

Song

et al. 2022

Machines

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Transmit/Receive (T/R) time-sharing is a critical technology to ensure accurate space–time reference information of navigation signals, which solves the problem of co-channel interference between receiver and transmitter. The rapid development of the electronic information industry has led to severe frequency band conflicts between different electronic systems. Satellite navigation receivers must take measures to suppress interference to eliminate the effects of narrowband interference, mainly unintentional interference. Time-domain anti-jamming is widely used in navigation receivers for its simple and easy advantages in ensuring the validity and stability of navigation data. However, because the satellite-ground link receivers adopt transmit/receive time-sharing technology to realize the bidirectional measurement and communication function of the link, the stability of the data solution is greatly affected by anti-interference in the time domain. The anti-jamming filter of the traditional navigation receiver usually re-converges from the initial state in each signal-receiving time slot, which leads to the receiver losing high volume data due to repeated convergence. This paper proposes a robust time-domain anti-jamming technology based on transmit/receive time-sharing technology. The continuity and stability of the interference signal are used to obtain the preliminary information of the periodic transceiver. The results show that robust anti-jamming technology based on a T/R time-sharing navigation signal can effectively improve the carrier-to-noise ratio loss and data loss caused by traditional time-domain anti-jamming technology, reduce the convergence time to nanosecond level, and has bright prospects in the future application of other navigation systems.

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Section: Time-domain Anti-jamming Modelmentioning

confidence: 99%

Robust Anti-Jamming Algorithm Based on Transmit/Receive Time-Sharing Technology

Song

et al. 2022

Machines

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“…The anti-jamming technologies comprise the time/frequency domain anti-jamming technology, based on a single antenna, and space-domain anti-jamming technology, based on the antenna array [12,13]. Space-domain anti-jamming technology can also be combined with other domain algorithms to form space-time and space-frequency technology.…”

Section: Introductionmentioning

confidence: 99%

Influence of sweep interference on satellite navigation time-domain anti-jamming

Qiao

et al. 2023

Front. Phys.

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The global navigation satellite system (GNSS), represented by global positioning systems (GPS), is widely used in various civil and military fields and represents an essential basis for space-time information services. However, the radar signals partially overlap with the frequency band of satellite navigation signals, seriously affecting the normal reception of weak satellite navigation signal power. To further improve anti-jamming with sweep interference in the time domain, this paper focuses on the sweep interference scenario, studies the influence of the sweep interference on time-domain-adaptive anti-jamming, and proposes a timing reset based on the adaptive filter. The proposed method can effectively deal with the influence of sweep interference on time-domain-adaptive anti-jamming and can suppress interference and protect signals at the same time. Simulation experiments verify the effectiveness of the anti-jamming method proposed in this paper. Under the typical simulation scenarios, the influence time of the frequency sweep interference on the navigation signal is less than 1 m when the timing reset period is 1 m, which is significantly reduced compared to traditional methods. The proposed anti-jamming method is of great significance for improving the survivability of satellite navigation receivers in sweep interference scenarios.

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“…Chen et al analyzed the influence of receiver group delay on QMBOC signal correlation peak, but did not involve signal threat and final ranging biases [26]. Li et al have done a lot of research on channel characteristics of navigation signals, which can provide theoretical reference for channel model in this paper [27][28][29][30][31][32][33][34][35]. In order to reduce the influence of group delay on signal ranging performance in actual receiver channel design, it is necessary to study the effect of channel characteristics on ranging performance to guide receiver design.…”

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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Distortionless 1/2 Overlap Windowing in Frequency Domain Anti-Jamming of Satellite Navigation Receivers

Cited by 14 publications

References 43 publications

Robust Anti-Jamming Algorithm Based on Transmit/Receive Time-Sharing Technology

Robust Anti-Jamming Algorithm Based on Transmit/Receive Time-Sharing Technology

Influence of sweep interference on satellite navigation time-domain anti-jamming

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

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