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

Abstract

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.

Tradeoff of Code Estimation Error Rate and Terminal Gain in SCER Attack

“…For deceived satellite navigation receivers, the signals received by the RF front-end include the deception signal and real satellite signal. The RF signal is transformed into the intermediate frequency signal after being processed by the RF front-end such as multi-stage bandpass filtering, low noise amplification, and mixing [29]- [32]. it can be modeled as:…”

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

“…The traditional BPSK signal threat model can be extended to the BOC signal threat. In Figure 1, satellite signal generation components include digital devices and analog devices in two categories [5,[36][37][38]. The second-order step threat model is divided into three basic models based on the failure condition of each type of device: digital threat (Threat Model A, TM A), analog threat (Threat Model B, TM B), digital-analog threat (Threat Model C, TM C).…”

Performance analysis of SMI filter for antenna array receiver in pulse interference environment

“…It is clear that antenna array receivers have perfect interference suppression performance under continuous and stationary interferences [3,4]. But the interferences faced by antenna array receivers are diverse and constantly occurring, and non-stationary and intermittent interferences are part of the threats [5][6][7][8][9]. Pulse interference is one type of intentional interferences from jammers [6,10,11].…”