Abstract
Aiming at the problem that satellite navigation signals are easily interfered by the radio frequency (RF) pulse signal, the electromagnetic interference effect of RF pulse on the navigation receiver is studied in this paper. A mathematical model of the pulse interference signal is established, and we choose the bit error rate (BER) as an indicator of the quality of the BDS signal. It is found that the BER is proportional to the duty cycle of the pulse signal and inversely proportional to the equivalent carrier-to-noise ratio (C/N0) through simulation. Then, an experiment of electromagnetic injection on the BDS receiver has been carried out, which studied the influence of the pulse interference parameters, such as repetition frequency and duty cycle on the C/N0 of the BDS signal and the electromagnetic sensitivity threshold of the receiver. The comparative experiment between the pulse interference and the single-frequency continuous wave (CW) interference was also carried out, and we found that the effect of the pulse interference is better than that of single-frequency CW interference. The former is the correlation interference, and the latter is the blocking interference. Combined with the experiment phenomenon, the interference mechanism was further analyzed according to the relationship between the pulse period and the ranging code period of the navigation signal.
Highlights
In recent years, the Beidou Navigation Satellite System (BDS) independently developed by China has been widely used in military, civilian, and commercial fields
To verify the reliability of the above theoretical analysis and simulation results, and explore the interference of navigation signals and the degradation of the BDS receiver performance under the actual pulse interference, this section is aimed at a certain BDS receiver, and the following electromagnetic injection experiments are carried out. e BDS signals that we investigate in this paper are the B1I signals, adopting BPSK modulation, and the working frequency of which is 1561 MHz
The time-frequency domain characteristics of the pulse interference signal were firstly analyzed as well as the influence on the despreading and demodulation performance of the BDS system. en, we carried out the corresponding electromagnetic injection experiment on a certain BDS receiver. e following conclusions have been obtained: (1) e existence of the pulse interference will cause an increase in the bit error rate (BER) of the navigation system, and the BER is proportional to the duty cycle and the interference power
Summary
The Beidou Navigation Satellite System (BDS) independently developed by China has been widely used in military, civilian, and commercial fields. Once the RF interference from frequency equipment or space radiation falls within the working bandwidth of the BDS receiver, it will seriously affect the acquisition and tracking performance of the receiver, reduce positioning accuracy, and even cause the satellite tracking loss [1,2,3]. E current researches mainly focus on the influence of RF interference on the quality of the navigation signal and the performance of acquisition and tracking [4,5,6,7,8,9,10]. In [13], the tracking error envelope of the coherent delay phase-locked loop is derived, and the performance of the receiver under the combined action of multipath interferences and CW interferences is studied, which concludes that its comprehensive influence depends on correlator spacing, interference signal frequency, reflected signal delay, and other factors. In [13], the tracking error envelope of the coherent delay phase-locked loop is derived, and the performance of the receiver under the combined action of multipath interferences and CW interferences is studied, which concludes that its comprehensive influence depends on correlator spacing, interference signal frequency, reflected signal delay, and other factors. e above documents are mainly based on theory and simulation analyses and have a significant reference for the research of navigation system performance under interferences
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
