Abstract
Interference multipath is an important factor to affect the anti-jamming performance for the global navigation satellite system (GNSS) antenna array receiver. However, interference multipath must be considered in practical application. In this paper, the antenna array model for interference multipath is analyzed, and an equivalent model for interference multipath is proposed. According to the equivalent interference multipath model, the influence of interference multipath on anti-jamming performance is analyzed from the space only processing (SOP) and space-time adaptive processing (STAP). Interference multipath can cause loss of the degree of freedom (DoF) of SOP. Through analysis of the equivalent model and STAP mechanism, it further reveals how the STAP can solve the interference multipath. The simulation experiments prove that the equivalent model is effective, and the analysis conclusion is correct. This paper also points out that the interference bandwidth is wider and more taps in STAP are required, under the same experiment conditions.
Highlights
Global navigation satellite system (GNSS), represented by global position system (GPS), is a space-based navigation and positioning system, which is widely used in various fields such as land, sea and air navigation, aerospace, geodesy, and other national defense construction and national economy with its full space coverage, all-weather work, and high positioning accuracy [1,2,3]
According to our test experience, for the GNSS antenna array anti-jamming receiver, regardless of the signal quality except for the degree of interference suppression, the test results in the darkroom are often better than the field test results; one of the important reasons is that the multipath effect exists in the field test
We have analyzed the impact on the anti-jamming performance of jammer multipath in GNSS antenna array receivers
Summary
Global navigation satellite system (GNSS), represented by global position system (GPS), is a space-based navigation and positioning system, which is widely used in various fields such as land, sea and air navigation, aerospace, geodesy, and other national defense construction and national economy with its full space coverage, all-weather work, and high positioning accuracy [1,2,3]. According to our test experience, for the GNSS antenna array anti-jamming receiver, regardless of the signal quality except for the degree of interference suppression, the test results in the darkroom are often better than the field test results; one of the important reasons is that the multipath effect exists in the field test. In literature the influence ofradar intersystem appears than navigation system, so some [16], innovations in the ference multipath on the airborne adaptive radar system is analyzed. In literature [16], the influence of interference out that theoninterference multipath affect the signal to interference plus the points noise ratio multipath the airborne adaptivewill radar system is analyzed. We analyze the impact of jammer multipath on anti-jamming performance based on space only processing (SOP) and STAP.
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