Target tracking enhancement using a Kalman filter in the presence of interference

Abstract

In this paper we present a new target tracking enhancement system that uses a Kalman filter in the presence of interference. If the radar (seeker) is affected by different types of interference, this will affect the missile trajectory towards the target and may cause inaccurate tracking. In the new system a six-state Kalman filter is utilized to perform the tracking task and to carry out smoothing to the corrupted trajectory. This also provides good information about the target velocity in three dimensions which is very important information about the target. A three dimensional scenario between target (with high manoeuvre) and missile is used to illustrate the performance of the system in the case when (i) no interference is present and (ii) interference is present. The performance of the filtered trajectory using the Kalman tracker will be assessed for different guidance methods: including (i) proportional navigation (ii) pure pursuit and (iii) constant bearing. The Kalman improvement for the tacking for the three guidance method will be analysed.

Three-Dimensional Target Tracking Based on Velocity Pursuit

“…Based on [8], the differential equations for the range, the pitch angle of PT and the yaw angle of PT are…”

“…Different from the study of [4] and [5], the three-dimensional scalar kinematic equations given in [8] are applied to design the control strategy of tracking. Based on the study in [7], a surveillance problem of intercepting and maintaining the target at constant distance from the moving pursuer will be further considered in the three-dimensional space.…”

Fractional Fourier transform based monopulse radar for combating jamming interference

“…The start time start T depend on the target range t R . The mathematical model for the received signal (target chirp signal plus the additive jamming signal) assuming no system degradation) [3] is:…”

“…They provide superior angular accuracy and less sensitivity to fluctuation in the radar cross section (RCS) of the target compared to other types of tracking radars [2]. These radars are affected by different types of interference which affects the target tracking process and may lead to inaccurate tracking [3][4][5].…”

A new Fractional Fourier Transform based monopulse tracking radar processor

“…Monopulse radars are commonly used in target tracking as they provide superior angular accuracy and less sensitivity to fluctuation in the radar cross section (RCS) of the target compared to other types of tracking radars. However, monopulse radars are affected by different types of interference which affects the target tracking process and may lead to inaccurate tracking [1]. When more than one target exists in the monopulse radar half power beam width the resultant distortion due to this interference will affect the induced target error voltage and consequently the radar tracking ability.…”