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This paper is concerned with the modeling problem of route-based motions. A typical route-based motion — straight-line motion — is modeled. Distinct from the conventional bottom-up strategy of the general motion modeling, the proposed modeling adopts a combination of top-bottom and bottom-up strategies. The process noises of the route-based motion model is discovered to be negatively correlated rather...
The OTHR (over-the-horizon radar) based tracking methods have a common prerequisite that the virtual ionospheric height, as the key ionosphere state, should be obtained either by ionosondes or external sources. However, ionosondes can not be deployed arbitrarily and external sources may not be always available, which results in the situation that the ionosphere state is unknown. This motivates us...
In air traffic control (ATC), aerial vehicles normally travel within scheduled route channels with certain probabilities. Exploitation of the probability-constrained route information intuitively will lead to enhancement of tracking accuracy and tracking continuity. This paper presents an ATC tracking approach by incorporating such information to improve the estimation performance accordingly. First,...
In over-the-horizon radars (OTHRs), the target state updates at a fast rate while the ionosphere state (e.g. the ionospheric height) evolves intermittently and all OTHR based tracking methods have the same prerequisite that the virtual ionospheric height, as the key model parameter in estimating the target state, should be obtained either by ionosondes or external sources. However, ionosondes can...
This paper addresses the problem of multi-static doppler-only tracking in doppler blind zone (DBZ). In such a problem, target measurements are suppressed when the rangerate (doppler) drops below a specified threshold in magnitude (the minimum detectable velocity, MDV). Moreover, tracking using doppler-only measurements is not an easy problem due to its weak observability. In order to improve the estimation...
The three-dimensional CMKF-U with only position measurements is extended to solve the nonlinear tracking problem with range-rate measurements in this paper. A pseudo measurement is constructed by the product of range and rangerate measurements to reduce the high nonlinearity of the rangerate measurements with respect to the target state; then the mean and covariance of the converted measurement errors...
Target tracking of sky wave OTHR inevitably faces the problem of multiple propagation modes, through modeling target movement in ground coordinate and implementing data association in radar coordinate, a multipath viterbi data association (MVDA) algorithm is proposed, which extends viterbi data association (VDA) from association between measurement and track to association among measurement, propagation...
In this paper, a data preprocessing method for sky-wave over-the-horizon radar (OTHR) track initiation using two-hierarchical 2D Hough transform is proposed. We firstly use range-time data space to hierarchical I Hough transform and obtain rough candidate measurement sequences, where Doppler is used as an accumulation constraint; then we use the corresponding azimuth and time measurements to hierarchical...
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