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In this paper, we mainly discuss projection approximation and subspace tracking of deflation(PASTd) for direction of departure (DOD) and direction of arrival (DOA) tracking multiple targets in bistatic multiple-input multiple-output (MIMO) radar. The research on DOD and DOA tracking of moving targets in bistatic MIMO radar has been reported rarely. This proposed algorithm can obtain signal subspace...
In this paper, we explore the potential of networked microphone arrays for multiple target tracking. Tracking is accomplished by using the direction-of-arrival (DOA) estimates of multiple microphone arrays. Each microphone array obtains the DOA estimates by using the wideband extensions of the multiple signal classification (MUSIC) technique. Based on these DOA estimates, multi target tracking is...
This paper reports an adaptation of the GM-PHD filter for ground moving target tracking. In particular, a technique for modeling the measurement covariance matrix adaptively based on the signal power of each detection is investigated. This technique is compared to the standard method of using a fixed covariance matrix both by simulation and experimental data. Notably, the analysis of the error distribution...
This paper deals with the joint TOA/DOA (time of arrival/direction of arrival) estimation and tracking of UWB source. The TOA and DOA of the moving target were estimated with the low complexity array processing, then, a particle filter was presented to accurately track the target's real-time location and velocity. This tracking method is effective to the in door UWB non-Linear/non-Gaussian systems...
This paper describes an RF source localization and tracking system using an 8-element uniform circular array. The system is capable of precise RF source localization, fast target recognition and discrimination, fast spectral sensing, real-time processing for location tracking, and the suppression of jamming and multi-path signals. Existing systems and technology for precision location and tracking...
The estimation of the direction of arrival (DOA) of signals in the far-field of an array has been an area of continued research. Recent advances in MIMO radar techniques have led to results whereby prior knowledge of the approximate target locations is used to generate arbitrary signals which are transmitted from an active array to improve DOA estimates. This would be a useful in a scenario such as...
We consider an ad hoc indoor device tracking problem where a user device has no knowledge of map and infrastructure. Since it does not have any information of reference points, the user device finds relative location of its target device. In fact, relative location, which can be described by direction and distance, is sufficient for the user device to track and approach the target device. However,...
This paper deals with the problems of estimation of directon of arrivals (DOA) and tracking of the ultra-wideband (UWB) signals. The UWB pulse position modulation signals from the moving targets incident on antenna elements in the presence of white Gaussian noise, a frequency domain MUSIC algorithm is proposed to estimate the DOA of the multiple moving targets. A robust algorithm based on the extended...
In this paper, we propose a multi-frequency array structure that achieves accurate target localization in a multipath environment. The use of multi-frequencies enables decorrelation in the array to operate direction-of-arrival (DOA) estimation for coherent arrival paths, whereas the spatial filtering of the signals makes the paths separable for robust range estimation. Multi-frequency radar techniques...
In this paper, we present a bearing-only on-line target localization platform, and succeed to realize the whole process of target localization. In the experiment, five nodes are used to send their moving target bearing line data to a base station which adopts asynchronous pseudolinear (APL) estimator for localization. The performance of Direction-of-arrival (DOA) estimation is analyzed in both cases...
In the presence of sea-surface multipath, it is difficult to estimate the direction--of--arrival (DOA) of target for the low-angle tracking problem due to the interference between the direct path and the specular path. We can apply the method of array signal processing to reduce the multipath effect. In this paper, a series of measures are adopted to eliminate the correlation, so one can distinguish...
Most methods of angular estimation for unresolved targets are based on Swerling II targets model. These methods rely upon the use of pulse-to-pulse frequency agility. In this paper we consider the case that the fluctuation of targets observed are slow, research how the RCS fluctuation of targets affects monopulse radar system and then we address a method of resolving two unresolved targets based on...
Tracking of helicopters or any airborne targets requires estimation of both azimuth and elevation angles of the target. In this paper, an algorithm for estimation of azimuth and elevation using acoustic array (array of microphones) will be presented. There are several super resolution algorithms for estimation of direction of arrival (DoA) angles, such as minimum variance distortionless response (MVDR),...
A new neural network DOA estimation technique based on subarray beamforming is proposed. The proposed technique improves previously reported modified neural multiple source tracking algorithm (MN-MUST). MN-MUST algorithm has three stages, the new technique replaces the first two stages of it with a new beamforming stage based on subarrays. The whole direction of arrival angular region is divided into...
The problem of localization and tracking of GMTs (ground moving targets) is investigated based on measurements of TDOA (time-difference of arrival) and DOA (direction of arrival) for which the measurement noises are assumed to be independent and identically distributed (i.i.d.). The problem of the constrained linear MMSE (minimum mean-squared error) estimation is formulated by employing the pseudo-measurement...
An individual sensor's information output is often insufficient for an application, with ambiguities that require refinement or corroboration by fusion with information from other sensors. Fusion of multiple information sources is performed to create an information product of higher quality of information (QoI) that supports more effective intelligence, surveillance, and reconnaissance (ISR). In this...
A novel adaptive signal subspace transformation for direction-of-arrival (DOA) estimation of wideband sources in the near-field is proposed in this paper. The method is composed of two transformations: signal subspace focusing (SSF) and far-field transform (FFT). SSF aligns the signal subspaces for different frequencies in the bandwidth of the sources based on focusing matrices. FFT transforms the...
Rejection of interfering jamming signals using phased arrays with a large number of elements requires the use of randomly spaced subarrays for computationally efficient FPGA implementation. Now we extend this concept to monopulse radar for target angle estimation using sum and difference channels. For estimating target elevation and azimuthal coordinates, sum and difference channels are required for...
The maximum a posteriori penalty function (MAP-PF) approach is applied to three-dimensional (3D) target position tracking of multiple wideband sources using multiple distributed sensor arrays. The track estimation problem is formulated directly from the array data using the maximum a posteriori (MAP) estimation criterion. The penalty function (PF) method of nonlinear programming is used to obtain...
In this study cylindrical microstrip patch array modified neural multiple source tracking algorithm (CMN-MUST) is proposed. CMN-MUST implements previously reported modified neural multiple source tracking algorithm (MN-MUST). CMN-MUST algorithm uses the advantage of directive pattern of microstrip patch elements by considering only a part of array elements for a chosen sector. This reduces neural...
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