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The simultaneous bistatic and monostatic Doppler signatures of a small boat are measured and analyzed. The data was recorded using the UCL NetRAD 2.4 GHz netted radar system. Two datasets are presented: one at small bistatic angle (∼ 4°) and the other at a larger angle (∼ 91°). There was little difference between the monostatic and bistatic channels in the former, while there were significant differences...
Many software packages support scientific research by means of numerical calculations and specialised library calls, but very few support specific application domains such as signal processing at the symbolic level or at problem formulation. Translation from the natural domain-specific structure of problem description to the computer formulation is often a time consuming and error-prone exercise....
In this paper the preliminary results on bistatic MTI activities conducted at Fraunhofer FHR are presented. In particular, the bistatic experiment conducted in November 2010 is described which involved the use of a stationary transmitter and of the multi-channel system PAMIR [1] mounted on the Transall aircraft acting as moving receiver. Main challenges of the considered bistatic configuration such...
Non-coherent detection of Gaussian targets (Swerling II targets) in the K-distributed clutter environment is investigated. The optimal detector is derived based on the Neyman-Pearson principle. It is shown to be the well-known square-law detector in the domain of multi-pulse process. Temporally correlated clutter provides a target gain, and improves detection. The higher the temporal correlation,...
Passive Radar systems present a novel approach to airspace surveillance. They use the target illumination by third-party transmitters, e.g. FM radio or TV broadcast stations, for air target detection and localisation. Due to the great number and wide frequency spacing of available transmitters the resulting multistatic and multiband illumination of air targets can be used to reliably obtain a wide-area...
In the traffic accidents in intersection at night, the probability of dying is 2.9 times higher than at daytime. Therefore, the wide area monitoring using by all-weather radar to the reduction of traffic accidents is essential regardless of day or night. In this paper, we study on the state estimation of a moving radar target in intersection environment by 26GHz automotive radar.
A recent study suggested that passive radar processing could be performed adequately using data which had been digitised using fewer bits per sample than are typical of an analogue-to-digital converter (ADC). It is known that passive radar output is improved by preprocessing both surveillance and reference channels. This study examines how quantisation of a real data set affects the ability of preprocessing...
This paper analyses the CFAR performance of the Normalised Adaptive Matched Filter (NAMF) when the estimate of the covariance matrix used to design the filter does not match the clutter in the cell under test. The analysis results are compared with simulations and the potential effects on practical detectors are investigated using a recently developed model for the non-stationary Doppler spectra of...
Because of its low detection accuracy, inaccurate height-finding, and discontinuous airspace coverage, the meter-wave radar has been replaced by common microwave radar progressively in the development course of radar. However, for the threat from stealth aircraft, the meter-wave radar has unique frequency-band advantage. Combined with the research work of many years, the author makes an introduction...
The application of polarimetric techniques to bistatic SAR data is a topic of current research interest. The Australian Defence Science and Technology Organisation's Ingara multi-mode imaging radar system has previously collected a sizable set of X-band fine-resolution multi-polarimetric bistatic SAR data for research purposes. This paper presents results from a preliminary bistatic polarimetry investigation...
This paper applies a recently developed sea clutter Doppler simulation model to five sets of data selected from the CSIR 2007 sea clutter database. Each dataset is characterised using the parameters required for the new simulation model. These parameters are then compared between datasets, before the model is then used to generate spectra for each dataset. The effectiveness of the model is discussed...
Track-Before-Detect has been shown to offer significant sensitivity improvements over point-measurement tracking. However, it uses the whole sensor intensity map as a measurement and it can be infeasible to communicate these maps around a distributed network. This paper investigates the degradation in detection and estimation performance when lossy compression is used to limit communication bandwidth.
Radio frequency (RF) signal intercept systems, such as electronic support (ES) receivers, are inherently wideband by design to provide spectral surveillance over a wide frequency range. To meet both sensitivity and frequency coverage requirements, a digital channelised receiver architecture, such as that proposed in [1], is very attractive. An improved channeliser-synthesiser architecture, which provides...
One of the major issues in testing Automatic Target Recognition (ATR) systems lies in having a sufficient amount of trusted data to be able to estimate efficiency and reliability of the developed algorithms. Generally synthetic data is used because real world data is not easy to obtain or too expensive for academic research. This paper describes an original low-cost automatic acquisition system designed...
This paper describes the development of a novel radar system acting as a virtual target to assist in the training of a marksman. It provides the miss distance of a bullet from an aim point in two axes as the bullet passes through the target plane. Initial work indicates that a low-cost solution can achieve millimetre-level accuracy irrespective of projectile velocity over a wide range of environmental...
Returned radar signals and interference at low elevation angles may be subject to multipaths with both specular and diffuse reflections. For a multichannel phased array radar, space/time filtering techniques may be utilized to enhance the signal to interference ratio for improved target detection. This relies upon a combination of temporal decorrelation and spatial separation and exploits the presence...
A ship detection system for use with RADARSAT-2 dual-polarisation multi-look imagery is described. The system is built using the Defence Science & Technology Organisation's (DSTO) automated target detection software system known as the Analysts' Detection Support System (ADSS). The ADSS is flexible and allows the combination of many different modules in parallel as well as sequential pipelines...
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