M. Cherniakov

Space-surface bistatic synthetic aperture radar - prospective and problems

The paper introduced a feasibility analysis of a synthetic aperture radar (SAR) with novel architecture. Two essential peculiarities are discussed: the system configuration with a moving transmitter when the receiver is stationary and noncooperative transmitters utilization for the system. The system is named space-surface BSAR or S-SBSAR. The system analysis confirms its feasibility. S-S SAR could find numerous applications where an observation area of /spl sim/20-30 km relevant to the receiver is acceptable. S-SBSAR space resolution corresponds to the general approach to BSAR when the resolution degradation due to a non-optimal satellite-targets-receiver geometrical position could be resolved using the satellites diversity.

The concept of a forward scattering micro-sensors radar network for situational awareness

The concept of a novel forward scattering micro-radar wireless network for ground targets detection and recognition is presented. The system topology and structure are described first, followed by a summary of the systempsilas capabilities and applications. Signal processing strategies used for target detection, parameter estimation and automatic target recognition are briefly explained and supported with experimental results.

Direct path interference suppression in bistatic system: DTV based radar

Over the past 20 years, bistatic radar has been an emerging technology. One of the major problems in continuous wave bistatic radar is the direct path interference (DPI). The reflected signal from the target is received at the background of this interference; the target would be buried under the sidelobes of the DPI in the receiver circuit. The conventional solution to this problem is the use of an adaptive antenna, steering a null towards the interference. Unfortunately, this technology is most effective in quasi-stationary receivers. For surveillance radar, the null depth obtained is not enough. This paper proposes a new technique of DPI suppression, based on dynamic compensation. Some aspects of cross-polarisation isolation between the transmitter and receiver is also considered.

Space surface bistatic SAR with space-borne non-cooperative transmitters

This paper presents research results in space-surface bistatic synthetic aperture radar (SS-BSAR) with GNSS non-cooperative transmitters. The experimental-setup used to study the SS-BSAR is described. The signal processing algorithm that will be used to process the data collected from SS-BSAR is also discussed

Forward scattering micro sensor for vehicle classification

In this paper we present results in studies into the use of forward scattering radar and SISAR (shadow inverse synthetic aperture radar) micro-sensors for vehicle classification. A number of experiments that represent non-ideal scenarios are introduced and the results show that the proposed system does provide a viable classification system. We also studied the performance of the system when a network of sensors is used. Two scenarios of network deployment were tested and in both cases classification performance improved when compared to a single sensor system. In this paper, we used a single carried frequency to obtain both database and for classification. Further work is being currently carried out to study the effect of using different carrier frequencies on system performance.

Ambiguity function for bistatic SAR and its application in SS-BSAR performance analysis

The ambiguity function (AF) for bistatic synthetic aperture radar (BSAR) is deduced and the performance of space-surface bistatic SAR (SS-BSAR) is analyzed. SS-BSAR can operate utilizing non-cooperative transmitters such as GPS, GALILEO, etc due to its bistatic nature.

Analysis of forward scattering radar for ground target detection

This paper describes aspects of ground target detection using a forward scattering micro radar (FSR). It begins with a brief description of the system, followed by a more detailed analytical study of FSR in terms of power budget analysis and potential cross-range resolution. From this analysis, theoretical models are constructed and compared to the experimental data

UWB signature analysis for detection of body-worn weapons

Presented work is dedicated to the study of innovative principles, which can be used for the remote detection of concealed, body-worn weapons & explosives (CW&E). The approach is based on the analysis of the late time response (LTR) of the human body illuminated by a UWB signal: if CW&E are attached to the body it will essentially influence the LTR characteristics. A set of LTR parameters represents the unique signature of target. Our aim here is to demonstrate the ability of the developed approach to extract and to interpret the signature. In order to validate a feasibility of the approach analytical consideration, full-wave modeling and initial experiment have been implemented and results have been compared

Maritime UWB forward scattering radar network: Initial study

A scenario for an ultra-wideband (UWB) forward scattering radar (FSR) network for detection of low radar cross section (RCS) maritime surface targets is suggested. A chain of buoys equipped with transceivers which forms a FSR for target detection is considered. In this paper, the first stage of the study is described and major aspects of future work are discussed. It was shown that the high level of surface clutters related to FSR might be reduced by utilisation of UWB technology. As a preliminary further investigation, a numerical simulation of the 3-D RCS for comprehensive models of small maritime targets is obtained and comparisons with simplified target models are made.

Multistatic Forward Scatter Radar for accurate motion parameters estimation of low-observable targets

This paper introduces the MIMO Forward Scatter Radar (FSR) concept to provide an accurate estimation of the motion parameters of a low observable target. In particular, two techniques are introduced to obtain the estimate of the target velocity component normal to the TX-RX baseline, that exploit the multiple transmitters and receivers. Experimental results allow the comparison of the efficiency of the two approaches and demonstrate the potential of MIMO FS configuration.