Browsing by Author "Binti zulkifli, Safiah"

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    Absence of Presence
    (Cranfield University, 2020-01-10 08:45) Binti zulkifli, Safiah
    The tiny the object, the more difficult it is to detect. Failed to detect does not simply signifies the absence of presence. The object may be camouflage and immersed in this huge world - as this image demonstrates! With a booming micro-drones easily available for all walks of life, it is hugely possible for these drones to perform stealthy surveillance being unnoticeable. But, wait! This fact can be avoidable with a specifically design radar for a micro-size target detection. By extracting micro-Doppler signature which is induced by mechanical vibration or rotation from a target – in this case is the flapping wings enable the presence more significant and visible. It is the time to monitor the usage of this presence to avoid illegal and illicit activities for further exploitation. Full control of the latest technology ensure the harmonic and peaceful environment.
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    Algorithm for Micro-Size Target Detection with Frequency Modulated Continuous Wave (FMCW) Radar
    (Cranfield University, 2018-11-23 09:07) Binti zulkifli, Safiah
    Poster presented at the 2018 Defence and Security Doctoral Symposium.Micro-UAVs of the size of an insect can be used to perform stealthy surveillance or to gather intelligence crucial to attack roles at a relatively short range and within enclosed spaces and buildings. Conventional radar systems have been optimised to detect and classify bigger targets and are not specifically designed to detect micro-targets of less than 5cm in size. Other micro-targets that are relatively small in size are the insect itself. Insect detecting, monitoring and tracking have been a great interest too until now, especially those that can caused harm to the agriculture and wide spread of diseases. It is important to detect at early stage rather than noticed it after the destructive happened. Most entomology radars that are being used now are pulsed signal wave radar, that are less efficient compared to continuous wave radar. A set of MATLAB simulations will be carried out to understand how to extract the Doppler as well as micro-Doppler signatures from these small targets, then to understand what sort of detection range can be achieved with current technology.
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    FMCW radar prototype development for detection and classification of nano-targets
    (IEEE, 2020-06-11) Binti zulkifli, Safiah; Balleri, Alessio
    Detection and classification of nano-targets (less than 5 cm in size) are becoming important technical challenges as nano-targets are largely invisible to conventional radar. Nano-drones, for example, may soon become a tangible threat capable of providing short-range stealthy surveillance. Similarly, insect pests are posing a significant agricultural risk by causing crop losses and subsequently reducing the yields. Frequency Modulated Continuous Wave (FMCW) radar is a technology that can provide short-range detection, with no blind range and very high resolution, at a relatively low cost. This paper presents the latest results of an ongoing project aiming at designing and developing a low-cost and bespoke 24 GHz FMCW radar prototype to enable detection of nano-targets and extract their Doppler signatures. A home-brew S-band FMCW radar prototype has been initially designed and developed, using off-the-shelf components, to demonstrate the feasibility of our proposed design solution and inform all future activities at 24 GHz. Several experiments have been carried out to test the S-band prototype and assess its performance against larger drones and cars. Results have shown targets could be successfully detected and their micro-Doppler signatures extracted using Short-Time Fourier Transform (STFT) techniques.
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    Losing Contact with Nano-object
    (Cranfield University, 2020-01-10 08:53) Binti zulkifli, Safiah
    Micro-UAVs of the size of an insect can be used to perform stealthy surveillance or to gather intelligence crucial to attack roles at a relatively short range and within enclosed spaces and buildings. Conventional radar systems have been optimized to detect and classify bigger targets and are not specifically designed to detect micro-targets of less than 5cm in size. Other micro-targets that are relatively small in size are the insect itself. Insect detection have been a great interest too until now, especially those that can cause damage to the agriculture and wide spread of diseases. Early stage of detection help from further massive destruction to happen. Most entomology radars that are being used now are pulsed wave radars whereas FMCW radar offers a better detection in a closer range target which is less than 150 m to the target. The aim of this research is to develop a radar system to detect insect-like UAVs. Ad-hoc detection will be investigated and developed that can offer improved performance.