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Postdisaster search and rescue is an important application of ultra‐wideband radar system, which mainly detects survivors by their respiratory‐motion response. In the application of detecting multiple human targets, owing to faint amplitude of human chest movement and high attenuation of electromagnetic wave, the motionless living human targets cannot be discriminated accurately, especially in a complex...
Recently the increasing anti-terrorism and disaster rescue operations underscore the requirement for effective detection and recognition of finer-grained human activity. Currently, the most effective technology is usually realized by exploiting time-frequency analysis to extract the micro-Doppler (MD) signature difference formed by different parts of the body movement. However, for inherently nonlinear...
Due to the complexity of ruin scenes in the post-disaster search and rescue operations, the UWB echo signal reflected from the human target is often contaminated by the clutters and noises from the surrounding environment, which makes it difficult to extract the chest-wall micro-motion information that indicating the presence of human target, causing misjudgment and leakage. Thus, it remains as a...
Doppler radar has been used to search survivors buried under earthquake rubble by contact-free detection of respiration signals. However, the respiration signals were minute and easy to be polluted by noise from moving-object around the survivor such as swing of flowers, leaves and bushes. In order to restrain the noise and improve the signal-to-noise ratio (SNR), the Adaptive Line Enhancer (ALE)...
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