UWB Reactive Near Field Detection for Smart Packages: A Comprehensive Study Using Eggs

Abstract

Abstract-Detection of packages or storage containers relies heavily on the use of radio frequency identification (RFID) tagging, though such technology provides no means to determine the quantity of items within them. This paper presents a comprehensive study of ultra wideband (UWB) detection in the reactive near field as a low cost, low power way of detecting solid items within a package to complement RFID. For proof of concept, egg boxes within a smart fridge are used as a chosen test case. Simulations and measurements are carried out to evaluate the filtering of the UWB impulse response from which it can resolve the quantity of eggs in a box, using an array of sensors either attached to the package or placed underneath. Correlation coefficients are derived as a metric of this filtering in a reactive near field detection scenario. The robustness of the approach is further evaluated by considering other food cluttered around and above the egg box. The results show smart packages which detect an item directly above the sensor are not affected by surrounding clutter.Index Terms -Reactive near field, ultra wideband (UWB), smart fridge, Internet of things (IoT), pulse filtering

Improved through-wall radar imaging using modified Green’s function-based multi-path exploitation method

“…In the traditional narrowband radar system, it is difficult to separate the original returned signal of target with the those caused by multi-path due to the poor range resolution and the time-delay resolution [5]. Alternatively, ultra-wide band (UWB) through-wall radar systems [6] can provide sufficient range resolution to differentiate the direct and the multi-path returned signal. In the meantime, the multi-path return caused by walls can in turn enlarge the investigation domain and enhance the number of the effective array aperture, if sufficiently separated from the direct return, which motivates the multi-path exploitation method [7].…”