Collapsing buildings are, while not exactly common, still an issue. The causes are diverse and often region dependent. most common cause of the large-scale structural failure is earthquakes. In countries less affected by earthquakes, explosions caused gas leaks leading cause.

In this work a system is proposed that utilizes an unmanned aerial vehicle (UAV) to search and rescue trapped victims using their mobile phones. The systems consists of two parts, ground station (GS) airborne (AS). GS provides downlink the UAV, GSM base along with antenna equipment network jamming device. By smart approach block synchronization sequences all stations in range, phones be located are switching emergency fallback mode. mode connect strongest thus one provided by GS. initiating...

Mobile phone localization of buried victims in quick response search-and-rescue (SAR) operations require control over the radio network. To gain via emergency fallback procedures, jamming valid base stations range is necessary. This publication introduces concept and realization a LTE system, that can mask specific by cell-specific reference signal. The selected method allows low-power operation jammer for portable use.

Minimizing the time it takes to locate and rescue victims from building collapses is critical for their survival chance. This scenario causes a challenging environment radio frequency based localization. paper introduces direction finding system on 3x3 uniform rectangular array with integrated polarization switching multipath mitigation intended search applications. It shown that utilizing two polarizations can be used reduce or eliminate ambiguities caused by propagation. Further approaches...

Collapsed buildings are a common occurrence after earthquakes, but also commonly caused by gas explosions. The survival chance of buried victims is heavily dependent on the time it takes to locate and rescue them. This paper introduces 9-channel phase coherent receive system intended for direction finding in search applications. motivation this minimize necessary phones victims. design consists an FPGA based digital with high speed I/O data acquisition signal processing, as well nine...

Abstract. This publication introduces a low-cost vector network analyzer with very large frequency range made of commercial off-the-shelf components. It utilizes two identical receivers and directional bridges to allow for fully bidirectional measurement ports. The design surpasses the performance competing analyzers in regards dynamic range, span calibration capability.

Systems that rely on high-level software share the same disadvantage. Their execution time is unknown and thus result of processing not available after a deterministic delay. The valid for software-defined radios. When only in receive (RX) mode impact varying delay negligible most time. However, case SDR needs to transmit (TX) this prevents from synchronizing TX RX. This crucial many applications communication sensing though. publication proposes implements method low-cost transceiver,...

This paper presents a simple, low-cost synchronization system based on Sub-GHz of-the-shelf transceiver. It is intended for between base station and mobile measurement search rescue applications. Time critical scheduling information can be transmitted together with triggering pulses. Additionally, during off time bulk data transmitted. The allows known latency standard deviation below 200 ns.