Pseudo-random Coded Pulse Uwb Search And Rescue Radar

It is more and more complex and changeable in modern society. Earthquakes, constructions,mountain bodies, houses caving in, fire, kidnaps, terrorisms sometimes occur. All these are threatening national and people's property security seriously, what is main is people's safety. Occurs at these urban disasters, the public security law enforcement personnel hope that they can fast and effectively locate the criminals in buildings, the search and rescue personnel also hope that they can have a set of effective methods with which they can realizes fast search and localization to rescue person stranded in the thick smoke or the ruined constructions.Great successes have been achieved by the key laboratory of Earth Exploration in Chengdu University of Technology about the research of rescue method by sound wave vibration. What's more, lifesaving instrument has been developed successfully by her. And in this foundation, researchers in the laboratory has begun to pay more attention to the realization lifesaving with the ultra-wide band electromagnetic method and has applied for the country natural sciences fund project "Survey of Ultra-wide band Electromagnetic Method for Urban Disaster Rescue and Life Searching" This paper is an important part of the project.The principle of work of the UWB search and rescue radar system has been introduced in the paper; The main characteristics of the transmitting signal waveform in time domain and frequency domain has been presented in it; design method of UWB search and rescue radar signal and the penetrability of the signal has been discussed in detail; The characteristics of the pseudo-random coded pulse signal has been studied, the pulse compression principle, the design of pulse compressor, the sub-pulse matched filter principle and the design method of it has been introduced, and in this foundation, the simulation design of the pseudo-random coded pulse compressors and the sub- pulse matched filter have been carried on PC; The wide band characteristics of the target of the UWB radar have been studied, more than that, the simulation experimental model in view of the city disaster rescue and the life search has been established.Good conclusions have been drawn based on the fundamental research and computer simulation of the signal model, the target information model, the survey model. First, the penetrability, crosswise resolution, longitudinal resolution, the ability of the target detection and the imagery of the UWB short pulse are decided by the characteristic parameters of it. Next, the short pulses modulated by the pseudo-random code enhance the signal energy...