モノパルス波による地下空気層のケプストラム検出

抄録

A calculation method of propagation characteristics and the cepstrum analysis of reflected waves are discussed for monopulse wave traveling perpendicularly to the multi-layered dielectric structure. The aim of this research is to detect the position of the air layer by processing the received underground radar signal. Using the cepstrum method, the received radar signal is decomposed into elementary reflected waves, when radar signal is composed of many waves passing through different paths due to reflection of transmission which occur at boundaries around the target.
By uses of the delay time of the elementary reflected waves, the position of the target hidden in invisible medium is estimated. The effects of the bandwidth of the antenna and random noise at the received signal on the cepstrum are discussed. An example of application of the cepstrum method to the experimental data of concrete, air layer and wet soil is also shown.