CAJ | 학술논문

针对无线传感网中超宽带信号的多重绕射传播特性，提出一种利用时域一致性绕射理论（ UTD）和物理光学（ PO）的方法。该方法利用一组简单的递推关系来代替一致性绕射理论中复杂的斜率绕射项，从而提供了一种简化的基于时域一致性绕射理论的多重绕射分析方法。利用上述方法推导了著名的Bertoni模型的时域冲激响应，利用卷积运算可以简便地预测无线传感网中超宽带信号的多重绕射传播特性。数值结果表明，这种基于时域UTD－PO的分析方法不仅能够用来准确地分析多重绕射模型而且还能够明显提高运算效率。
침대무선전감망중초관대신호적다중요사전파특성，제출일충이용시역일치성요사이론（ UTD）화물리광학（ PO）적방법。해방법이용일조간단적체추관계래대체일치성요사이론중복잡적사솔요사항，종이제공료일충간화적기우시역일치성요사이론적다중요사분석방법。이용상술방법추도료저명적Bertoni모형적시역충격향응，이용권적운산가이간편지예측무선전감망중초관대신호적다중요사전파특성。수치결과표명，저충기우시역UTD－PO적분석방법불부능구용래준학지분석다중요사모형이차환능구명현제고운산효솔。
The paper proposes a time domain ( TD ) solution based on the uniform theory of diffraction-physical optics ( UTD-PO) to analyze the multiple-wedge diffraction for UWB signals in WSNs , deriving the channel impulse response of the re-nowned Bertoni models .The solution utilizes a recursion relation and does not need to incorporate the slope diffraction in the transi -tion zone.The multiple diffraction propagation characteristics of UWB signals in WSNs can be predicted through a simple operation of convolution , which provides a faster and easier final solution to radio propagation and significantly reduces the computational time.