微区电波传播特性分析模型多是理论模型，采用射线追踪法，对源辐射情况进行模拟。
Most propagation models , which can be adapted micro cellcluar are theory method based on ray tracing method.
数值模拟和试验研究表明LTI改进算法是一种有效的射线追踪方法，能追踪回波，适合复杂对象的层析成像。
Numerical simulations and experiments show that improved algorism of LTI is effective to trace rays including back waves and suitable for computerized tomography to complex object.
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