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为了提高多斜率传播模型(包括双斜率和三斜率传播模型)的实用性,以及无线网络规划中传播预测的准确性,提出了一种基于CW(Carrier Wave)测试的多斜率传播模型校正方法。该算法通过多斜率传播模型迭加街区损耗及地物损耗分量将模型扩展,整理成为线性的形式,并将每个分段划分为本地中值分量和随机分量两个部分,采用迭代式线性最小二乘法,在每次迭代中依次求解出两个分量中的各项系数,并引入系数有效性控制以保证校正后模型能够有效使用。通过实验和仿真说明了算法的有效性和合理性,为无线网络规划工程中类似问题的解决提供了借鉴。
In order to improve the practicability of multi-slope propagation models (including dual-slope and triple-slope propagation models) and the accuracy of propagation prediction in wireless network planning, a multi-slope propagation model calibration method based on Carrier Wave (CW) test is proposed. The algorithm spreads the block loss and the ground object loss components by using the multi-slope propagation model, and extends the model into a linear form. Each segment is divided into two parts of a local median component and a random component, and an iterative linear minimum The second-order method solves each coefficient of the two components in turn in each iteration, and introduces the coefficient validity control to ensure that the corrected model can be effectively used. The effectiveness and rationality of the algorithm are illustrated through experiments and simulations, which provide references for solving similar problems in wireless network planning.