郭嘉琦,赵友平. 一种射线跟踪信道仿真的电磁参数选取方法[J]. 电波科学学报,2022,37(1):99-105. DOI: 10.12265/j.cjors.2020260
      引用本文: 郭嘉琦,赵友平. 一种射线跟踪信道仿真的电磁参数选取方法[J]. 电波科学学报,2022,37(1):99-105. DOI: 10.12265/j.cjors.2020260
      GUO J Q, ZHAO Y P. A method of electromagnetic parameters selection for ray-tracing channel simulation[J]. Chinese journal of radio science,2022,37(1):99-105. (in Chinese). DOI: 10.12265/j.cjors.2020260
      Citation: GUO J Q, ZHAO Y P. A method of electromagnetic parameters selection for ray-tracing channel simulation[J]. Chinese journal of radio science,2022,37(1):99-105. (in Chinese). DOI: 10.12265/j.cjors.2020260

      一种射线跟踪信道仿真的电磁参数选取方法

      A method of electromagnetic parameters selection for ray-tracing channel simulation

      • 摘要: 为了满足未来无线通信中信道建模日益增高的精度需求,针对射线跟踪信道仿真中电磁参数难以准确确定这一实际问题,提出了一种射线跟踪信道仿真的电磁参数选取方法. 该方法利用局部实测的无线电传播信息绘制出无线环境图,基于感知哈希算法快速对比实测与射线跟踪仿真的无线环境图,从而调整仿真环境中的电磁参数使仿真数据逼近测试结果. 针对多种材料构成的反射面,还提出了栅格化处理方法,用以提高信道预测精度. 实验室测试结果表明,使用本文参数选取方法仿真获取的接收功率均方根误差为2.7 dB,误差小于采用材料库查询电磁参数的传统方法误差. 该方法能够避免对于难以测量环境的实测,同时可以更新(或补充)从材料库查询的电磁参数.

         

        Abstract: In order to meet the ever-increasing requirements on high-precision channel modeling for future wireless communications, a method to select the electromagnetic parameters for ray-tracing channel simulation has been proposed, which addresses the challenging practical issue in ray-tracing channel simulation, namely, how to accurately determinate the environmental electromagnetic parameters. In the proposed method, a local radio environment map is firstly constructed with the measured radio propagation data in a small part of the whole simulation area. Then, based on the perceptual hash algorithm, the measured radio environment map is quickly compared against the ray-tracing simulated radio environment map. By adjusting the electromagnetic parameters in the simulation environment, the simulated results get close to the measurement results. For reflective surfaces composed of multiple types of materials, a rasterization method is further proposed to improve the accuracy of channel prediction. The proposed method has been employed to obtain environmental electromagnetic parameters and perform ray-tracing simulation verification. Laboratory test results show that the root mean square error of the received power is 2.7 dB when using the proposed method, which is smaller than that when using the traditional method with electromagnetic parameters querying from the material library. This method can be employed to avoid field measurement, especially for those hard-reaching environment, and can also be used to update (or supplement) the electromagnetic parameters queried from the material library.

         

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