论文标题
用于SBR的射线跟踪通道建模的改进的等应分裂算法
An Improved Equiangular Division Algorithm for SBR based Ray Tracing Channel Modeling
论文作者
论文摘要
与基于图像方法（IM）的射线跟踪（RT）相比，射击和弹跳射线（SBR）方法的特征在于快速速度，但精度较低。在本文中，提出了一种基于等应分裂的迭代精确算法，以使粗略的路径准确，从而使SBR计算精确的通道信息。比较不同的射线启动方法以获得更好的启动方法。通过使用等应分裂，与当前等距分裂方法相比，发射器（TX）更均匀地发射射线。通过提出的迭代精确算法，出发角度（AOD）和到达角（AOA）的误差低于0.01度。还给出了迭代次数与误差减少之间的关系。可以说的是，通过比较路径的功率延迟曲线（PDP）和角度分布，该提出的方法具有与IM相同的精度。这可以解决SBR的较低准确度的问题。
Compared with image method (IM) based ray tracing (RT), shooting and bouncing ray (SBR) method is characterized by fast speed but low accuracy. In this paper, an iterative precise algorithm based on equiangular division is proposed to make rough paths accurate, allowing SBR to calculate exact channel information. Different ray launching methods are compared to obtain a better launching method. By using equiangular division, rays are launched more uniformly from transmitter (Tx) compared with the current equidistant division method. With the proposed iterative precise algorithm, error of angle of departure (AOD) and angle of arrival (AOA) is below 0.01 degree. The relationship between the number of iterations and error reduction is also given. It is illustrated that the proposed method has the same accuracy as IM by comparing the power delay profile (PDP) and angle distribution of paths. This can solve the problem of low accuracy brougth by SBR.
