Novel Ray-tracing Received Power Adjustment Approach Based on the Ratio of Wavelength and Object Size

In this paper, the received power calculated using ray-tracing simulations is compared with measurement data obtained in a factory environment. In order to reduce the errors of the ray-tracing received power at sub-6 GHz frequencies due to the wavelength being larger than many objects, a novel method to adjust the power of reflected and diffracted waves based on the wavelength and the dimensions of the objects is proposed. Through cross-validation of the proposed method at 922 MHz and 4.85 GHz frequency bands, the median absolute error of the ray-tracing received power value could be reduced from 9.7 dB and 4.1 dB to 4.6 dB and 2.2 dB for each frequency band respectively.