Millimeter-Wave Propagation Measurement and Simulation in a Indoor Office Environment at 28 GHz

In this paper, we investigate the propagation characteristics of millimeter wave (mmWave) channel for directional antenna patterns in a indoor office for line-of-sight (LOS) conditions, based on extensive measurements conducted in a indoor office environment using a stationary linear track at the receiver to move the horn antenna, with a carrier frequency of 28GHz. Propagation characteristics of mmWave at 28 GHz are simulated and analyzed using the method of shooting and bounding ray tracing/image (SBR/IM). The ray tracing predictions agree fairly well with the measurement results, so the correctness of the SBR/IM method has been validated. Moreover, some propagation characteristic parameters are discussed for measured results and simulated results, such as values of the path loss, the distribution of the received power. Meanwhile, path loss exponent is deduced from the measurement investigations. The analysis of the above results from this measurement and simulation may be utilized for the design of the future fifth generation (5G) mmWave indoor cellular systems.