关键词: 高频段, 室内无线通信, 短距离, 行人遮挡因素, 路径损耗, 时延扩展

Abstract: To study the channel propagation characteristics of high frequency broadband short distance wireless communication, the wireless propagation characteristics of different indoor scenarios in 11GHz frequency band are measured. Based on lots of measurements, a path loss model with passer-by shielding is established. By the inverse Fourier transform of the measured frequency channel, the power delay profile is obtained, and the statistical characteristic of root mean square delay is presented. In addition, the influences of passer-by shielding on channel propagation characteristics in corridor, classroom and large conference room are compared and analyzed. In the presence of pedestrian, the changes in the position of pedestrian relative to the receiver have an important impact on the path loss, that is, when the pedestrian moves between the transmitter and receiver, the path loss caused by passer-by shielding has a quadratic function relationship with the distance between the pedestrian and transmitter. When the pedestrian is standing, the path loss caused by passer-by shielding and the distance between the receiver and the pedestrian has a negative exponential function relationship, and the influence level of the pedestrian on the path loss will also change depending on the scenario. The above research results can provide theoretical and practical basis for the application of high-frequency indoor short-distance wireless communication in the future.

Key words: high frequency band, indoor wireless communication, short distance, Passer-by influence, path loss, delay spread