Spatial and Temporal Characteristics of Multipaths in Indoor Environments

Abstract

It is well known that multipaths are clustered in time in indoor environments. Characterization of angle of arrive is especially important for multiple-input multiple-output (MIMO) communications systems. To characterize the angle of arrival of radio signals, we propose to use the ray-tracing method. Ray-tracing method is intrinsically angle-of-arrival oriented. This paper presents simulation results of angle of arrival for an office environment. It is found that the ray distribution vs. angle-of-arrival has two peaks: one corresponds to the direction from transmitter to receiver, while the other corresponds to the opposite direction.