The study of the symmetry of multipath parameters

The study of multipath signal is very important in the area of wireless communications. However, the past study mainly focused on how to reduce the influences of multipath on communication signals. In this paper, considering the law of symmetry in information obtaining, the possibility and method of enabling both sides to obtain parameters from multipath signals is presented. Since the parameters which are symmetrical to both sides not only contain the natural information of the channel, but also contain the certainty of both sides, so they are valuable in many fields.