Ultra-wideband double vertical knife-edge model for obstruction of a ray by a person

We present a novel simple analytical model for the shadowing caused by a person that moves through an ultra-wideband ray. The model uses two vertical knife-edges plus phase and amplitude correction terms to determine the loss caused by the person at different perpendicular distances to the ray. In conjunction with the personpsilas trajectory the time-dependent shadowing loss can be determined, thus proving a building block for time-variant ultra-wideband channel models. The model is derived from channel measurements in the range from 4 to 10 GHz. On comparison with the measured data, we find that the proposed model provides good results in particular for low elevation angles between transmitter and receiver.