Influence of receiver/transmitter motion direction on the correlational and spectral signal properties

Measurement results show that the motion direction of objects has a significant effect on the deformation of the autocorrelation function (ACF) and the power spectrum density (PSD) of the received signals. However, this fact is not included in the analysis of these characteristics previously presented in the literature. In this paper, ACF and PSD are presented as a function of the receiver (Rx) / transmitter (Tx) motion direction. The basis for evaluation of ACF and PSD changes are following parameters: coherence time, average Doppler frequency shift, rms Doppler spread, asymmetry factor of PSD. For simulation study, the Doppler multi-elliptical channel model is used. The test scenario is developed on the basis of the selected measurement, which is described in the literature. The obtained results give the opportunity to assess the relationship between ACF and PDS parameters and the motion direction of Rx/Tx.