On the Doppler power spectrum at the mobile unit employing a directional antenna
Chang Qing Xu, Choi Look Law, Susumu Yoshida · IEEE Communications Letters · 2001
The effects of directional antennas at the mobile unit on the Doppler power spectrum are investigated. The Doppler power spectral density (PSD) functions at the mobile unit employing a directional antenna have been derived and presented. These Doppler PSD functions were derived for both the omnidirectional and directional antenna cases at the base station.