A Multi-Antenna Based Spectrum Sharing for IMT-Advanced SDMA Systems
The authors propose a simple multi-user beamforming to assist Space-Division Multiple Access (SDMA) as well as to mitigate interference from IMT-advanced Base Station (BS) to Fixed-Satellite Service (FSS) Earth Stations (ESs). The BS with multiple antennas forms multiple beams that steer nulls, i.e., emit quite low power (interference) to the directions of the ESs. The beamforming vectors are designed by inverting the array steering vectors corresponding to the direction angles of the ESs as well as random direction angles of the main beam lobes.
Provided by: Science & Engineering Research Support soCiety (SERSC) Topic: Mobility Date Added: Feb 2015 Format: PDF