Interference Suppression Strategies for Trunking Communication System in TD-SCDMA Network
Shu Peng · Video Engineering · 2011
The trunking systems based on TD-SCDMA network are limited by the interference that users create for each other.Several methods of controlling and suppressing the interference through beamforming,multiuser detection and power control are adopted.Conventional power control algorithm can′t eliminate adjacent group interference.In this paper,the beamforming to suppress the interference outside the main lobe is used,then the joint detection of multiple groups to remove both intra-group and inter-group MAI in the lobe for the uplink receiver are used,thus reducing system requirements on power control,the performance has been improved.Simulation proved that the algorithm can effectively reduce transmission power and suppress the interference in the system.