Spatial Division Multiple Access with Smart Antennas in TD-SCDMA HSDPA

In this paper, Smart Antennas and HSDPA technology in TD-SCDMA will be discussed. It is demonstrated to be inefficient when they are combined together due to the shortage of channelization code resources. To use Smart Antennas more efficiently in TD-SCDMA HSDPA, one SDMA algorithm with combination of generic schedule algorithms is proposed. With SDMA, the system can allocate same channelization codes to different users who are spatially separable well enough. To reduce the complexity, the algorithm is simplified based on some reasonable scenario. The performances of the simplified algorithm with 3 different common schedule algorithms are evaluated through a system simulator, and the parameters affecting the algorithm are studied. In the end, the simulation results show that the system throughputs can be increased with optimized parameters.