SCHEDULING METHOD WITH ZERO-FORCING BEAMFORMING IN MIMO WIRELESS SYSTEMS

摘要

The present invention relates to a plurality of limited radio resources when the user is present in the MIMO system for transmitting and receiving signals between a plurality of transmit antennas and multiple receive antennas to a scheduling method for efficiently assigned to each user. ; A plurality of transmission antennas, and by from MIMO (MIMO) each transmission whenever a plurality of users at the transmitting end the system for transmitting and receiving signals between a plurality of receive antenna selection for the user of the above by the plurality of the number of transmission antennas zero-forcing beamforming (zero use -forcing beamforming) and at the same time transmitting a signal. Using a greedy method (greedy method) has a low complexity of it as possible in reality level when selecting the user with information about the time state of the channel at the transmitting end by selecting a user having the orthonormal one (orthonormal) channel vector and it transmits the data. ; According to the present invention while the limited radio resource by using the scheduling algorithm with the complexity of the possible practical implementation level evenly distributed to each user it is possible to improve the transmission capacity of the entire system at the same time. ; Scheduling, for MIMO, MIMO, zero-forcing beamforming