公开(公告)号：EP1568155A2

公开(公告)日：2005-08-31

申请号：EP03783078.3

申请日：2003-10-29

申请人： Nokia Corporation

发明人： MUKKAVILLI, Krishna Kiran ,  SABHARWAL, Ashutosh ,  AAZHANG, Behnaam

IPC分类号： H04B7/14 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04B7/0639 ,  H01Q21/00 ,  H04B7/0443 ,  H04B7/0617 ,  H04B7/0669 ,  H04W52/42

摘要： Beamforming systems having a few bits of channel state information fed back to the transmitter benefit from low complexity decoding structures and performances gains compared with systems that do not have channel state feedback. Both unit rank and higher rank systems are implemented. Substantial design effort may be avoided by following a method of using functions formulated for space-time systems with the change that the channel coherence time is equated to the number of transmit antennas and the number of antennas in the space-time formulation is fixed at one.