Description  Claims  Drawing  Cited references 

WO02082687A1   [0014] 
EP1109331A2   [0014] 
JP2009229649A   [0198] 
JP2010086141A   [0198] 

R1-091772: Reference Signal structure for LTE-Advanced UL 15 SU-MIMO, 3GPP TSG RAN WG1 Meeting #57   [0014]