公开(公告)号：EP0883936A1

公开(公告)日：1998-12-16

申请号：EP97916810.0

申请日：1997-03-24

申请人： STANFORD TELECOMMUNICATIONS, INC

发明人： NATALI, Francis ,  OHLSON, John

IPC分类号： H04B1 ,  H04B7

CPC分类号： H04B1/7077 ,  H04B7/216 ,  H04B2001/70935

摘要： A spread spectrum CDMA communication system in which a station transmits a short synchronization signal to allow a second station to (1) recognize that a signal is present, (2) resolve frequency uncertainty, (3) acquire the spreading code timing, (4) acquire frame and symbol synchronization, and (5) demodulate data which may contain user identification and other data. The rapid acquisition channel (RAC) includes a burst signal comprising of an Acquisition Field during which the carrier is biphase modulated with a pseudo-noise (PN) sequence, a Sync Field during which a synchronization sequence is mod-2 added to the PN sequence with one chip of the sync sequence equal to one or more periods of the PN sequence, and a data field with m-ary orthogonal code words mod-2 added to the PN sequence with one chip of the code word equal to one or more periods of the PN sequence.

公开(公告)号：EP0883936B1

公开(公告)日：2004-01-07

申请号：EP97916810.1

申请日：1997-03-24

申请人： STANFORD TELECOMMUNICATIONS, INC

发明人： NATALI, Francis ,  OHLSON, John

IPC分类号： H04B1/707 ,  H04B7/216 ,  H04B7/26

CPC分类号： H04B1/7077 ,  H04B7/216 ,  H04B2001/70935