公开(公告)号：EP0842587B1

公开(公告)日：2002-08-07

申请号：EP97920916.0

申请日：1997-05-28

申请人： Koninklijke Philips Electronics N.V.

发明人： LE MAGUET, Yann ,  LE QUEAU, Marcel ,  LAUER, Ludovic

IPC分类号： H04N7/52

CPC分类号： H04N21/235 ,  H04N21/2365 ,  H04N21/4347 ,  H04N21/435

公开(公告)号：EP1520363A1

公开(公告)日：2005-04-06

申请号：EP03738428.6

申请日：2003-06-13

申请人： Koninklijke Philips Electronics N.V.

发明人： BRAJAL, Americo ,  UNAL SAYRAC, Berna ,  LAUER, Ludovic ,  MORLIER, Céline

IPC分类号： H04J13/04 ,  H04J13/00 ,  H04L5/02

CPC分类号： H04L5/026 ,  H04B2201/709709 ,  H04J13/00

摘要： The invention relates to digital transmission. It particularly relates to a method of transmitting data using multi-carrier Code -division Multiple Access (CDMA) for accessing a transmission system. The method comprises a step of modulating the data to be transmitted using Orthogonal Frequency- division Multiplexing (OFDM) for producing OFDM modulated data symbols and a step of spreading the OFDM modulated data symbols with spreading codes including a set of predefined sequences, wherein the sequences are predefined so that they satisfy predetermined auto-correlation and/or' cross-correlation criteria within a region around the zero-time offset of the correlation function, defined as an Interference Free Window (IFW).