CODE DIVISION MULTIPLE ACCESS (CDMA) METHOD AND APPARATUS FOR PROTECTING AND AUTHENTICATING WIRELESSLY TRANSMITTED DIGITAL INFORMATION

WIPO Patent Application WO2005067538

A3

A spread spectrum method and apparatus for protecting and authenticating wirelessly transmitted digital information using numerous techniques. The apparatus may be a wireless code division multiple access (CDMA) communication system, a base station, a wireless transmit/receive unit (WTRU), a transmitter, a receiver and/or an integrated circuit (IC). The wireless CDMA communication system includes a transmitter which steganographically embeds digital information in a CDMA communication signal and wirelessly transmits the CDMA communication signal. The system further includes a receiver which receives the CDMA communication signal and extracts the steganographically embedded digital information from the received CDMA communication signal.

KAEWELL JOHN DAVID JR (US)
CHITRAPU PRABHAKAR R (US)
OLESEN ROBERT LIND (US)
SHIN SUNG-HYUK (US)
HOFFMANN JOHN ERICH (US)
REZNIK ALEXANDER (US)

PCT/US2005/001334

December 28, 2006

January 13, 2005

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INTERDIGITAL TECH CORP (US)
KAEWELL JOHN DAVID JR (US)
CHITRAPU PRABHAKAR R (US)
OLESEN ROBERT LIND (US)
SHIN SUNG-HYUK (US)
HOFFMANN JOHN ERICH (US)
REZNIK ALEXANDER (US)

H04B1/00; G06F15/16; G06F15/173; H04B1/10; H04B7/01; H04B7/208; H04B7/212; H04B7/216; H04B7/26; H04B15/00; H04J1/00; H04J3/00; H04J3/16; H04J11/00; H04J13/00; H04J99/00; H04L1/00; H04L1/06; H04L12/28; H04L12/56; H04W12/06; H04L1/08; H04L1/18

US6880009B2	2005-04-12
US5568483A	1996-10-22
US6937843B2	2005-08-30
US6728323B1	2004-04-27
US6928287B2	2005-08-09

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