Code division multiple access (CDMA) method and apparatus...

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via code word channels

Reexamination Certificate

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C370S335000, C370S342000, C370S208000, C380S031000, C380S032000, C380S033000, C380S034000

Reexamination Certificate

active

07415043

ABSTRACT:
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.

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