Data hiding method and data extracting method

Data transmitting and receiving apparatus

Detector of commercial jammer

Device and method for detecting the presence of an operating...

Device for demodulating a spread spectrum signal

Device for encrypting each input data bit by at least one...

Device for neutralizing a radar used in the fire-control of...

Device for transmission of information at varying frequency

Differential correlator for spread spectrum communication...

Digital communication system including an error correcting...

Digital radio with security system for selectively enabling...

Digital signal transmission system

Digital trading card, system, and method

Digital transmission system

Direct sequence spread spectrum communication system with...

Distributed information system having automatic invocation...

Diversity receiver in a cdma cellular telephone system

Duplex analog scrambler