Spread-spectrum identification signal for communications...

Spread-spectrum multiplexed transmission system

Synchronous spread spectrum communications system and method

System and method for authentication of goods

System and method for communications security protection

System and method for generating signal waveforms in a cdma...

System and method for protecting a receiver from jamming...

System and method for providing security in data...

System for detecting a marker signal inserted in an...

System for the transmission of intelligence by means of...

System of orthogonal code generators, radios provided with a...

Systems and methods of ambiguity envelope encryption scheme...

Systems for determining the frequency of a transmitter

Systems for information exchange

Tamperproof radio anti-jamming device for trespass...

Tracking system

Transmission system

Transmitter and/or receiver unit

Transmitter system

Transmitter/receiver for signals on the scramble unit