System for improving the quality of a received radio signal

System for locally testing a modem employing frequency shift key

System for maintaining low bit error rate in a starcoupled netwo

System for modulating/demodulating digital signals transmitted w

System for multi-level data transmission by means of an angle-mo

System for phasing digital trains and application thereof to the

System for reception of frequency modulated digital communicatio

System for regenerating a data word on a communications ring

System for set-up of transmitters in high capacity digital radio

System for synthesizing a modulated signal

System for tele-locating regenerative repeaters

System for the acquisition of code signals

System for the quantization of signals

System for the ultra-high frequency transmission of numerical da

System for transferring data between asynchronous data buses wit

System for transmitting data through a troposcatter medium

System for transmitting sequences of digital samples encoded by

System for transmitting voice signal

System protocol for composite shift keying communication system

System to generate switching criteria and equalize adaptively in