초록

A time domain communications system wherein time modulated, impulse derived signals are multiplied by a template signal, integrated, and then demodulated. By this process, usable signals are obtained which would be otherwise obscured by noise.

대표청구항 ▼

A time domain radio transmission system comprising: a radio transmitter comprising: pulse generating means for generating reoccurring pulses units, wherein each pulse unit is comprised of at least one pulse signal, a source of intelligence signals, modulation means responsive to said pulse generatin

A time domain radio transmission system comprising: a radio transmitter comprising: pulse generating means for generating reoccurring pulses units, wherein each pulse unit is comprised of at least one pulse signal, a source of intelligence signals, modulation means responsive to said pulse generating means and said source of intelligence signals for providing, as a modulated output, a train of signals wherein at least a discrete edge region of a last-named signal is varied in time position as a function of said intelligence signals, transmitting antenna means comprising a wide band transmitting antenna, a D.C. power source, and power switching means coupled to said wideband transmitting antenna and said power source having a control input responsive to a said modulated output for switching between the states of power applied to said wideband antenna and not being applied to said wideband antenna, whereby discrete switched pulses are transmitted as transmitted signals; a radio receiver comprising: receiving means comprising a wide band antenna for receiving transmissions from said transmitting antenna and for providing received signals, signal generating means responsive to a control signal for generating, repetitively, template signals generally corresponding in time to an average time of occurrence of a said signal portion of a said received signal from a said transmitted signal, and signal timing means responsive to said received signals and said template signals for generating said control signal; and demodulation means comprising: multiplying means responsive to said template signals and said received signals for providing product signals, signal means including integration means responsive to said product signals for providing an integral signal representative of the integral of said product signal, and means responsive to said integral signal for reproducing said intelligence signals.