Communication system employing multipath rejection means

Claim 1

A SIGNAL TRANSMISION SYSTEM INCLUDING IN COMBINATION, TRANSMITTER MEANS HAVING A FIRST SIGNAL GENERATOR FOR PROVIDING A CARRIER WAVE SIGNAL MODULATED BY A FIRST QUASIRANDOM NOISE SIGNAL HAVING A PREDETERMINED ORDER OF PULSE SIGNALS WITH A FIRST PULSE DURATION AND A PREDETERMINED PERIOD, AND A RECEIVER HAVING A SECOND SIGNAL GENERATOR FOR PROVIDING A REFERENCE SIGNAL MODULATED BY A SECOND QUASI-RANDOM NOISE SIGNAL HAVING SAID PREDETERMINED ORDER OF PULSE SIGNALS WITH SAID PREDETERMINED PERIOD, SAID SECOND QUASI-RANDOM NOISE SIGNAL HAVING A SECOND PULSE DURATION NO GREATER THAN SAID FIRST PULSE DURATION AND LESS THAN THE INTERVAL BETWEEN THE RECEPTION OF ANY TWO IDENTICAL SIGNALS RECEIVED AT DIFFERENT TIMES AND MODULATED BY SAID FIRST QUASI-RANDOM NOISE SIGNAL AND TRANSMITTED TO SAID RECEIVER, SAID SECOND SIGNAL GENERATOR INCLUDING PHASE SHIFTING MEANS FOR SHIFTING THE PHASE OF SAID SECOND QUASIRANDOM NOISE SIGNAL RELATIVE TO SAID RECEIVED FIRST QUASIRANDOM NOISE SIGNAL, SAID RECEIVER INCLUDING MULTIPLIER MEANS COUPLED TO SAID SECOND SIGNAL GENERATOR AND ADAPTED TO RECEIVE SAID CARRIER WAVE SIGNAL, SAID MULTIPLIER MEANS ACTING TO MULTIPLY SAID REFERENCE SIGNAL AND SAID CARRIER WAVE SIGNAL, AND INTEGRATOR MEANS COUPLED TO SAID MULTIPLIER MEANS FOR INTEGRATING THE SIGNAL PRODUCED BY SAID MULTIPLIER MEANS.