Pulse generation system

Claim 3

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; radio receiver means responsive to the radio echo location signals, delay pulser means actuated by the output of said receiver means to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal; and means transmitting interfering pulses actuated by the output from said delay pulser means; said delay pulser means being adjusted so that each interfering pulse includes in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment.

Claim 4

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; radio receiver means responsive to the radio echo location signals, delay pulser means actuated by the output of said receiver means to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal; and means transmitting interfering pulses actuated by the output from said delay pulser means; said delay pulser means being adjusted so that each interfering pulse includes in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment.

Claim 5

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; radio receiver means responsive to the radio echo location signals; delay pulser means actuated by the output of said receiver means to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal; means transmitting interfering pulses actuated by the output of said delay pulser means; said delay pulser means being adjusted so that each interfering pulse includes in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment, and means neutralizing that portion of the output from said transmitting means which is fed back into said radio receiver means through radiation leakage.

Claim 6

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; radio receiver means responsive to the radio echo location signals; delay pulser means actuated by the output of said receiver means to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal; means transmitting interfering pulses actuated by the output of said delay pulser means; said delay pulser means being adjusted so that each interfering pulse includes in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment, and means neutralizing that portion of the output from said transmitting means which is fed back into said radio receiver means through radiation leakage.

Claim 7

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, the second of said channels receiving said interfering signals only; means in said receiver for mixing the outputs of said two channels so as to neutralize said interfering signals; and to deliver the signals from the radio echo location equipment; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses.

Claim 8

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, the second of said channels receiving said interfering signals only; means in said receiver for mixing the outputs of said two channels so as to neutralize said interfering signals; and to deliver the signals from the radio echo location equipment; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses.

Claim 9

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which compriseS; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, the second of said channels receiving said interfering signals only; means in said receiver for mixing the outputs of said two channels so as to neutralize said interfering signals; and to deliver the signals from the radio echo location equipment; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses, said delay pulser means being adjusted so that each said interfering signal covers in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment.

Claim 10

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which compriseS; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, the second of said channels receiving said interfering signals only; means in said receiver for mixing the outputs of said two channels so as to neutralize said interfering signals; and to deliver the signals from the radio echo location equipment; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses, said delay pulser means being adjusted so that each said interfering signal covers in time the echo signal corresponding to the next succeeding signal received from said radio echo location equipment.

Claim 11

The apparatus as defined in claim 5 including automatic control means coupled between the receiver mixing means and said second channel for automatically adjusting the gain of said second channel whenever the difference between the interference signals of said first and second channels exceeds a predetermined amount.

Claim 12

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, and the second of said channels receiving said interfering signals only, the output of one of said channels being of one polarity, the output of the other of said channels being of the opposite polarity; means within said receiver mixing the outputs of said two channels; means within said receiver controlling the gain of said second channel, said controlling means being responsive to the output of said receiver so that said interfering signals remain substantially neutralized; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses.

Claim 13

A means for impairing the effectiveness of radio echo location equipment, which recurrently transmits radio frequency impulses and receives their echoes from obstacles, which comprises; means transmitting pulsed interfering signals; a radio receiver containing two channels, the first of said channels receiving signals from said radio echo location equipment and said interfering signals, and the second of said channels receiving said interfering signals only, the output of one of said channels being of one polarity, the output of the other of said channels being of the opposite polarity; means within said receiver mixing the outputs of said two channels; means within said receiver controlling the gain of said second channel, said controlling means being responsive to the output of said receiver so that said interfering signals remain substantially neutralized; and delay pulser means actuated by the output from said receiver to provide a pulse of selected duration a predetermined time after receipt of a radio echo location signal, said delay pulser means actuating said means transmitting interfering pulses.

Claim 14

In apparatus which comprises a receiver which receives, amplifies, and demodulates radio signals and a transmitter which transmits other radio signals in response to said demodulated signals, a means for neutralizing said transmitted signals entering said receiver by radiation coupling, which comprises, amplifier means, attenuator means directly coupling a portion of the output of said transmitter to said amplifier means, separate demodulator means receiving the output of said amplifier means, means mixing the output of said separate demodulator means with said demodulated signals so as to neutralize that portion of said demodulated signals corresponding to said transmitted signals, and means responsive to the output of said mixing means for suitably controlling the gain of said amplifier means, so that the demodulated transmitted signals remain substantially neutralized.

Claim 15

In apparatus which comprises a receiver which receives, amplifies, and demodulates radio signals and a transmitter which transmits other radio signals in response to said demodulated signals, a means for neutralizing said transmitted signals entering said receiver by radiation coupling, which comprises, amplifier means, attenuator means directly coupling a portion of the output of said transmitter to said amplifier means, separate demodulator means receiving the output of said amplifier means, means mixing the output of said separate demodulator means with said demodulated signals so as to neutralize that portion of said demodulated signals corresponding to said transmitted signals, and means responsive to the output of said mixing means for suitably controlling the gain of said amplifier means, so that the demodulated transmitted signals remain substantially neutralized.

Claim 16

In a radio echo jamming system, apparatus for minimizing at the jamming station the effect of an interference signal which is being transmitted simultaneously with the reception of a signal from a remote radio echo location system comprising, means for receiving the radio echo location signal and the interference signal appearing simultaneous therewith, the receiving means including demodulating means, separate channel means coupled directly to the interference signal transmitting means, said separate channel means including demodulating means, and means responsive to the output of said receiving means and said separate channel means for neutralizing the demodulated interference signal from said receiving means with the demodulated interference signal from said separate chAnnel means and delivering substantially only the demodulated radio echo location signal.

Claim 17

In a radio echo jamming system, apparatus for minimizing at the jamming station the effect of an interference signal which is being transmitted simultaneously with the reception of a signal from a remote radio echo location system comprising, means for receiving the radio echo location signal and the interference signal appearing simultaneous therewith, the receiving means including demodulating means, separate channel means coupled directly to the interference signal transmitting means, said separate channel means including demodulating means, and means responsive to the output of said receiving means and said separate channel means for neutralizing the demodulated interference signal from said receiving means with the demodulated interference signal from said separate chAnnel means and delivering substantially only the demodulated radio echo location signal.

Claim 18

The apparatus as defined in claim 9 including automatic control means coupled between the last named means and said separate channel means for automatically adjusting the gain of said separate channel means whenever the difference between the demodulated interference signals to be neutralized exceeds a predetermined amount.