US 2010/0302087 A1Published application

Smart Signal Jammer

AssigneeLockheed Martin Corporation

InventorNathan E. Low

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Abstract

A smart signal jammer is disclosed that receives a description of an unwanted signal or signals to be jammed, and transmits one or more jamming signals in one or more temporal transmission patterns of pulses that jam the unwanted signal or signals. This is in contrast to basic jammers in the prior art, which typically receive a description of a signal or signals to be transmitted. A smart jammer according to the present invention can improve the efficiency with which available transmitters are used to transmit jamming pulses, thus reducing the number of needed transmitters, compared to a prior-art jammer. A smart jammer according to the present invention comprises a jamming signal calculator that calculates the parameters of the jamming signals to be transmitted. The calculations are based on inequalities that are satisfied by an efficient jamming signal.

Claims23

Dependent claims

An apparatus comprising:

a receiver for receiving a description of a first signal to be jammed, wherein the description comprises:
(i) a minimum baud value, Rmin, of the first signal,
(ii) a maximum baud value, Rmax, of the first signal, and
(iii) a specification of frequency bands in which the frequency of the first signal can lie, wherein the number of frequency bands is B;
a first transmitter for transmitting a second signal to jam the first signal, wherein
(a) the frequency of transmission of the second signal is based on the minimum baud value Rmin, of the first signal, on the maximum baud value Rmax, of the first signal, and on the specification of frequency bands in which the frequency of the first signal can lie;
(b) the second signal is transmitted into one of the frequency bands at a time;
and
(c) the second signal is transmitted into different frequency bands at different times according to a first temporal transmission pattern that is based on Rmin, Rmax, and B;
wherein B is an integer greater than 1;
and
wherein Rmin and Rmax are positive real numbers and Rmin<Rmax.

9 more elements

A method comprising:

receiving a description of a first signal to be jammed, wherein the description comprises:
(i) a minimum baud value, Rmin, of the first signal,
(ii) a maximum baud value, Rmax, of the first signal, and
(iii) a specification of frequency bands in which the frequency of the first signal can lie, wherein the number of frequency bands is B;
generating a first temporal transmission pattern that is based on Rmin, Rmax, and B;
transmitting a second signal for jamming the first signal, wherein
(a) the frequency of transmission of the second signal is based on the minimum baud value Rmin, of the first signal, on the maximum baud value Rmax, of the first signal, and on the specification of frequency bands in which the frequency of the first signal can lie;
(b) the second signal is transmitted into one of the frequency bands at a time;
and
(c) the second signal is transmitted into different frequency bands at different times according to the first temporal transmission pattern;
wherein B is an integer greater than 1;
and
wherein Rmin and Rmax are positive real numbers and Rmin<Rmax.

10 more elements

Dependencies are inferred from the claim text.