Abstract: A bistatic radar system may include a transmitter, a target at a first known position, a receiver at a second known position, and a transmitter position determination unit. The receiver is configured to receive one or more reflected radar signals transmitted from the transmitter and reflected off the target. The receiver is configured to receive one or more direct radar signals transmitted from the transmitter. The transmitter position determination unit is configured to determine a position of the transmitter based on a determination of a distance between the first and second known positions and a determination of a first angular difference between the reflected radar signal(s) and the direct radar signal(s) that are received by the receiver.

Abstract: A signal processing method is provided. The signal processing method includes receiving, at a signal processing system, a signal of interest, calculating, using the signal processing system, a power spectral density for the signal of interest, calculating, using the signal processing system, a basis vector based on the power spectral density shape, performing, using the signal processing system, a linear regression using the basis vector to generate an estimate for at least one parameter of the signal of interest, and transmitting, based on the at least one generated estimate, a signal that avoids interference with the signal of interest.

Abstract: A method and apparatus for detecting signals. According to an embodiment, energy waves are received at a first receiver system and a second receiver system. The first receiver system generates first information using the energy waves received at the first receiver system. The first receiver system receives second information generated using the energy waves received at the second receiver system from the second receiver system. The first receiver system identifies desired information about a repetitive portion of a signal carried in the energy waves received at the first receiver system using the first information and the second information.

Abstract: A signal processing method is provided. The signal processing method includes receiving, at a signal processing system, a signal of interest, calculating, using the signal processing system, a power spectral density for the signal of interest, calculating, using the signal processing system, a basis vector based on the power spectral density shape, performing, using the signal processing system, a linear regression using the basis vector to generate an estimate for at least one parameter of the signal of interest, and transmitting, based on the at least one generated estimate, a signal that avoids interference with the signal of interest.

Abstract: A bistatic radar system may include a transmitter, a target at a first known position, a receiver at a second known position, and a transmitter position determination unit. The receiver is configured to receive one or more reflected radar signals transmitted from the transmitter and reflected off the target. The receiver is configured to receive one or more direct radar signals transmitted from the transmitter. The transmitter position determination unit is configured to determine a position of the transmitter based on a determination of a distance between the first and second known positions and a determination of a first angular difference between the reflected radar signal(s) and the direct radar signal(s) that are received by the receiver.

Abstract: A method and apparatus for detecting signals. According to an embodiment, energy waves are received at a first receiver system and a second receiver system. The first receiver system generates first information using the energy waves received at the first receiver system. The first receiver system receives second information generated using the energy waves received at the second receiver system from the second receiver system. The first receiver system identifies desired information about a repetitive portion of a signal carried in the energy waves received at the first receiver system using the first information and the second information.

Abstract: A method and apparatus for detecting signals. According to an embodiment, energy waves are received at a first receiver system and a second receiver system. The first receiver system generates first information using the energy waves received at the first receiver system. The first receiver system receives second information generated using the energy waves received at the second receiver system from the second receiver system. The first receiver system identifies desired information about a repetitive portion of a signal carried in the energy waves received at the first receiver system using the first information and the second information.

Abstract: A method and apparatus for detecting signals. According to an embodiment, energy waves are received at a first receiver system and a second receiver system. The first receiver system generates first information using the energy waves received at the first receiver system. The first receiver system receives second information generated using the energy waves received at the second receiver system from the second receiver system. The first receiver system identifies desired information about a repetitive portion of a signal carried in the energy waves received at the first receiver system using the first information and the second information.

Abstract: A bank of order statistic filters applied to a set of antenna or transducer beams are used to detect and determine the line-of-bearing to the source of transient RF (or other, e.g., acoustic) signals. By applying order statistic filters to signals received by a set of antenna or transducer beams, this system sets a detection threshold that is unaffected by transient signals, thereby allowing the detection of these transient signals. Knowing which antenna beam the transient signals are located within allows the determination of a line of bearing to the source of the transient signals.

Abstract: Methods provided by this description may include receiving input signals for classification, and deriving specified signal parameters from the input signals. These methods may also compare the specified signal parameter to signal parameters derived from training signals, with the training signals being associated with predefined signal classes. These methods may also classify the input signals based on this comparison of the signal parameters, as derived respectively from the input signals in the training signals.

Abstract: Methods provided by this description may include receiving input signals for classification, and deriving specified signal parameters from the input signals. These methods may also compare the specified signal parameter to signal parameters derived from training signals, with the training signals being associated with predefined signal classes. These methods may also classify the input signals based on this comparison of the signal parameters, as derived respectively from the input signals in the training signals.