A combined radar and telemetry system is described. The combined radar and telemetry system includes a processing unit that executes instructions, where the instructions define a radar waveform and a telemetry waveform. The processor outputs a digital baseband signal based upon the instructions, where the digital baseband signal is based upon the radar waveform and the telemetry waveform. A radar and telemetry circuit transmits, simultaneously, a radar signal and telemetry signal based upon the digital baseband signal.

A spectrum sharing system includes an advanced beacon (e.g. a low latency RF link) as part of an information sharing subsystem. The advanced beacon signal carries radar spectrum transmission schedule in an obfuscated way such as not to reveal the geolocation of the radar. The information sharing subsystem directs nodes, such as cell phones, to share spectrum based on spectrum sharing instructions contained in the advanced beacon. The spectrum sharing system permits out-of-band sharing of spectrum white space, as well as sharing of in-band spectrum gray space.

Various embodiments provide an anti-jamming method in a satellite communication (SATCOM) system. A waveform modulation is performed on a waveform of a source data to provide a modulated waveform transmitted to a transmitter and then to a receiver. The modulated waveform transmitted from the receiver is demodulated to provide a demodulated waveform. In response to interference, a game reasoning process is performed on the demodulated waveform to provide an anti-jamming adaptive waveform. By performing a game-optimal waveform modulation on the anti-jamming adaptive waveform, a frequency hopping process is used to guide the data transmission, such that the source data is transmitted with a minimal probability of being interfered.

An interference cancellation system (ICS) may be used with a communication system to prevent or minimize interference from one or more sources. The ICS may receive radio RF signals comprised of one or more signals of interest (SOI) and multiple interfering signals. The ICS may use a sample of the interfering signals to cancel the interfering signals from the SOI. The multiple interfering signals may be converted into a single optical signal for cancellation. One or more optical cancellation paths may be used for interference cancellation. Each optical cancellation path may include an optical attenuator and/or an optical delay to achieve phase shifts and/or delays for interference cancellation.

Systems and methods for cancelling interference from a received signal in order to properly detect a signal of interest are disclosed. A combined signal of interest plus interference signal may be received. A copy or sample of the interference signal may be determined. The interference signal and the combined signal of interest plus interference signal may be converted to the optical domain. The interference signal may be optically phase shifted by 180 degrees, which may result in an optically inverted interference signal. The optically inverted interference signal may be variably optically attenuated and/or variably optically time delayed, for example based on a detected output power of an optical subsystem of the interference cancellation system. As a result, interference cancellation of the interference signal from the combined signal of interest plus interference signal may be achieved, resulting in 50 dB or more of cancellation of the interference signal.

The present invention relates to methods and systems for electronic countermeasures, and particularly to methods and systems for electronic countermeasures that employ radar jamming devices.

Various examples are provided related to mutual coupling reduction between elements in antenna arrays. In one example, an antenna array includes patch antenna elements disposed on a first side of a substrate; and meander line (ML) slots formed in a ground plane disposed on a second side of the substrate. The ML slots can be disposed opposite a corresponding patch antenna element with the ML slot extending at an angle between first and second sides defining a corner that is adjacent to another patch antenna element. In another example, an antenna array includes first and second patch antenna elements disposed on a first side of a substrate and separated by a gap; and at least one meander line (ML) slots formed in a ground plane disposed on a second side of the substrate and aligned with the gap between the first and second patch antenna elements.

Certain aspects of the present disclosure provide techniques for jammer rejection at an antenna tuner. An example apparatus includes a first filter comprising at least one reactive component. The apparatus further includes an antenna tuner comprising a capacitor bank selectively coupled in parallel with the at least one reactive component. The apparatus further includes a first set of switches coupled to at least the first filter, wherein the first set of switches is configured to switch among at least a first mode and a second mode, wherein the first mode is configured to bypass the first filter across a signal path, and the second mode is configured to apply the first filter across the signal path.

Embodiments relate to the identification and mitigation of jamming attacks on autonomous vehicles. A technique includes determining that an object previously detected is no longer detected by a sensor of a vehicle. The technique includes, in response to the object previously detected no longer being detected by the sensor, determining that another sensor of the vehicle detects the object. The technique includes, in response to the object previously detected no longer being detected by the sensor, performing safety actions based on another sensor detecting the object.

The invention refers to a counter countermeasures device, for use in an anti-aircraft combat. In one embodiment the CCM device together with an anti-aircraft weapon system forms an air defense system. The counter countermeasures device is configured for generating and emitting electromagnetic radiation of appropriate wavelengths and is capable of operating in spoof and jam mode and switching between both modes. The mode of operation is dependent on the selection of the output power of the EM source unit and the distance to the target. The selection of the output power may be done with a mechanical cover or with an electronic solution, decreasing driving current of the EM sources. With the CCM device the anti-aircraft missile launch warning and detection system installed on aircrafts are deceived and the countermeasures are released. With the use of the CCM device the efficiency of the anti-aircraft combat is highly improved, i.e. the probability of the target hit is highly improved.