This application relates to wireless networks and more specifically to systems and methods for determining the location of distributed radar detectors and selecting available channels free of radar signals from a plurality of radio frequency channels. One embodiment includes a cloud DFS super master and a radar detector communicatively coupled to the cloud DFS super master. The cloud DFS super master is programmed to receive the results of the scan for a radar signal from the radar detector and to generate integrated client device geolocation information. The cloud DFS super master is also programmed to determine a location for the radar detector based at least on the integrated client device geolocation information, and determine a radio channel free of the radar signal based at least on the location for the radar detector and the results of the scan for the radar signal.

Various examples are provided for jamming avoidance response (JAR), and photonic implementations thereof. In one example, a method includes generating optical pulses that correspond to raising envelope of a beat signal associated with an interference signal and a reference signal; generating optical spikes that correspond to positive zero crossing points of the reference signal; providing a phase output that indicates whether the beat signal is leading or lagging the reference signal, the phase output based at least in part upon the optical spikes; and determining an adjustment to the reference frequency based at least in part upon the optical pulses and the phase output. In another example, a JAR system includes a photonic P-unit to generate the optical pulses; a photonic ELL/T-unit to generate the optical spikes; a photonic TS unit to provide the phase output; and a logic unit to determine the adjustment to the reference frequency.

The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of radio frequency channels. One embodiment includes a cloud DFS super master, a plurality of radar detectors, and one or more client devices. The cloud DFS super master is programmed to receive the results of a scan for a radar signal from each of the plurality of radar detectors, geo-location information for the plurality of radar detectors, geo-location information for the client devices and a request for available radio channels from the client devices. The cloud DFS super master is programmed to determine one or more radio channels that are free of radar signals within a distance of the client device.

A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, an apparatus is configured to determine whether radar signals are present on one or more channels. The apparatus is configured to transmit a channel feedback report that includes channel information for each of the one or more channels based on the determination of whether radar signals are present on the one or more channels. The channel information for each of the one or more channels includes at least one of a time at which radar signal detection was attempted, a frequency range of a detected radar signal, a set of radar signal characteristics, a received radar vector, a geographical location of the wireless device when radar signal detection was attempted, or an indication of wireless activity.

A system to allow the cancellation of terrestrial interferences over aerial networks (Satellite links, and wireless communications) with the support of a canceller module to dynamically decompose wanted and unwanted signals. The invention performs interference cancellation over satellite carriers affected by terrestrial congested spectrum, including the jamming, share of frequencies, or accidental interferences for satellite communications, GPS, Galileo, GNSS or any type of satellite link. The invention provides resiliency to the communication by the regeneration of the desired signal filtering of any unwanted noise received in a terrestrial antenna without the need of any guidance by the modulation. This invention is applicable for any satellite constellation (GEO, MEO, LEO, GPS, MCODE, GNSS, or wireless connectivity, 2G, 3G, 4G, 5G, 6G, Radar, Wifi, WiMax, etc) and any type of satellite antenna (parabolic, mechanically flat panel antenna, steerable flat panel antennas, unidirectional, etc).

A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.

A method includes determining that a first receiver of a node of a mobile ad-hoc network (MANET) is in an electromagnetic contested environment for a first frequency. The method also includes scanning a frequency coverage range of a second receiver of the node for unused frequencies. The method additionally includes selecting a frequency from the unused frequencies, the selected frequency to be used for communication of messages from another node of the MANET to the node via the second receiver. The method further includes transmitting, to the other node, a message including information of the selected frequency via the transmitter.

A method and apparatus are disclosed for searching for a radar signal within signals received by a wireless device. The wireless device may receive signals within a first frequency segment and a second frequency segment, which is adjacent to the first frequency segment. The wireless device may determine Fast Fourier Transform (FFT) bins associated with the first frequency segment and the second frequency segment. The wireless device may combine the FFT bins associated with the first frequency segment and the second frequency segment and may search for the radar signal within the combined FFT bins.

Frequency management methods and communication networks utilizing such frequency management methods are disclosed. More specifically, multiple frequency sets may be utilized to facilitate frequency hopping and a frequency management method may implement various switching schemes to switch between the different frequency sets. Techniques such as synchronization and spectrum harvesting may also be provided to support utilization of multiple frequency sets, all of which may provide improved operation reliabilities and better handling of jamming signals.

Provided is an electronic apparatus for jamming, the apparatus including a receiver that sequentially receives a first signal and a second signal, a signal analyzer that analyzes the first signal and detects a threat signal in a first frequency band, a controller that controls a jamming resource to generate a jamming signal corresponding to the threat signal in the first frequency band, a transmitter that transmits the jamming signal, and a signal detector that identifies, after the jamming signal is transmitted, whether the threat signal is present in the first frequency band from the second signal while the signal analyzer identifying whether the threat signal is present in a second frequency band by analyzing the first signal or the second signal.