Abstract:
Systems, devices and methods are disclosed for detecting, characterizing and engaging unmanned vehicles. In one aspect, a method includes detecting an object, such as an unmanned aerial, land or aquatic vehicle that communicates using a radio control (RC) communications protocol, traveling to a zone including scanning one or more frequencies of RF signals; analyzing one or both of time and frequency information of the RF signals to characterize the detected object; and engaging the detected object as an authorized or unauthorized object in the monitored zone.
Abstract:
Jammer signals are sent from a Military Global Positioning System Signal Jammer. Similar manufactured military global positioning signals from the satellite will be enhanced by the addition of noise to the carrier signals and digital guiding target military global positioning system receiver will be jammed. Military munitions and Military Global Positioning guided missiles are intended to be driven by the dysfunctional global positioning satellite signals.
Abstract:
Detecting and jamming a wireless network using an intelligent jammer comprises determining that a signal source is an unlicensed signal source, synchronizing the intelligent jammer with the unlicensed signal source, determining a time and a frequency of a protocol signal associated with the unlicensed signal source, and transmitting a jamming signal according to the time and the frequency of the protocol signal. A system for detecting and jamming a wireless network comprises a first intelligent jammer, and an Intelligent Detection and Jamming Server (IDJS) coupled to the first intelligent jammer.
Abstract:
Arrangements are described that may be used to reduce the intelligibility of speech using masker signals which are obfuscated yet correlated versions of the speech. Other applications of pitch analysis and demodulation are also described. A system may be used to drive an array of loudspeakers to produce a sound field that includes a source component, whose energy is concentrated along a first direction relative to the array, and a masking component that is based on an estimated intensity of the source component in a second direction that is different from the first direction.
Abstract:
In some embodiments of the invention, a method is provided in a wireless communication device (110) for transmitting an alarm signal to a radio access node (120). According to this method, the wireless communication device (110) detects (210) jamming of a downlink signal (160) which is transmitted from the radio access node (120). The wireless communication device (110) then transmits (220) an alarm signal (150) over a non cell-specific contention-based uplink radio channel. The alarm signal (150) comprises information relating to an identity associated with the wireless communication device (110). The parameters required for transmitting on the non cell-specific contention-based uplink radio channel are preconfigured in the wireless communication device (110).
Abstract:
Multiple downlink (DL) and uplink (UL) carriers can enhance wireless communication between nodes and user equipment (UE). Among the carriers, it is beneficial to have some special, by configuration designated carriers to provide synchronization, system information, paging, data and control for multi-carrier enabled UEs. Thereby, overhead system information can be reduced. For instance, synchronization and paging for a certain cell are not provided on all carriers. A carrier can provide backward compatibility for single carrier UEs for access, synchronization, broadcast, and new control region within the data region of the legacy terminals. Coordination between nodes for selecting anchor carriers that mitigate interference and for transmit power control for non-anchor carriers provide further network performance advantages.
Abstract:
Anti jamming system comprising a tunable negative jamming signal feedback loop for feedback suppression of a received jamming signal, including a receiver receiving an jamming signal followed by a jamming signal replica generator for generating an replica jamming signal. The receiver comprising a zero IF PLL jamming signal receiver having a synchronous demodulator and a phase detector, signal inputs thereof being coupled to said input means and carrier inputs coupled to in-phase and phase quadrature oscillator outputs, respectively, of a local voltage controlled oscillator (VCO), said VCO receiving a tuning control signal for tuning the zero IF PLL jamming signal receiver at the carrier frequency of the jamming signal. The VCO is included in a phase locked loop (PLL) comprising subsequent to the VCO, said phase detector and a loop filter. The replica jamming signal generator includes a tracking modulator with a baseband signal input coupled to an output of said synchronous demodulator and a carrier input coupled to the in-phase oscillator output of the VCO, an output of said modulator being negatively fedback to the input of the receiver.
Abstract:
Disclosed is a device (202), including a communication unit configured to operate on a communication frequency, wherein the communication unit includes a tunable element (205), which tunable element has an initial frequency band, which prevents a signal on the communication frequency from traversing the communication unit, and is configured to tune away from the initial frequency band responsive to being in proximity of a transmitter (201 ) of a predefined type, such that a signal on the communication frequency is allowed to traverse the communication unit. Also disclosed are related other devices, methods and systems.