Some embodiments relate to a method for repelling a detectable drone, whose flight control and/or whose drone flight path can be influenced by repulsion measures, wherein a repulsion space is defined as a part of the airspace, and wherein the flight control and/or the drone flight path of a drone located in the repulsion space is influenced.

Disclosed herein is an architecture for a Digital Capacity Centric Distributed Antenna System (DCC-DAS) that dynamically manages and distributes resources in different locations where there is demand for capacity. The DCC-DAS also allows for the routing of resources to other applications such as location finding devices, jamming devices, repeaters, etc.

A sound masking system according to the invention is disclosed in which one or more sound masking loudspeaker assemblies are coupled to one or more electronic sound masking signal generators. The loudspeaker assemblies in the system of the invention have a low directivity index and preferably emit an acoustic sound masking signal that has a sound masking spectrum specifically designed to provide superior sound masking in an open plan office. Each of the plurality of loudspeaker assemblies is oriented to provide the acoustic sound masking signal in a direct path into the predetermined area in which masking sound is needed. In addition, the sound masking system of the invention can include a remote control function by which a user can select from a plurality of stored sets of information for providing from a recipient loudspeaker assembly an acoustic sound masking signal having a-selected sound masking spectrum.

The present disclosure relates to concepts of acoustic noise cancelling. A noise cancelling apparatus contains a propulsion component configured to autonomously move the noise cancelling apparatus, and circuitry. The circuitry is configured to determine a position of an acoustic source, to determine a position of an acoustic receiver, and, depending on the detected positions of the acoustic source and the acoustic receiver, to control the propulsion component to navigate the noise cancelling apparatus to a target position to at least partly cancel an acoustic signal from the acoustic source at the position of the acoustic receiver.

A system, method and program product for generating sound masking in an open-plan space. A method is disclosed that includes: establishing a set of acoustic criteria for the space that specifies minimum output levels at a set of specified frequencies; mixing sound samples to create an audio output stream for use as sound masking when broadcast over at least one speaker using a power amplifier; and processing the audio output stream, wherein the processing includes: analyzing the audio output stream with a spectrum analyzer to determine if the minimum output levels at the set of specified frequencies are met; and level adjusting the audio output stream with an equalizer to ensure that minimum output levels at the set of specified frequencies are met but do not exceed a given threshold above the minimum level.

A method is provided for controlling communication in wireless charging. The method comprises: controlling wireless power transfer with a device; receiving a communication signal from the device; generating a jamming signal based on the communication signal from the device; and applying the jamming signal to the communication signal to obtain a jammed communication signal. A device is also provided for controlling communication in wireless charging. The device is configured to control wireless power transfer and receive a communication signal. The device comprises: a jamming circuit configured to generate a jamming signal based on the received communication signal, wherein the device is further configured to apply the jamming signal to the received communication signal to obtain a jammed communication signal.

A jamming device includes a periodic signal generating circuit configured to generate a periodic signal, a noise generating circuit configured to generate a noise signal, and a sweep-signal generating circuit coupled to the periodic signal generating circuit and the noise generating circuit. The sweep-signal generating circuit is configured to generate a frequency-sweep signal based on the periodic signal and the noise signal.

A high-power electromagnetic source for HPEM pulses in a desired radiation direction includes at least three antennas fixed in relation to one another for pulse components, wherein at least two groups of antennas with a respective main direction are present, and a control unit for the activation and phase position of the pulse components for the superimposition for the HPEM pulse, wherein the current radiation direction of said pulse is selectable in an angle range around the main direction. A vehicle with an HPEM source has the antennas mounted in a fixed position or a support for the antennas is pivotably mounted on the vehicle. In a method for emitting the HPEM pulse, all antennas are controlled in order to select the radiation direction in the angle range of less than 360.

The present invention is a barrage jammer with contoured amplitude and an associated method for barrage jamming with contoured amplitude. In a standard prior art barrage jammer, the amplitude of the RF signal is independent from the ambient spectral environment. Alternatively, in a barrage jammer according to the current invention, the ambient spectral environment is detected, processed, and a contoured amplitude plan is developed based on the ambient environmental spectrum data. The barrage jammer transmit signal is transmitted in accordance with the contour amplitude plan. The invention is particularly useful when deployed in a Managed Access Service (MAS) system or as a jamming system. In particular, such a system can be used in a facility (such as a prison, school, government building, etc) to prevent cellphone usage.

An operation method of a terminal in a wireless communication system includes: transmitting uplink (UL) traffic information indicating a size of a UL data signal to a base station; receiving a jamming message generated based on the UL traffic information from the base station; generating an uplink (UL) transmission signal including the UL data signal and a UL jamming signal based on the jamming message; and transmitting the UL transmission signal to the base station. Also, the jamming message indicates a pattern of the UL jamming signal, the UL transmission signal is transmitted in a same frequency band as a frequency band in which a downlink (DL) transmission signal of the base station is received, and the UL jamming signal is transmitted in remaining resources excluding resources occupied by the UL data signal in the frequency band.