Example techniques relate to playback based on acoustic signals in a system including a first playback device and a second playback device. A first playback device may detect a first acoustic signal. The first playback device sends, to a network device, data corresponding to the detected first acoustic signal. The network device may generate one or more instructions based on the sent data corresponding to the detected first acoustic signal and send data representing such instructions to the first playback device. Based on the instructions, the first playback device plays back audio content. Further, the second playback device may stop playing back audio content based on further instructions.

Example techniques relate to grouping based on acoustic signals in a system including a first network device and a second network device. A first network device may detect a first acoustic signal, perhaps while playing back first audio content in a single-device playback configuration. The first network device sends, to the second network device, data corresponding to the detected first acoustic signal. The second network device may generate one or more instructions based on the sent data corresponding to the detected first acoustic signal and send data representing such instructions to the first network device. Based on the instructions, the first network device transitions from operating in the single-device playback configuration to operating in a grouped playback configuration. In the grouped configuration, the first network device outputs second audio content in synchrony with the third network device.

A system for detecting and defeating a drone is disclosed which includes a detection antenna array configured to detect the drone and a control signal of the drone in a 360 degree field, the detection antenna array being further configured to detect the directionality of the drone with reference to the most dominant of the control signal of the drone detected by each of a plurality of antennas within the detection antenna array; a neutralization system disposed in communication with the detection antenna array; the neutralization system including a transmission antenna configured to transmit an override signal to the detected drone, an amplifier configured to modulate a gain of the override signal, and a processing device configured to generate the override signal and control transmission of the override signal.

A system and method of the disclosure relates to satellite tracking. The system may comprise a tracking receiver that includes a first analog-to-digital (A/D) converter coupled between a sum input and a digital signal processor (DSP), a second A/D converter coupled between a difference input and the DSP, and a calibration output coupled to the sum input and coupled to the difference input. The first A/D converter may convert an signal received at the sum input into a sum digital signal, and provide the sum digital signal to the DSP. The second A/D converter may convert an signal received at the difference input into a difference digital signal, and provide the difference digital signal to the DSP. The tracking receiver may generate an calibration signal and provide the calibration signal through the calibration output.

A process of screening direction finding solutions to reduce the number of valid direction finding solution rejections while maintaining an acceptable level of wild bearings being reported utilizing the proximity of the correlation values of the highest correlation and second highest correlation given a correlation pattern of a detected signal of unknown origin.

A remote parking system includes: a terminal configured to transmit a ranging signal; plural reception units configured to detect an arrival direction of the ranging signal; a control device configured to acquire a distance from the terminal to a vehicle based on the arrival direction of the ranging signal detected by at least two of the reception units and to move the vehicle toward a parking position in a case where the control device determines that the acquired distance from the terminal to the vehicle is equal to or less than a prescribed threshold; and a transmission antenna fixed to the vehicle and configured to transmit the ranging signal. The control device is configured to determine a failure of at least one of the reception units based on the ranging signal transmitted from the transmission antenna and received by the at least one of the reception units.

Example techniques relate to playback based on acoustic signals in a system including a first network device and a second network device. A first network device may detect a presence of a user using a camera and/or infrared sensors. The first network device sends, in response to detecting the presence of the user, a particular signal via the first network interface. The second network device receives data corresponding to the particular signal and plays back an audio output corresponding to the particular signal.

A method for identifying transmitter usage characteristics of at least one transmitter. The method includes the procedures of receiving by an array of dual polarized antennas, transmissions from a plurality of transmitters. Each one of the transmitters transmits over the same frequency band and according to the same transmission protocol. Each one of the transmitters is associated with unique multi-access information. The method further includes the procedure of receiving a control transmission from a base station. The base station employs the protocol. The control transmission at least includes a plurality of unique multi-access information respective of the transmitters. The method also includes the procedure of associating between each one of the transmitters and the respective multi-access information and identifying transmitter usage characteristics of at least one selected transmitter according to the received transmission therefrom. The transmitter usage characteristics include transmitter location characteristics and transmission characteristics.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.

A network connection method includes determining whether an electronic device is moving and obtaining position information of the electronic device from the positioning unit in response to determining that the electronic device is moving. The method also determines whether the electronic device is located within a preset range based on the position information, and accordingly generates a movement path in response to determining that a distance between the electronic device and the wireless device is within a preset value. The method further determines whether the movement path of the electronic device matches with a part of at least one stored path; and switches a state of at least one wireless communication unit in response to determining that the movement path of the electronic device matches with a part of the at least one stored path. A related electronic device and a non-transitory storage medium are also provided.