The present disclosure relates to a signal receiver and a detection system. The signal receiver includes a housing and a handle. The housing includes a body and a protrusion. The body includes a first face and a second face disposed opposite each other. The protrusion is connected to the body and protrudes relative to the first face along a direction away from the second face. The handle is arranged on the first face.

A device includes a memory configured to store instructions and one or more processors configured to execute the instructions. The one or more processors are configured to execute the instructions to obtain link data corresponding to a communication link to a second device. The one or more processors are configured to execute the instructions to select, at least partially based on the link data, between an ambisonics mode and a stereo mode.

An ultra-wideband assisted precise positioning system and an ultra-wideband assisted precise positioning method are provided. The method includes: arranging a plurality of device nodes in a target area; configuring a central control device node to communicatively connect to the device nodes; configuring the device nodes to perform a positioning process to obtain measured distances and positioning positions to be corrected; and configuring a central control processor to execute a positioning algorithm. The positioning algorithm includes: obtaining the measured distances and the positioning positions to be corrected; for each of the positioning positions to be corrected, performing a center-of-gravity weighting processing on neighboring points for obtaining initial guess positions; and obtaining the initial guess positions to input to an optimizer and optimize an objective function, and finding corrected positions with relatively smallest errors. The objective function includes empirical weights associated with distance errors of the measured distances.

A method for optimizing coverage of a wireless network of a plurality of mobile robots in an environment in which each robot includes an optical sensor module, a microprocessor, and a wireless communication module. The method includes: receiving, by a first robot in the network, signals from a second robot in the network; determining, by the first robot based on the signals, that the first robot or second robot do not fulfil a network coverage condition; selecting, by the first robot, at least two landmarks in the environment; and performing, by the first robot, a movement based on an angle between the two landmarks with respect to the first robot, to improve the network coverage condition

A method for managing beam alignment by a user equipment is provided. The method comprises receiving beam width information and base station location information from a base station, calculating a displacement of location of the UE based on location coordinates of the UE, measuring a change in a signal strength of the UE due to the displacement, and determining whether the UE is moving towards or away from the base station using at least one of the beam width information, base station location information, the displacement, and the measured change in the signal strength, determining whether a a beam re-alignment is required based on the determination of the movement of UE, and transmitting a realignment request to the base station for a re-aligned beam width and a new transmission beam based on determining that the beam re-alignment is required.

A method/system of detecting if a relay is present in a vehicle PEPS system, including transmitting from antenna(s) of a vehicle, a first/second LF signals and determining a minimum time-gap between the signal transmissions so that the time-gap exceeds the channel-coherence-time of a high-frequency wireless-relay. A maximum time between the signals is determined by a timing requirement of the PEPS system and the maximum allowable change in a key-fob position. A time gap between the minimum/maximum times is determined. Depending on the time-gap, the system timing requirement is increased to provide a predetermined-time. At the predetermined-time, separately transmitting between the first/second LF signals, which have a known signal ratio, from a vehicle antenna to a key-fob as part of an LF challenge; measuring, at the key-fob, the signal-levels of the first/second LF signals; and determining if the ratio of the first/second LF signals are within a predefined range.

A method/system of detecting if a relay is present in a vehicle PEPS system, including transmitting from antenna(s) of a vehicle, a first/second LF signals and determining a minimum time-gap between the signal transmissions so that the time-gap exceeds the channel-coherence-time of a high-frequency wireless-relay. A maximum time between the signals is determined by a timing requirement of the PEPS system and the maximum allowable change in a key-fob position. A time gap between the minimum/maximum times is determined. Depending on the time-gap, the system timing requirement is increased to provide a predetermined-time. At the predetermined-time, separately transmitting between the first/second LF signals, which have a known signal ratio, from a vehicle antenna to a key-fob as part of an LF challenge; measuring, at the key-fob, the signal-levels of the first/second LF signals; and determining if the ratio of the first/second LF signals are within a predefined range.

A wireless device includes a positioning sensor, memory circuitry, a wireless interface, and processor circuitry. The processor circuitry is configured to obtain a channel quality parameter indicative of a channel quality of a wireless communication channel. The processor circuitry is configured to determine whether the channel quality parameter satisfies a first criterion. The processor circuitry is configured to, when the channel quality parameter satisfies the first criterion, determine, by using an activation model, a control parameter based on the channel quality parameter. The processor circuitry is configured to, when the channel quality parameter satisfies the first criterion, control the positioning sensor based on the control parameter.

A wireless device includes a positioning sensor, memory circuitry, a wireless interface, and processor circuitry. The processor circuitry is configured to obtain a channel quality parameter indicative of a channel quality of a wireless communication channel. The processor circuitry is configured to determine whether the channel quality parameter satisfies a first criterion. The processor circuitry is configured to, when the channel quality parameter satisfies the first criterion, determine, by using an activation model, a control parameter based on the channel quality parameter. The processor circuitry is configured to, when the channel quality parameter satisfies the first criterion, control the positioning sensor based on the control parameter.

A system and method for an efficient port switching technique for line-of-sight multiple-input multiple-output communications by a base station is provided. The base station includes an antenna array comprising a first number of antenna ports. The base station also includes a transceiver configured to communicate in a wireless communication medium. The base station further includes a processor. The processor is configured to determine, based on the wireless communication medium, one or more parameters of the base station or a receive base station. The processor also is configured to select, based on the one or more first parameters and one or more second parameters, a second number of antenna ports to perform a communication with the receive base station.