Methods and devices for characterization of repetitious noise in cable networks are disclosed. A frequency band of interest is identified, a time trace of a signal parameter within the frequency band is obtained, and an autocorrelation of the time trace is computed to detect repetitious noise. The repetition frequency can serve as an indicator of the noise source type, and thus it can assist in noise segmentation.

A system and method are provided for obtaining calibration data for a portable device relative to an object in order to facilitate defining a locator for determining a location of the portable device relative to the object. The system and method may obtain calibration data pertaining to a signal characteristic of communications transmitted from the portable device and corresponding to a known location of the portable device (e.g., truth data).

Disclosed in the present disclosure are a cell handover method and apparatus. The method comprises: sending measurement configuration information to a terminal to be handed over, wherein the measurement configuration information comprises beam configuration information; after the terminal measures neighboring cells according to the measurement configuration information, receiving beam measurement results sent by the terminal according to the beam configuration information; and determining, according to the beam measurement results, a target cell to which the terminal is to be handed over, and handing over the terminal to the target cell by means of a target network device.

A method of testing a radio frequency (RF) integrated circuit includes: forming, performed by the RF integrated circuit, a test loop that passes through a first transceiver circuit, a first front-end circuit, and a second transceiver circuit, based on a test control signal transmitted from a test device; adjusting, performed by the RF integrated circuit, a shift degree of at least one phase shifter in the first front-end circuit, based on the test control circuit; and receiving, performed by the RF integrated circuit, a test input signal via the first transceiver circuit from the test device, and outputting, to the test device, the test input signal that has passed through the test loop, wherein the test input signal is output as a test output signal via the second transceiver circuit.

Methods, systems, and devices for wireless communications are described. In some wireless communications systems, wireless devices (e.g., user equipment (UEs) and base stations) may communicate using beamformed transmissions. If a wireless device receives a transmission over multiple receive beams, the device may utilize signal measurements over the beams to determine a signal direction, a type of noise associated with the transmission, or both. The device may determine a signal direction based on received signal strength measurements over at least two receive beams and may select a beam for communication based on the determined signal direction. Additionally or alternatively, the device may compare noise measurements for the signal over at least two receive beams and may determine whether the noise corresponds to interference or white noise. The device may detect the direction of an interferer and may modify reception or demodulation based on the type of noise detected.

Methods and apparatus are disclosed for vehicle mobile device usage monitoring with a cell phone usage sensor. An example disclosed vehicle includes a cellphone usage sensor and a communication enforcer. The example cellphone usage sensor monitors a detection area around a driver's seat. The example communication enforcer changes an operation of the vehicle when the cellphone usage sensor detects usage of a mobile device within the detection area, a communication management feature is enabled, and the mobile device is not communicatively coupled to a wireless module of the vehicle.

A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.

A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.

A group of data symbols for a current block of data symbols in multiple blocks received over a communication channel is equalized, based on a pilot block, to generate a group of equalized symbols. The group of equalized symbols is de-rotated as a function of a current phase estimate to determine initial de-rotated equalized symbols. The phase estimate is an estimate of phase caused by noise for blocks previous to the current block. Additionally, a phase metric is calculated from real and imaginary parts of the initial de-rotated equalized symbols, wherein the phase metric estimates phase caused by noise for the current block. The current phase estimate is updated with the phase metric. The initial de-rotated equalized symbols are de-rotated by the phase metric to determine final equalized and de-rotated symbol estimates. The final equalized and de-rotated symbol estimates are output. Apparatus, methods, and computer program products are disclosed.

An apparatus and a method for accurate determination of a transfer function of a device under test (DUT) comprising a measurement unit adapted to measure a transfer function of the device under test (DUT) across a frequency range in response to a wideband signal applied by the measurement unit to the device under test (DUT), a preprocessing unit adapted to cut out data of the measured transfer function at frequencies where the applied wideband signal comprises a low spectral power density and a data processing unit adapted to process the remaining data of the measured transfer function to determine an accurate transfer function of said device under test (DUT).