The present application describes a method for characterizing a self-interference channel of a frequency division duplex transceiver including a transmitter and a receiver. The method includes transmitting, from a transmitter of a frequency division duplex transceiver in a transmission band, a transmission signal including a message signal and a swept tone that changes frequency from below an upper edge to above a lower edge of a reception band of a receiver, the self-interference channel being defined between the transmitter and the receiver of the frequency division duplex transceiver, such that at least a portion of the message signal leaks into a signal received the receiver, determining, at an infinite impulse response (IIR) filter of the receiver, an infinite impulse response of the self-interference channel based upon a reception of the swept tone swept at each frequency in the reception band, and estimating the self-interference channel, based upon the infinite impulse response.

A transceiver configured to: determine a reference frequency offset relative to a second transceiver based on double sided ranging; correct first and second portions of a packet received from a respective first and second antenna; and determine an angle of arrival of the packet based on corrected first and second portions and the reference frequency offset.

Wireless communication wherein channel estimation accuracy is improved while keeping the position of each bit in a frame, even when a modulation system having a large modulation multiple value is used for a data symbol. An encoding operation encodes and outputs transmitting data (bit string) and a bit converting operation converts at least one bit of a plurality of bits constituting a data symbol to be used for channel estimation, among the encoded bit strings, into 1 or 0. A modulating operation modulates the bit string inputted from the bit converting operation by using a single modulation mapper and a plurality of data symbols are generated.

The present disclosure is directed to simultaneous channel sounding on multiple MLO channels followed by determining phase and amplitude corrections based on channel impulse responses obtained on each MLO channel. The corrections are then used in subsequent extrapolation of channel sounding on one channel to another. In one aspect, a method includes transmitting, on each radio interface of a first multi-link device, a corresponding sounding probe to a second multi-link device; determining, by each radio interface of the first multi-link device, a corresponding channel impulse response based on the corresponding sound probe to yield a plurality of channel impulse responses; determining an offset between the plurality of channel impulse responses; and using the offset during a subsequent extrapolation of a sounding probe on one radio interface to a second radio interface of the first multi-link device.

Methods of operating a radio access network (RAN) node in a communication network. Methods include operations of receiving valid channel data from multiple user equipment (UE) devices. The channel data includes channel impulse response distribution data corresponding to the UE devices. Operations include generating a virtual UE based on a first delay spread of a first UE device of the UE devices in a multiple user multiple input multiple output (MU-MIMO) scheduling configuration.

Systems, methods, and computer-readable medium are provided for utilizing a hybrid of ultra-wideband (UWB) and narrowband (NB) signaling to provide more efficient operating range and operating efficiency. For example, a first device may schedule transmission of a packet via a narrowband signal to a second device. The first device may then transmit the packet, whereby the packet conveys synchronization data that is used by the second device to schedule reception of a plurality of fragments, respectively, via an ultra-wideband (UWB) signal. The first device may then schedule and transmit the plurality of segments to the second device via the ultra-wideband signals, each fragment being time-spaced from other fragments of the plurality of fragments by at least a predefined time interval.

A method and apparatus for detecting and locating a fault in a cable network. A cable modem may perform channel estimation to obtain a time domain channel response on an echo channel in a cable network. The cable modem then analyzes the time domain channel response to determine whether there is any change from a previously obtained time domain channel response on the echo channel. If there is a change from the previously obtained time domain channel response, the cable modem may generate an alert for a fault in the cable network and estimate a location of the fault based on the time domain channel response. Calibration may be performed to determine a reference latency for a reflection occurred inside the cable modem, and the location of the fault may be estimated based on the reference latency.

Techniques are provide for neural network based positioning of a mobile device. An example method for measuring a channel in a wireless communication system includes: receiving reference signal information; determining one or more channel frequency responses based on the reference signal information and one or more timing hypotheses; determining one or more channel impulse responses comprising a channel impulse response for each of the one or more channel frequency responses; processing the one or more channel impulse responses with a neural network; and determining an output of the neural network.

Disclosed herein are systems, methods and/or computer programs for determining time and/or angle-based measurements for use in position determination. The apparatus may comprise means for receiving, at a plurality of antennae, a reference signal associated with positioning and determining cross-correlation values comprising a cross correlation between the reference signal received at each antenna and a known reference signal associated with positioning. There may also be provided means for estimating a channel response for a reference antenna of the plurality of antennae using the cross correlation values, the known reference signal and an antenna correlation comprising a known relationship between a channel response of each antenna of the plurality of antennae and the channel response of the reference antenna, and determining a time of arrival and/or an angle of arrival of the received reference signal based on the estimated channel response for the reference antenna.

In one embodiment, an electronic device may include a plurality of antennas, at least one wireless communication module configured to transmit and receive wireless signals through the plurality of antennas, and at least one processor operatively connected to the wireless communication module. The at least one wireless communication module or the at least one processor may be configured to, based on one or more ultra-wide band (UWB) signals received from a target device, obtain first pieces of phase information corresponding to first channel impulse response (CIR) indices and second pieces of phase information corresponding to second CIR indices, and determine information on the one or more UWB signals based on a slope between the first pieces of phase information and a slope between the second pieces of phase information.