The present application describes a computer-implemented method for configuring a front end including receiving a first signal and a second signal containing interference; characterizing the receive channel using the first tone; processing the compensated first signal using an infinite impulse response filter based on the characterized receive channel to generate an interference cancelling signal; and coupling the interference cancelling signal to the second signal to generate an interference cancelled receive signal. The present application also describes a computer-implemented apparatus for a front end.

A disclosed feature of the present specification provides a method for user equipment estimating a channel. The method may comprise the steps of: receiving two or more cell-specific reference signals (CRSs); dividing the two or more CRSs into two groups depending on an antenna port number; executing Doppler frequency tracking with respect to the respective divided groups; and estimating a single frequency network (SFN) channel based on the result of Doppler frequency tracking executed for the respective groups.

There is provided mechanisms for purpose-dependent determination of start of a receiver symbol processing window. A method is performed by a wireless transceiver unit. The method comprises receiving, from another wireless transceiver unit, a reference signal based on which the start of the receiver symbol processing window is to be determined. The reference signal is to be processed for a processing purpose selected from a set of at least two different processing purposes. The method comprises determining a synchronization time offset from measurements on the reference signal according to an estimation process that is a function of the processing purpose. The synchronization time offset defines placement of the start of the receiver symbol processing window. According to the estimation process, the start of the receiver symbol processing window is placed differently with respect to the at least two different processing purposes.

A method of finding a direction of an ultra-wide band (UWB) using a difference between antenna beam patterns includes receiving a signal from a target device through at least one antenna configured to form a plurality of different beam patterns, obtaining a channel impulse response (CIR) of the received signal for each of the plurality of beam patterns, and finding the direction of the target device based on the CIR.

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.

A method for use in a wireless communication system comprising a transmitter and a receiver, the method comprising receiving, in the receiver, data comprising a plurality of channel-distorted synchronization codes and plurality of channel-distorted cipher codes, generating a receiver cipher sequence, the receiver cipher sequence comprising a plurality of receiver cipher codes, analyzing the received data to identify correlations between the plurality of channel-distorted cipher codes in the received data and the plurality of receiver cipher codes, accumulating the identified correlations as accumulator data in an accumulator, identifying one or more peaks in the accumulator data, identifying a first correlation peak in the accumulator data that meets one or more criteria and using the first correlation peak to identify the first path of a data packet from the transmitter.

An ultra-wideband sensor transmits impulse radio signals at different times and generates respective channel impulse responses that describe a respective reflected signal as a function of a path delay. The channel impulse responses are used to generate a time-variant channel impulse response in which the channel impulse responses are arranged according to the times of transmission of the respective associated impulse radio signals. At least one respective local maximum of the scatter function quantity, characterized by a respective Doppler frequency and a respective path delay, is detected in scatter functions of respective time windows. A predetermined selection method is used to select at least one local maximum as the respective observation maximum to be tracked for motion detection. A signal characteristic of the channel impulse response is generated for the respective observation maximum to be tracked and a predetermined motion detection method detects at least one predetermined movement.

A method, system and apparatus are disclosed. In one or more embodiments, a method in a wireless device is provided. The wireless device is configured to communicate with a network node. The wireless device receives an extended signal transmitted by the network node. The extended signal includes a base signal and at least one additional signal. The wireless device estimates a time of arrival, TOA, based on the extended signal.

A method for use in a wireless communication system comprising a transmitter and a receiver, the method comprising receiving, in the receiver, data comprising a plurality of channel-distorted synchronization codes and plurality of channel-distorted cipher codes, generating a receiver cipher sequence at the receiver, the receiver cipher sequence comprising a plurality of receiver cipher codes, analysing the received data to identify correlations between the plurality of channel-distorted cipher codes in the received data and the plurality of receiver cipher codes, accumulating the identified correlations as accumulator data in an accumulator, identifying one or more peaks in the accumulator data, identifying a first correlation peak in the accumulator data that meets one or more criteria and using the first correlation peak to identify the first path of a data packet from the transmitter.

A transceiver may include a transmitter device, a receiver device, a secondary receiver device, and switching elements. The transmitter device may provide a transmit control signal on first and second channels. The receiver device may receive a receive control signal on the first and second channels. The secondary receiver device may monitor occupation of the first and second channels without decoding at least a portion of control signals concurrent with the receiver device receiving the receive control signal. The switching elements may control when the transmitter device provides the transmit control signal to one of and is electrically isolated from first and second antennas, the receiver device receives the receive control signal from one of and is electrically isolated from the first and second antennas, and the secondary receiver device monitors occupation of one of the first and second channels and is electrically isolated from the first and second antennas.