Aspects of the subject disclosure may include, for example, determining that interference associated with a signal exceeds a threshold, determining at least one operating parameter associated with a user equipment to modify responsive to the determining that the interference exceeds the threshold, wherein the at least one operating parameter includes a frequency band that the user equipment uses to communicate or a clock signal frequency range of a clock of the user equipment, and transmitting a notification to the user equipment, wherein the notification includes an indication of the at least one operating parameter. Other embodiments are disclosed.

Aspects of the present disclosure provide example preamble formats with repeated signal (SIG) fields that may help provide backwards compatibility and help address the effects of larger delay spreads in various wireless bands (e.g., WiFi bands).

Embodiments of the present disclosure provide systems and methods for maintaining timing precision in different operating modes of a device (e.g., a wireless node). A timing circuit may switch clock signals between two different modes (e.g., high power and low power) while preserving timing precision. In a high-power mode, the timing circuit may provide a high frequency clock signal, and in a lower-power mode, it may provide a low frequency clock signal. Moreover, the switching between the different clock signals may be synchronized to select edges of the low frequency clock signal.

Estimation of frequency error is disclosed through use of beacon or preamble transmissions. A base station transmits one or more preamble tones at predetermined frequencies using all allocated transmission power associated with the transmission bandwidth for the one or more preamble tones. The base station then transmits its synchronization signals. A UE collects a set of samples from the received transmissions waveform and successively transforms the samples to a frequency domain. The UE may then detect the preamble tones as having at least a threshold power relative to other samples in the transformed samples. The frequency error may then be set as the difference between the detected frequency or frequencies of the received preamble tones and the known predetermined transmission frequency.

Methods and apparatus for obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between a wireless device and a network node. In one embodiment a method is performed by a wireless device for operating in a non-terrestrial network, NTN, the NTN having at least one network node and a communication satellite, wherein the at least one network node is one of a terrestrial base station and a satellite base station or satellite gateway, the method includes obtaining a frequency offset corresponding to a Doppler shift of transmission and/or reception frequencies between the wireless device and the network node and applying the frequency offset to an uplink transmission to the network node.

UE (200) includes a receiving unit (220) that receives a predetermined reference signal and a control unit (230) that performs quality monitoring of a radio link based on the reference signal. The control unit (230) determines a synchronous state of the radio link based on a first error rate threshold value or a second error rate threshold value, and even if the first error rate threshold value is changed to the second error rate threshold value at a predetermined timing, applies an evaluation period corresponding to the first error rate threshold value.

Methods and apparatuses for determining asynchronization between a first clock used by a first node (N1) and a second clock used by a second node (N2). A sequence of time differences is measured based on a sequence of signals periodically sent by the second node (N2) and received by the first node (N1), wherein each time difference of a signal is between a respective transmission timestamp in accordance with the second clock and a respective receiving timestamp in accordance with the first clock; and at least one of a relative phase offset or a relative frequency offset between the first and the second clock is estimated based on the sequence of time differences.

A measurement result receiving apparatus receives measurement results transmitted from a plurality of measuring devices, the measurement results obtained by conducting a measurement at a predetermined sampling interval according to a reference clock of each measuring device. The measurement result receiving apparatus includes a receiving section that receives the measurement results from the plurality of measuring devices; and a sampling interval converting section that converts the measurement results into measurement values associated with a common sampling interval.

Methods, apparatuses, and computer programs are provided for propagation delay compensation. A method for a UE includes receiving a configuration to provide a propagation delay notification for a propagation delay estimation; determining when the notification should be transmitted; transmitting the propagation delay notification; and determining a corresponding action based on the configuration of a relation between uplink reference signals and downlink reference signals. Methods are also provided for a radio node such as a base station.

A method for determining an angle of arrival (AOA) of a received signal is disclosed, comprising: generating a baseband information signal by mixing a received signal with a local oscillator (LO) signal, the received signal being an in-phase signal and quadrature signal uncorrelated with each other and derived from different input data sets; obtaining baseband signal samples of the baseband information signal having an in-phase signal sample and a quadrature signal sample; determining a transmitter phase offset based on an estimated correlation between the in-phase signal samples and the quadrature signal samples; performing a plurality of phase measurements using a plurality of antennas to obtain a plurality of phase measurements; correcting the plurality of phase measurements based on the transmitter phase offset to produce a plurality of corrected phase measurement; and calculating an AOA of the received signal based on the difference between the plurality of corrected phase measurements.