The present disclosure provides a method in a receiver for frequency offset estimation. The method includes: for each of two or more pairs of symbols in a set of symbols from a transmitter: calculating a phase difference between a first symbol and a second symbol in the pair; and removing from the calculated phase difference a phase difference component due to a difference between information carried in the first symbol and information carried in the second symbol, to obtain a residual phase difference component. The method further includes: estimating a frequency offset between the receiver and the transmitter as a function of the respective residual phase difference components obtained for the two or more pairs.

An apparatus of a Wi-Fi station (STA), the apparatus including a radio frequency (RF) interface, and one or more processors coupled to the RF interface configured to: receive a first periodic training field and a second periodic training field of a preamble of a data packet; compare the first periodic training field of the preamble with the second periodic training field of the preamble; determine a first spurious tone parameter based on the comparison; receive a transmission frame of the data packet; determine a second spurious tone parameter based on the transmission frame of the data packet; and generate a frequency adjustment based on the first spurious tone parameter and the second spurious tone parameter.

A terminal includes a receiving unit configured to receive information relating to an arrangement of a tracking reference signal and a plurality of tracking reference signals based on the information relating to the arrangement of the tracking reference signal, and a controller configured to perform a Doppler estimation using two of the plurality of tracking reference signals, wherein an interval between the two of the plurality of tracking reference signals in a time domain is variable.

The disclosure relates to a wireless communication system, and relates to a method and apparatus for scheduling a plurality of user equipments (UEs) by considering a frequency selectivity. A method, performed by a base station, for transmitting or receiving data in a wireless communication system according to an embodiment includes determining a UE candidate group set based on channel state information for channels of a plurality of carriers, determining an offset used to adjust the number of UEs of the UE candidate group set, based on frequency selectivity information between a representative channel selected from among the channels of the plurality of carriers and other channels, based on the offset, determining a plurality of UEs to which data is to be transmitted, and transmitting the data to the determined plurality of UEs.

A leakage detection instrument may receive an electromagnetic signal radiated from a leakage location within a cable network system. The instrument may determine the leak based on spectral analysis and without the use of tagged or test signals.

Millimeter-wave (mmWave) and sub-mmWave technology, apparatuses, and methods that relate to transceivers and receivers for wireless communications are described. The various aspects include an apparatus of a communication device including one or more antennas configured to receive an RF signal and an ADC system. The ADC system includes a 1-bit ADC configured to receive the RF signal, and an ADC controller circuitry configured to measure a number of positive samples in the received RF signal for a plurality of thresholds of the 1-bit ADC, estimate receive signal power associated with the received RF signal based on the measured number of positive samples, determine a direct current(DC) offset in the received RF signal using the estimated received signal power, and adjust the received RF signal based on the determined DC offset.

A communication method and apparatus improve accuracy of correcting a frequency offset. Configuration information received from a network device provides for configuring one or more uplink reference signal resources each including a first time unit and a second time unit. The first time unit includes a first antenna port. The second time unit includes a second antenna port. An uplink reference signal is sent to the network device based on the configuration information.

Apparatus and associated methods relate to providing robust synchronization of a Radio-Frequency (RF) communication in a severe-fading environment. A first portion of a detected RF signal is auto-correlated with a second portion of the detected RF signal. The first and second portions are time-separated by the predetermined time delay separating the first and second code-sequences. A third portion of the detected RF signal is sync-correlated with a sync-sequence so as to generate a sync-correlation signal. The third portion is of the predetermined length of the sync sequence and includes the first and second portions of the detected RF signal used to generate the auto-correlation signal. The auto-correlation signal is multiplied by the sync-correlation signal so as to generate a combined synchronization signal. A peak in the combined synchronization signal is then detected. This peak can be indicative of a synchronization time of an authorized communication.

A method of estimating a clock frequency offset in a mobile device relative to a clock frequency of a controller within a UWB network comprises (a) determining, for each of a plurality of anchors, an anchor clock frequency offset relative to the controller clock frequency, (b) broadcasting an anchor data packet from each anchor, the anchor data packet including the respective anchor clock frequency offset, (c) receiving at least one anchor data packet at the mobile device, (d) estimating a mobile device clock frequency offset relative to the anchor clock frequency of the anchor from which the at least one anchor data packet was received, and (e) estimating the clock frequency offset in the mobile device based on the estimated mobile device clock frequency offset and the anchor clock frequency offset included in the at least one received anchor data packet. Furthermore, a TDoA-based localization method and a TDoA-based localization system are described.

Embodiments of a User Equipment (UE), generation Node-B (gNB) and methods of communication are generally described herein. The UE may receive, from a gNB, a narrowband physical downlink control channel (NPDCCH) that indicates a number of narrowband internet-of-things (NB-IoT) downlink subframes for a downlink scheduling delay of a narrowband physical downlink shared channel (NPDSCH) in one or more radio frames configured for time-division duplexing (TDD) operation. Subframes of the one or more radio frames may include uplink subframes, NB-IoT downlink subframes for downlink NB-IoT transmissions, and downlink subframes for other downlink transmissions. The UE may determine the downlink scheduling delay based on an earliest subframe for which a count of NB-IoT downlink subframes is equal to the number of NB-IoT downlink subframes indicated in the NPDCCH.