A communication circuit arrangement includes a sub sampling circuit configured to obtain wideband signal data including candidate reference sequences from a plurality of carrier channels and to downsample the wideband signal data to shift the candidate reference sequences closer to each other in frequency, a comparison circuit configured to compare the downsampled signal data to a composite detection sequence to detect whether any of the candidate reference sequences match any of a plurality of predefined reference sequences in the composite detection sequence, and a decision circuit configured to determine whether any of the plurality of carrier channels contain an active network based on the detection results.

A technique includes receiving, by a user device from a base station in a wireless network, a frequency offset information (FOI), adjusting, by the user device, an uplink transmit frequency based on the frequency offset information, and transmitting, by the user device, at least one of data and control information to the base station based on the adjusted uplink transmit frequency.

Methods, systems, and devices for wireless communication provide for split symbol control by varying tone spacing and symbol duration for control channels in a subframe. The control symbols may be transmitted at various locations within the subframe and may be transmitted to different mobile devices. In some examples, multiple control symbols may be transmitted in a subframe to multiple mobile devices depending on the capabilities of each of the multiple mobile devices.

Provided herein is a method for performing, by a first apparatus, wireless communication and an apparatus for supporting the same. The method may include the steps of generating a Phase Tracking—Reference Signal (PT-RS), transmitting a Physical Sidelink Control Channel (PSCCH) to a second apparatus, mapping, based on a Cyclic Redundancy Check (CRC) on the PSCCH, the PT-RS to a subcarrier on a Physical Sidelink Shared Channel (PSSCH) resource related to the PSCCH, and transmitting the PT-RS to the second apparatus.

A station configured to perform a method for determining a wireless property such as a channel estimate, a channel estimation track, a time tracking loop, and a frequency tracking loop. The method includes determining a set of consecutive subframes in which no transmission is scheduled, placing a processor into a first power mode during at least a portion of the set of consecutive subframes, placing the processor into a second power mode during at least another portion of the set of consecutive subframes, receiving a first reference symbol when the processor is in the second power mode and calculating a wireless property based on the first reference symbol.

The present disclosure describes a method and an apparatus for pruning false peaks during slot synchronization at a user equipment (UE). For example, a method is provided to identify a plurality of first peaks associated with a primary-synchronization channel (P-SCH) received at the UE and a plurality of second peaks from the plurality of first peaks. Further, one or more pruning locations along with associated energy thresholds for each of the plurality of the second peaks may be determined and whether a peak of the plurality of the first peaks is a false peak is identified based on whether the peak is located at one of the one or more pruning locations of the peak and an associated energy value of the peak does not satisfy the associated energy threshold of the pruning location. Furthermore, the peak identified as the false peak is discarded.

Methods, systems, and devices for wireless communication are described. A wireless communications system operating in millimeter wave (mmW) spectrum may utilize synchronization signals for beam tracking. A synchronization signal (e.g., primary synchronization signals (PSS), secondary synchronization signals (SSS), etc.), beam reference signal, and/or control signal may be designed to facilitate beam tracking. A synchronization signal structure based on a repeated sequence in the time domain may facilitate searching for different beams in a timely manner. In some cases, the repeated synchronization signal structure may be achieved by using a larger tone spacing, and hence having shorter symbol duration and repeating the short symbols in the time domain. The repeated structure may be further used to encode additional information (e.g., facilitated by the resulting additional degrees of freedom). Additionally or alternatively, a synchronization signal (e.g., SSS) may be discrete Fourier transform (DFT) pre-coded to achieve better peak-to-average-power-ratio (PAPR).

In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.

In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.

After an electroconductive projection is formed on an electrode of an electronic element, a gas barrier film on which an adhesive layer and a contact hole are formed is laminated and pressure-bonded onto a substrate on which the electronic element is formed. Alternatively, after a gas barrier film on which an adhesive layer and a contact hole are formed is laminated on a substrate on which an electronic element is formed and an electroconductive projection is formed on the electrode inside the contact hole, the substrate and the gas barrier film are pressure-bonded to each other, and the contact hole is filled with an electroconductive material. In this manner, there are provided a method of manufacturing an electronic device; and an electronic device to which a take-out wire used to reliably connect the electronic device to an external device using a small contact hole can be connected even in a case where the electronic device is small.