A communication device receives a physical layer (PHY) protocol data unit (PPDU). The PPDU includes i) a PHY preamble and ii) PHY data portion that includes one or more PHY midambles, and the PHY preamble includes i) an indication of a length of the PPDU, and ii) an indication of a periodicity of PHY midambles in the PHY data portion. The communication device calculates a number of PHY midambles in the PPDU using i) the indication of the length of the PPDU, and ii) the indication of the periodicity of PHY midambles. The communication device calculates a reception time for the PPDU using the calculated number of PHY midambles, and processes the PPDU using the calculated reception time.

In a vehicular communication network, a communication device generates a physical layer (PHY) preamble of a PHY protocol data unit (PPDU) for transmission in the vehicular communication network. The communication device generates a plurality of PHY data segments of the PPDU, and one or more PHY midambles, each PHY midamble to be transmitted between a respective pair of adjacent PHY data segments, and each PHY midamble including one or more training signal fields. Generating the one or more PHY midambles includes, when the PPDU is to be transmitted according to an extended range (ER) mode, generating each training signal field to include i) a first portion based on a very high throughput long training field (VHT-LTF) defined by the IEEE 802.11ac Standard and ii) a second portion based on the VHT-LTF defined by the IEEE 802.11ac Standard; and transmitting, by the communication device, the PPDU in the vehicular communication network.

A method for determining a physical sidelink feedback channel resource and an apparatus are provided. The method includes: a first terminal device sends multicast information to at least two second terminal devices. The first terminal device determines, based on a total quantity of terminal devices in a multicast group and a resource group of physical sidelink feedback channel resources, a physical sidelink feedback channel resource corresponding to each second terminal device. The first terminal device receives, based on the physical sidelink feedback channel resource corresponding to each second terminal device, feedback information sent by each of the at least two second terminal devices. According to the foregoing method, physical sidelink feedback channel resources can be allocated to the terminal devices in the multicast group.

Methods, systems, and devices for wireless communications are described. A device may receive an indication of a subcarrier spacing (SCS) for communications in a plurality of transmission time intervals (TTIs), where a TTI include a set of symbols, a corresponding set of cyclic prefixes, and a padding duration. The device may receive a control signal indicating a configuration for the padding duration, at least a portion of which may be reallocated as one or more additional symbols with corresponding one or more additional cyclic prefixes. In some examples, the one or more additional cyclic prefixes and at least a first portion of the set of cyclic prefixes may be reduced in duration in comparison with a remaining portion of the set of cyclic prefixes. The device may communicate during the padding duration using the one or more additional symbols and the corresponding one or more additional cyclic prefixes.

A method for the OTFS coded transmission of data. To improve the bit error rate for transmission of OTFS-coded signals that are processed based on integer Doppler shifts, the guard interval is expanded over the complete Doppler dimension or, alternatively, the guard interval extends over the complete delay dimension of the OTFS-coded frame in situations of either large Doppler shifts or large delays, especially as the quadruple of the Doppler shifts approaches or exceeds the extension of the Doppler domain in the OTFS frame or twice the delay delays approach or exceeds the extension of the delay domain in the OTFS frame.

An electronic circuit includes a baseband (BB) integrated circuit (IC) semiconductor device connected to a radiofrequency (RF) IC semiconductor device through a digital interface. The BB IC semiconductor device is configured to generate time domain uplink data including symbols. The RF IC semiconductor device has a fast Fourier transfer (FFT) module configured to convert time domain downlink data to frequency domain downlink data and an inverse fast Fourier transfer (IFFT) module configured to convert frequency domain uplink data to time domain uplink data. The digital interface is configured to transfer the frequency domain uplink data and the frequency domain downlink data between the BB module and the RF module.

An uplink transmission method and apparatus. The method includes: receiving by a terminal equipment indication information, wherein the indication information does not include an indication field used for indicating RB set, the indication information scheduling uplink transmission on an uplink bandwidth part including at least two resource block sets; and transmitting the uplink transmission on at least one predefined or preconfigured resource block set.

An apparatus, implemented in a user equipment (UE), transmits a report of a per-span based capability of the UE to a network node of a wireless network. The apparatus also performs physical downlink control channel (PDCCH) monitoring using a configuration that satisfies a requirement for a gap separation with respect to spans for at least one candidate value set in the report in every slot including cross-slot boundaries.

A method for transmitting control information, a network device, and a terminal device are provided. The method includes determining a cyclic shift value according to a configuration of an uplink control channel sequence; wherein the cyclic shift value is one of at least two cyclic shift values of the uplink control channel sequence and wherein the configuration of the uplink control channel sequence comprises at least one of an initial cyclic shift value, a cyclic shift difference value, or a quantity of cyclic shift values. The method also includes receiving uplink control information (UCI) from a terminal device according to the determined cyclic shift value.

In one embodiment, an apparatus comprises: a baseband processor having a preamble generation circuit to generate a preamble for an orthogonal frequency division multiplexing (OFDM) transmission, the preamble generation circuit to generate the preamble having a first portion comprising a first plurality of symbols and a second portion comprising a second plurality of symbols, where the preamble generation circuit is to generate at least some of the second plurality of symbols having at least one frequency disruption between successive symbols of the second portion; a digital-to-analog converter (DAC) coupled to the baseband processor to convert the first plurality of symbols and the second plurality of symbols to analog signals; a mixer coupled to the DAC to upconvert the analog signals to radio frequency (RF) signals; and a power amplifier coupled to the mixer to amplify the RF signals.