Devices, systems and methods for operating a rear-facing perception system for vehicles are described. An exemplary rear-facing perception system contains two corner units and a center unit, with each of the two corner units and the center unit including a camera module and a dual-band transceiver. A method for operating the rear-facing perception system includes pairing with a control unit by communicating, using the dual-band transceiver, over at least a first frequency band, transmitting a first trigger signal to the two corner units over a second frequency band non-overlapping with the first frequency band, and switching to an active mode. In an example, the first trigger signal causes the two corner units to switch to the active mode, which includes orienting the camera modules on the center unit and the two corner units to provide an unobstructed view of an area around a rear of the vehicle.

This disclosure describes systems, methods, and devices related to wake up receiver (WUR) frequency division multiple access (FDMA) transmission. A device may cause to send a wake up receiver (WUR) beacon frame on a WUR beacon operating channel to one or more station devices. The device may determine a first wake-up frame to be sent on a first WUR operating channel, wherein the first WUR operating channel is associated with one or more frequency division multiple access (FDMA) channels used for transmitting one or more wake-up frames to the one or more station devices. The device may determine to apply padding to the first wake-up frame based on a field included in a header of the first wake-up frame. The device may cause to send the first wake-up frame to a first station device of the one or more station devices.

Methods, systems, and devices for wireless communications are described. In some systems, a base station may transmit to a user equipment (UE) over a control channel (e.g., a downlink control channel) and the UE may monitor for the control channel in a control resource set (CORSET). The control channel and the CORESET may be associated with a set of transmission configuration indicator (TCI) states. The base station and the UE may identify an association between the resources of the CORESET and the set of TCI states based on a frequency division multiplexing (FDM) mapping between the resources of the CORESET and the set of TCI states. In some examples, the association may be a fixed rule at the UE. In other examples, the base station may signal the association to the UE via control signaling. The UE may decode the control channel based on the FDM mapping.

Techniques for processing of symbols (e.g., orthogonal frequency division multiplexing (OFDM) or single carrier-frequency division multiple access (SC-FDMA) symbols) provide enhanced out-of-band (OOB) suppression of the symbols and also provide reduced inter-symbol interference (ISI) between a symbol and a subsequent symbol. Multiple frequency tones of a symbol may be divided into two or more subsets of tones. For example, subsets of tones associated with a head portion or a tail portion of an OFDM symbol may be processed with a relatively long weighted overlap-add (WOLA) weighting length or filtering length, and a subset of tones associated with a center portion of the OFDM symbol may be processed with a relatively short WOLA weighting length or filtering length. Such heterogeneous processing of tones within a symbol may provide enhanced inter-channel interference (ICI) and improved OOB suppression and also provide reduced ISI for the center tones of the symbol.

In some implementations, a method in a wireless network includes allocating a radio resource to a plurality of transmitters. The radio resource is configured for simultaneously transmitting and receiving user data with varying transmission delays. User data bursts are received, from the plurality of transmitters, with varying transmission delays transmitted over the allocated radio resource with varying resource identities.

A transmitter, a receiver and methods therein, configured to transmit a first type of synchronisation signal, in M.sub.1 symbols l.sub.i,, 0≤i≤(M.sub.1−1) and a second type of synchronisation signal in M.sub.2 symbols k.sub.j,, 0≤j≤(M.sub.2−1) of a subframe, wherein M.sub.2≥M.sub.1≥2. The transmitter comprises a processor, configured to determine in which symbols l.sub.i the synchronisation signal of the first type is to be transmitted, and in addition configured to calculate in which symbols k.sub.j, the synchronisation signal of the second type is to be transmitted, by placing each of the M.sub.2 symbols k.sub.j at a symbol distance from an associated symbol l.sub.i. The transmitter also comprises a transmitting circuit configured to transmit the synchronisation signals of the first type in the M.sub.1 symbols l.sub.i, and transmitting the synchronisation signals of the second type in the M.sub.2 symbols k.sub.j.

In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.

This disclosure describes systems, and methods related to parallel transmission of high efficiency SIGNAL field in communication networks. A device may generate a high efficiency preamble in accordance with a high efficiency communication standard, the high efficiency preamble including, at least in part, one or more legacy SIGNAL fields, one or more high efficiency SIGNAL fields, and one or more channel training fields. The device may cause to send the one or more channel training fields to one or more first devices. The device may determine one or more spatial channel streams associated with at least one of the one or more first devices, the one or more spatial channel streams includes a first stream and a second stream. The device may partition the at least one of the one or more high efficiency SIGNAL fields into, at least in part, a common part and one or more user-specific parts, the one or more user-specific parts includes a first user-specific part and a second user-specific part. The device may cause to send at least one of the one or more user-specific parts using the one or more spatial channel streams.

A communications node operable to communicate with another communications node over a communications channel having a plurality of frequency resources, the communications node includes data defining a division of the communications channel into a plurality of contiguous sub-bands each having N frequency resources, wherein each frequency resource in a sub-band has a corresponding frequency resource in each of the other sub-bands, data defining an initial allocation of the frequency resources, a resource determination module operable to apply a frequency shift to the initially allocated frequency resources in accordance with a frequency hopping sequence to determine frequency resources to use for communicating information with the other communications node, wherein the frequency shift applied moves the initially allocated frequency resources to corresponding frequency resources in another sub-band, a transceiver for communicating information with the other communications node using the determined frequency resource.

Provided are a method and device for sharing resources between stations in a Wireless Local Area Network (WLAN). A primary node receives a radio frame sent by a secondary node, the secondary node being a secondary node that gains a Transmission Opportunity (TXOP), and Uplink Multi-User (UL MU) shared information is carried in the radio frame; and the primary node sends a feedback frame to the secondary node in response to the radio frame, the feedback frame carrying multi-user information of shared secondary node(s), and the shared secondary node(s) being one or more secondary nodes that perform UL MU shared transmission with the secondary node which gains a TXOP.