Methods and apparatuses for a User Equipment (UE) to receive signaling of UE-common Downlink Control Information (DCI) in a set of Physical Resource Blocks (PRBs) over a Transmission Time Interval (TTI) are provided. The method includes receiving, from a transmission point, a broadcast signal; determining a first set of PRBs for a first PDCCH based on the broadcast signal; determining a second set of PRBs for a second PDCCH based on a higher layer signaling; receiving, from the transmission point, first DCI on a first PDCCH in the first set of PRBs; and receiving, from the transmission point, second DCI on a second PDCCH in the second set of PRBs. A CRC of the first DCI is associated with an SI-RNTI, a CRC of the second DCI is associated with a C-RNTI, an RS is determined based on an identity of the transmission point, in a case that the RS is received in the first set of PRBs, and the RS is determined based on the higher layer signaling, in a case that the RS is received in the second set of PRBs.

The present technology relates to a transmission device, a transmission method, a reception device, and a reception method capable of improving reception performance.

A transmission device generates a transmission identification signal indicating transmission identification information for identifying a transmission device that transmits an orthogonal frequency division multiplexing (OFDM) signal, and injects a transmission identification signal at a lower level than an OFDM signal corresponding to data to be transmitted into all OFDM symbols of the OFDM signal. The reception device demodulates the OFDM signal after the injection of the transmission identification signal from the transmission device. The present technology can be applied to, for example, a transmission system that transmits and receives an OFDM signal.

Optimal determination of a Wireless Local Area Network (WLAN) sounding method and system may be provided. An Access Point (AP) selects a subchannel for the partial sounding. The AP then sounds the selected subchannel. A client station responds with Channel State Information (CSI). The AP can receive the CSI, from the client station, in response to the sounding. Based on the CSI from the selected subchannel, the AP extrapolates the CSI to determine predicted CSI for a wider bandwidth channel.

Implementations disclosed describe techniques and systems for efficient determination and tracking of trajectories of objects in an environment of a wireless device. The disclosed techniques include, among other things, obtaining multiple sets of sensing values that characterize one or more radio signals received, during a respective sensing event, from an object in an environment of the wireless device. The sensing signals may be carried by waves with randomly selected frequencies representing a portion of all frequencies that are used as working sensing frequencies. Multiple techniques of efficient frequency interpolation and temporal interpolation are disclosed that reconstruct the sensing values to the full range of working frequencies. The reconstructed sensing values may then be used to track objects in the environment.

Optimal determination of a Wireless Local Area Network (WLAN) sounding method and system may be provided. An Access Point (AP) selects a subchannel for the partial sounding. The AP then sounds the selected subchannel. A client station responds with Channel State Information (CSI). The AP can receive the CSI, from the client station, in response to the sounding. Based on the CSI from the selected subchannel, the AP extrapolates the CSI to determine predicted CSI for a wider bandwidth channel.

Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.

A method includes: receiving first signaling, wherein the first signaling comprises demodulation reference signal DMRS patterns configured for N time units, each DMRS pattern is used to indicate a quantity of DMRSs in each time unit, the quantity of DMRSs in each time unit is a total quantity of time domain symbols occupied by all DMRSs in the time unit, DMRSs configured for at least two of the N time units occupy different total quantities of time domain symbols, and N is a positive integer greater than 1; and receiving or sending data in the N time units based on the total quantity of time domain symbols occupied by all the DMRSs in each time unit.

Optimal determination of a Wireless Local Area Network (WLAN) sounding method and system may be provided. An Access Point (AP) selects a subchannel for the partial sounding. The AP then sounds the selected subchannel. A client station responds with Channel State Information (CSI). The AP can receive the CSI, from the client station, in response to the sounding. Based on the CSI from the selected subchannel, the AP extrapolates the CSI to determine predicted CSI for a wider bandwidth channel.

Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.

A method of positioning using a shortest path based on a synthesized wideband channel estimate is described. In some embodiments, a method is disclosed, comprising: distributing an uplink schedule to a plurality of synchronized nodes; continuously capturing a reference signal across a plurality of carrier frequencies until frequency coverage for the synthetic wide band is achieved; removing frequency offset; calculating a plurality of channel estimates for the captured reference signal; aligning the plurality of channel estimates; combining the plurality of channel estimates to construct a single channel estimate of the synthetic wide band; deriving a shortest delay for the received reference signal; and using the derived shortest delay to estimate a time of arrival and thereby determine an estimated location.