Abstract: An electronic device may include wireless circuitry with a phased antenna array that conveys radio-frequency signals using signal beams of first and second orthogonal polarizations. The array may sweep over a set of signal beam pairs, each including a respective combination of signal beams of the first and second polarizations. The wireless circuitry may gather performance metric values for each of the polarizations and signal beam pairs. The circuitry may generate a filtered set of signal beam pairs by removing signal beam pairs having performance metric values that differ from a maximum of the wireless performance metric values by more than a threshold. The circuitry may select a signal beam pair from the filtered set having a minimum polarization imbalance. The array may concurrently convey first and second wireless data streams using the selected signal beam pair. Minimizing polarization imbalance may maximize overall data throughput for the device.

Abstract: Some aspects of this disclosure relate to apparatuses and methods for implementing time domain bandwidth part (TD-BWP) switch for balancing between the UE power consumption and a latency of the UE. For example, a UE can be configured to add a plurality of padding bits to a transport block (TB) to reach a predetermined slot capacity for one transmission time interval (TTI) associated with UE traffic in response to determining that a parameter associated with the UE traffic meets a condition. The UE can be further configured to transmit the TB over the TTI to the base station and receive a message from the base station. The UE is further configured to change a time domain bandwidth part (TD-BWP) based on the received message.

Abstract: Some aspects of this disclosure relate to apparatuses and methods for implementing time domain bandwidth part (TD-BWP) switch for balancing between the UE power consumption and a latency of the UE. For example, a UE can be configured to add a plurality of padding bits to a transport block (TB) to reach a predetermined slot capacity for one transmission time interval (TTI) associated with UE traffic in response to determining that a parameter associated with the UE traffic meets a condition. The UE can be further configured to transmit the TB over the TTI to the base station and receive a message from the base station. The UE is further configured to change a time domain bandwidth part (TD-BWP) based on the received message.

Abstract: An electronic device may include wireless circuitry with a phased antenna array that conveys radio-frequency signals using signal beams of first and second orthogonal polarizations. The array may sweep over a set of signal beam pairs, each including a respective combination of signal beams of the first and second polarizations. The wireless circuitry may gather performance metric values for each of the polarizations and signal beam pairs. The circuitry may generate a filtered set of signal beam pairs by removing signal beam pairs having performance metric values that differ from a maximum of the wireless performance metric values by more than a threshold. The circuitry may select a signal beam pair from the filtered set having a minimum polarization imbalance. The array may concurrently convey first and second wireless data streams using the selected signal beam pair. Minimizing polarization imbalance may maximize overall data throughput for the device.

Abstract: An electronic device may be provided with first and second sidewalls, a rear wall, and a display. Multiple antenna panels may be used to convey radio-frequency signals at frequencies greater than 10 GHz. A first antenna panel may radiate through the display while second and third panels radiate through the first and second sidewalls. The second and third panels may be tilted at non-zero angles with respect to the sidewalls. The non-zero angles may be of opposite sign. The non-zero angles may have the same magnitude. The magnitude may be equal to 15 degrees, as one example. Tilting the panels in this way may allow the panels to collectively cover as much of a sphere around the device as possible, including out of coverage areas behind the rear wall caused by conductive material in the rear wall, without requiring additional panels to be disposed within the device.

Abstract: This application describes systems and processes for sensor-assisted antenna and beam selection for wireless networks. The systems and processes are configured to detect out of coverage (OoC) scenarios and perform beam management in response to detecting the OoC scenario. The systems and methods are configured to perform beam management during baseband interruption scenarios. In each scenario, the device (e.g., user equipment UE) is configured to determine whether the UE is static or mobile.

Abstract: This application describes systems and processes for beam selection performance refinement in static conditions of wireless devices (e.g., user equipment UE). A data processing system of the UE is configured to perform a beam scan for testing multiple high gain candidate beams on a physical downlink shared channel (PDSCH) and link adaptation (LA) channel state information reference signal (LA-CSI-RS) while the UE is not moving and the data processing system of the UE determines that the channel is stable. The data processing system is configured to refine a given beam choice based on a determined capacity of the beams (e.g., from PDSCH signaling and/or LA-CSI-RS signals) to optimize data throughput.

Abstract: A technique for wireless communications, comprising: determining a first channel state information (CSI) based on a current receive beam; determining a second CSI based on the current receive beam; determining a correlation metric between the first CSI and the second CSI; based a comparison between the determined correlation metric and a threshold value, determining to transmit the first or second CSI in response to a CSI reference signal (CSI-RS) received from a wireless node; determining a third CSI based on a candidate receive beam and the reference signal; and selecting the candidate receive beam based on the measured third CSI.

Abstract: A wireless device is configured to select a beam and/or an antenna based on detection a detected position and/or orientation of the device relative to a remote device. The device obtains motion data indicating a change in position or orientation of the wireless device. The device determines its pose relative to the remote device. The device accesses a coverage map that associates, for each potential pose for the device with respect to the remote device: an antenna for communicating with the remote device and/or a beam for communicating with the remote device. The device selects a particular antenna and/or a particular beam for communicating with the remote device; and causes transmission or reception of data to or from the remote device by the particular antenna and/or the particular beam.

Abstract: A method for processing a plurality of signals may include receiving one or more observations characterizing a wireless channel, performing a channel estimation to determine a probabilistic channel model for the wireless channel, and processing the plurality of signals using the probabilistic channel model. The channel estimation may include numerically updating one or more multipath gain estimates and one or more multipath delay estimates based on the one or more received observations and a probability distribution associated with the probabilistic channel model.

Abstract: Natural radio environments are emulated using field traces and a channel emulator to test radio devices. In one example, a test includes a field trace source to replay recorded field traces, a protocol tester to receive the replayed field traces to extract configuration parameters from the replayed field traces, to extract signals from the field traces, to send the signals to a device under test, and to receive signals from the device under test, and a channel emulator coupled to the field trace source, and between the protocol tester and the device under test, to receive the replayed field traces, to mix the replayed field traces with signals and to emulate the channel between the protocol tester and the device under test.

Abstract: A method (200) for channel estimation includes receiving (201) a receive symbol (206) comprising: a plurality of interfering transmissions from: a first transmit symbol (202), the first transmit symbol (202) comprising a plurality of unknown modulated symbols interleaved with a plurality of known modulated symbols and a second transmit symbol (204), the second transmit symbol (204) comprising a plurality of unknown modulated symbols interleaved with a plurality of known modulated symbols, wherein the plurality of transmissions from the first transmit symbol (202) and the second transmit symbol (204) are a plurality of transmissions of different time instances; and estimating (203) a channel based on the receive symbol (206) and a plurality of estimates of the first transmit symbol (202) and the second transmit symbol (204).

Abstract: Natural radio environments are emulated using field traces and a channel emulator to test radio devices. In one example, a test includes a field trace source to replay recorded field traces, a protocol tester to receive the replayed field traces to extract configuration parameters from the replayed field traces, to extract signals from the field traces, to send the signals to a device under test, and to receive signals from the device under test, and a channel emulator coupled to the field trace source, and between the protocol tester and the device under test, to receive the replayed field traces, to mix the replayed field traces with signals and to emulate the channel between the protocol tester and the device under test.

Abstract: Natural radio environments are virtualized to test radio devices. In one example, this is done by extracting signals and messages recorded in the field and injecting them in the operation of a protocol tester. In another example, the radio environment is reproduced by generating channel impulse responses in a ray-tracer, then interpolating them in a channel emulator and supporting the interpolation by means of post-processing. In another example, the radio environment is recorded using a mobile terminal in the field. In another example, natural radio environments are produced by reconstructing realistic cell loads and, as a consequence, intra-cell interference for a given device under test.

Abstract: A method (200) for channel estimation includes receiving (201) a receive symbol (206) comprising: a plurality of interfering transmissions from: a first transmit symbol (202), the first transmit symbol (202) comprising a plurality of unknown modulated symbols interleaved with a plurality of known modulated symbols and a second transmit symbol (204), the second transmit symbol (204) comprising a plurality of unknown modulated symbols interleaved with a plurality of known modulated symbols, wherein the plurality of transmissions from the first transmit symbol (202) and the second transmit symbol (204) are a plurality of transmissions of different time instances; and estimating (203) a channel based on the receive symbol (206) and a plurality of estimates of the first transmit symbol (202) and the second transmit symbol (204).

Abstract: A method for processing a plurality of signals may include receiving one or more observations characterizing a wireless channel, performing a channel estimation to determine a probabilistic channel model for the wireless channel, and processing the plurality of signals using the probabilistic channel model. The channel estimation may include numerically updating one or more multipath gain estimates and one or more multipath delay estimates based on the one or more received observations and a probability distribution associated with the probabilistic channel model.

Abstract: Methods, apparatus and computer program products implement frequency domain packet scheduling in a fractional load situation by detecting a fractional load situation in a wireless communications network; receiving information indicative of signal conditions in a cell; using the information indicative of signal conditions in the cell to determine physical resource blocks in use in a nearby cell; determining how many physical resource blocks are need to perform packet transmission operations in dependence on packet traffic in the cell; selecting particular physical resource blocks to be used to perform initial packet transmission operations in the cell downlink so as to avoid those physical resource blocks in use in the nearby cell; and when selecting physical resource blocks to perform future packet transmission operations in the cell downlink, favoring those physical resource blocks used to perform initial packet transmission operations.