Embodiments of the present disclosure provide methods, apparatuses and computer program for spatial pre-processing of signals in a wireless communication system. The method is implemented at a receiving device side and comprises: receiving signals from a transmitting device via a plurality of antennas; and determining, for a resource unit, a spatial pre-processing scheme to be applied to the signals before baseband processing, based on information related to one or more of the received signals, the transmitting device and the receiving device. The method may provide enhancement of signal strength, reduction in complexity of baseband processing, and/or reduction in amount of data to be transmitted over various interface within the receiving device.

Automotive radar systems may employ a reconfigurable connection of antennas to radar transmitters and/or receivers. An illustrative embodiment of an automotive radar system includes: a radar transmitter; a radar receiver; and a digital signal processor coupled to the radar receiver to detect reflections of a signal transmitted by the radar transmitter and to derive signal measurements therefrom. At least one of the radar transmitter and the radar receiver are switchable to provide the digital signal processor with signals from each of multiple combinations of transmit antenna and receive antenna.

Multi-beamwidth radio frequency (RF) beamforming optimization in a wireless communications apparatus is disclosed. The wireless communications apparatus includes a signal processing circuit configured to process an RF communications signal for radiation in a set of RF beams optimized to maximize coverage in a wireless communications cell. In examples disclosed herein, the set of RF beams includes a center RF beam and a number of edge RF beams. Specifically, the center RF beam is formed with a wider beamwidth to cover a larger center area of the wireless communications cell and, the edge RF beams are each formed with a narrower beamwidth to improve coverage in an edge area of the wireless communications cell. As a result, it may be possible to maximize coverage in the wireless communications cell with fewer RF beams, thus helping to reduce computational complexity, processing latency, and energy consumption of the wireless communications apparatus.

A processing platform in illustrative embodiments comprises one or more processing devices each including at least one processor coupled to a memory. The processing platform is configured to extract channel features of a wireless channel of a wireless system from channel state information characterizing a radio geometry of the wireless channel, to generate a forward charting function that maps the extracted channel features to a channel chart characterizing a representational spatial geometry of the wireless channel, and to utilize the channel chart to estimate at least one position-related characteristic of one or more wireless devices in an actual spatial geometry of the wireless channel. Generating the forward charting function illustratively comprises performing an unsupervised learning process to learn the forward charting function from the extracted channel features. The channel chart is illustratively configured to preserve local geometry of multiple spatial locations associated with the extracted features in the actual spatial geometry of the wireless channel.

Described herein are variable gain amplifiers and multiplexers that embed programmable attenuators into switchable paths to provide variable gain for individual amplifier inputs. The variable gain for an individual input is provided using an amplification stage that is common for each input of the amplifier. A variable attenuation is provided for individual inputs through a combination of a band selection switch and an attenuation selection branch. Individual inputs can be configured to bypass the variable attenuation in a high gain mode.

A method for wireless communication involving high-reliability ultra-reliable low latency communication (URLLC) control and data channel transmissions is disclosed. The method includes receiving, by a user equipment (UE), first downlink control information (DCI) in a first control resource set (CORESET), the first DCI providing scheduling information for transmission of first data over a first physical downlink shared channel (PDSCH), receiving, by the UE, second DCI in a second CORESET, the second DCI providing scheduling information for transmission of second data over a second PDSCH. The method also includes receiving, by the UE, the first data over the first PDSCH, and receiving, by the UE, the second data over the second PDSCH, where the first data and the second data are repetition data.

Disclosed herein is a new type of fully-connected, hybrid beamforming transceiver architecture. The transceiver described herein is bi-directional and can be configured as a transmit beamformer or a receive beamformer. A method and apparatus are described that allows the beamformer to operate in “carrier aggregated” mode, where communication channels in multiple disparate frequency bands can be simultaneously accessed.

Phase or amplitude compensation for beam-former Apparatus for an antenna with a plurality of antenna elements, the antenna providing a radiation pattern including one or more beams and the apparatus comprising: a digital beam-former for digitally weighting component signals corresponding to the one or more beams with respective beam-forming weights to provide each component signals of a beam with a phase relationship and amplitude relationship to other component signals of the same beam; and a processing arrangement for processing signal for the beam-former or for processing signals received from the beam-former; the apparatus further comprising compensation means for compensating for at least one out of phase and amplitude distortions between component signals associated with the same frequency channel and related to the same beam arising in the processing arrangement.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may receive a beamformed signal from a transmitting device. The wireless device may estimate a weighted sum based at least in part on one or more coefficients that relate to impairments associated with the transmitting device, a spatial location of the wireless device, and/or the like. The wireless device may determine a cryptographic key based at least in part on a ratio among the plurality of coefficients in the weighted sum, and one or more communications between the wireless device and the transmitting device may be secured based on the cryptographic key. Numerous other aspects are provided.

Disclosed herein is a new type of fully-connected, hybrid beamforming transceiver architecture. The transceiver described herein is bi-directional and can be configured as a transmit beamformer or a receive beamformer. A method and apparatus are described that allows the beamformer to operate in carrier aggregated mode, where communication channels in multiple disparate frequency bands can be simultaneously accessed.