Certain aspects of the present disclosure relate to methods and apparatus for adaptive antenna switching for measurements, for example, in high gain automotive devices. According to certain aspects, a method is provided herein for wireless communications. The method generally includes selecting, based on one or more conditions, a first measurement configuration that uses at least an external antenna mounted on a surface of a vehicle for one or more measurements or a second measurement configuration that uses at least an internal antenna associated with the vehicle for the one or more measurements; performing the one or more measurements using the selected measurement configuration; and sending a report based on the one or more measurements. The techniques for measurement configuration selection may allow the device to achieve the benefits of both the high gain external antenna and the lower gain internal antenna(s) depending on the current conditions.

Various embodiments are described that relate to a combined signal. A signal can be transmitted from a transmitter and be received by a receiver. The receiver can be an antenna array that comprises multiple individual antenna elements. At least some of these individual elements can receive the transmitted signal at different reception angles and these received signals can be considered signal copies. The reception angle can influence a power level of a signal copy. Multiple signal copies can be combined together into a combined signal that has a greater power level than the individual signal copies used in the combination.

Systems and methods providing improved duplexer isolation are disclosed. In one embodiment, a system having improved duplexer isolation includes a duplexer system and one or more digital filters. The duplexer system includes a first transmit port, a second transmit port, a receive port, and an antenna port. The duplexer system is configured to receive a first transmit signal at the first transmit port and a second transmit signal at the second transmit port, where the first and second transmit signals are balanced transmit signals. The duplexer system is configured to combine the first and second transmit signals at the antenna port. The one or more digital filters are configured to cause destructive combining of transmit leakage signals at the receive port. As a result, the isolation of the duplexer system is substantially improved.

Certain aspects relate to methods and apparatus for wireless communication. Particularly, aspects relate to techniques for wireless communications by an apparatus including a receive processing chain configured to process frames of a first type obtained via an omnidirectional antenna and frames of a second type obtained via an antenna array, a detector configured to detect a preamble portion of a frame of the first type, and a processing system configured to switch an input path of the receive processing chain from the antenna array to the omnidirectional antenna after the detection. Other aspects relate to wireless communications by an apparatus including a processing system that generates a frame of a first type having an indication that the apparatus can switch between outputting omnidirectional frames and outputting beamforming frames for transmission independent of channel reservation signaling, and a first interface configured to output the frame of the first type for transmission.

A plurality of receivers each having: an RF amplifier having an RFAMP input coupled to an antenna and having an RFAMP output; a capacitor having a CAP first side connected to the RFAMP output and a CAP second side; a passive mixer coupled to the RFAMP input, the CAP second side, and the output of a local oscillator phase shifter; an operational transconductor amplifier having an OTA input connected to the CAP second side and having an OTA output; a feedback resistor connected between the OTA input and the OTA output; a baseband transconductor having a BBGM input connected to the OTA input and a BBGM output; a cancelling transconductor having a CANCELLER output connected to the BBGM output and having a CANCELLER input; and an attenuator between the OTA output and the CANCELLER input, wherein the OTA output of each of the plurality of receivers are connected together.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). According to various embodiments, an apparatus of a user equipment (UE) in a wireless environment comprises at least one transceiver; and at least one processor operably coupled to the at least one transceiver. The at least one transceiver is configured to receive a reference signal configuration comprising information for indicating whether a reference signal of a transmission and reception point (TRP) is transmitted through beam sweeping from the TRP, and receive the reference signal from the TRP based on the received reference signal configuration.

A receiver for demodulating wireless signal using multiple receive antennas includes multiple signal detection modules, with each module implementing a non-interference rejection combining signal detection technique. The receiver makes a decision about whether or not to use an interference rejection combining technique, and which signal detection module to use based on the operating conditions of the received signals. When the decision is made to use an interference rejection combining technique, a single whitening filter is used to whiten the received signal prior to sending the whitened signal for processing by the signal detection module. The whitening filter may be calculated as a Cholesky decomposition of an impairment covariance matrix generated from the signals received at the multiple antennas.

An analog tamper-detection apparatus (ATAMP) for onboard analysis of a target device includes a plurality of antennas, each antenna of the plurality of antennas disposed within the target device and being electrically isolated from components of the target device. The ATAMP device further includes radio frequency (RF) front-end (RFFE) transmitter circuitry coupled to the plurality of antennas, the RFFE transmitter circuitry configured to illuminate the target device with a plurality of electromagnetic signals emitted via the plurality of antennas, to generate a plurality of mixed RF signals. The ATAMP device further includes RFFE receiver circuitry configured to receive emissions from the target device based on the mixed RF signals, and processing circuitry configured to perform subsequent analysis and evaluation of the target device based on the received emissions. The processing circuitry further generates a notification of the subsequent analysis and evaluation.

A user equipment includes a transmission unit that transmits, to a base station, information indicating a specific band combination supported by the user equipment for carrier aggregation and combinations of maximum numbers of Multiple-input and multiple-output (MIMO) layers to be applied to respective component carriers of frequency bands included in the specific band combination, the combinations of the maximum numbers of MIMO layers being supported by the user equipment; and a control unit that applies a default value as the maximum numbers of MIMO layers to be applied, by the user equipment, to the respective component carriers of the frequency bands included in the specific band combination, when a signal indicating the maximum numbers of MIMO layers to be applied, by the base station, to the respective component carriers of the frequency bands included in the specific band combination is not received from the base station.

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.