Abstract: An antenna adjusting method includes: transmitting a first broadcast message in a case that a plurality of antennae are in a SISO mode, and acquiring radiation efficiencies of the plurality of antennae; and maintaining the SISO mode in a case that the radiation efficiency of at least one of the plurality of antennae is less than a preset threshold.

Abstract: A method performed in a wireless device is disclosed. The present disclosure provides a method, performed in a wireless device, for polarization reporting. The wireless device is configured to communicate with a network node using a plurality of antenna panels of the wireless device, including a first antenna panel. The method comprises generating, based on one or more polarization properties of the first antenna panel, a first polarization indicator associated with a first identifier. The first identifier is indicative of the first antenna panel. The method comprises transmitting a capability report to the network node, the capability report comprising the first polarization indicator associated with the first identifier.

Abstract: An enhanced quadrature receive serial interface circuit and methods are provided for calibrating the quadrature receive serial interface circuit. A quadrature receive serial interface circuit comprises a first phase rotator and a second phase rotator generating quadrature clocks of identical frequency. Calibration of the quadrature receive serial interface circuit uses a pseudo random bit sequence (PRBS) received by the quadrature receive serial interface circuit. For calibration, one-half of the received PRBS bits are sampled and the phase rotator generating in-phase 0° and 180° clock signals is adjusted to center the data eye for the sampled half of the PRBS bits. Then all data bits (even and odd data bits) of the received PRBS bits are sampled and the phase rotator generating quadrature phase 90° and 270° clock signals is adjusted to center the data eye of all data bits of the PRBS bits to complete calibration.

Abstract: Aspects of quadrature phase shift keying for quadrature amplitude modulation are described. In some examples, quadrature phase shift keying signals are generated using quadrature phase shift keying modulators. The quadrature phase shift keying signals are combined in a combiner circuit to generate a quadrature amplitude modulation signal for wireless transmission.

Abstract: A method and apparatus are provided in which a set of reference signals is received (2102), and a set of channel signatures for a multiple antenna communication channel is estimated (2104). Channel state information including a set of quality metrics is calculated (2106). In response to the set of quality metrics satisfying a criterion, the baseline receiver for the multiple antenna communication channel is selected (2108). In response to the set of quality metrics not satisfying the criterion, the alternative receiver for the multiple antenna communication channel is selected (2110). The selectable alternative receiver for the multiple antenna communication channel at the user equipment is based on a set of integer linear combinations, where each integer linear combination is based on at least a pair of channel signatures from the estimated set of channel signatures (2112).

Abstract: According to an aspect, a wireless node selects a set of reference signal antenna ports for use in transmitting data to other wireless nodes in a given transmit time interval, from a plurality of sets of reference signal antenna ports that are available for use and that include reference signal antenna ports having different reference signal densities in the frequency and/or time dimension. The wireless node sends a message to a second wireless node indicating a reference signal assignment and including an indication of the selected set of reference signal antenna ports.

Abstract: Aspects of the present disclosure generally pertains a system and method for wireless inter-networking between a wireless wide area network (WWAN) and a local area network (WLAN) employing one or more extended range wireless inter-networking devices. Aspects of the present disclosure more specifically are directed toward a high powered wireless interconnect device that includes high efficiency circuitry to make it possible to implement in a portable or in-vehicle form factor, which may provide reasonable battery life, size, weight, and thermal dissipation. An extended range wireless inter-networking device, according to another embodiment of the disclosure. Aspects of the present disclosure further include a portable wireless access point configured for extended range communications, which may include a high power user equipment (“HPUE”) as disclosed herein.

Abstract: Various embodiments of the present disclosure relate to a method of operating an electronic device comprising: identifying that a first antenna module among a plurality of antenna modules is unusable; changing a first beam set of the plurality of antenna modules to a second beam set including at least one sub beam to cover at least a part of the coverage of the first antenna module; and performing communication based on the second beam set.

Abstract: Systems and methods for synthesis of a modulated RF signal using a variety of modulation schemes are described. An embodiment includes a direct frequency synthesizer with frequency modulated continuous wave (FMCW) modulation that includes: a high speed BAW resonator that generates a frequency signal; a BAW oscillator that receives the frequency signal and generates an output BAW clock signal (BAW CLK); a frequency and phase estimation circuit that receives a reference clock signal from a reference clock (REF CLK) and the BAW CLK and generates a frequency error and a phase error; a frequency chirp generator that receives chirp parameters, a chirp sync signal and generates a nominal frequency control word (FCW); and a high speed digital to analog converter (HS DAC) that receives the BAW CLK and the codeword and outputs an analog signal.

Abstract: A system (1) for beamforming of incoming radio-frequency signals is provided. The system includes at least one digital signal processor, DSP, a plurality of analogue-to-digital converters, ADC, each connected to the at least one DSP. Further, the system comprises a plurality of sample-and-hold, S&H, circuit groups, each comprising a plurality of sample-and-hold circuits additively connected to a respective ADC and a plurality of receiving antenna connections each connected to a respective S&H circuit in each group at one end and each antenna connection connected to a respective antenna. The system is configured to selectively alternate between a plurality of beamforming functionalities, wherein the receiver system is arranged to time-interleave the ADCs and control specific S&H circuits in each S&H group by at least one of time-interleave or disable specific S&H circuits depending on a set beamforming functionality. An associated method (100) is also provided.

Abstract: Aspects of the present disclosure facilitate assessment of radio frequency (RF) exposure from a wireless device supporting multiple-input-multiple-output (MIMO) transmissions using multiple antennas. In certain aspects, MIMO RF exposure distributions for one or more MIMO transmissions are determined and stored in a memory. To assess RF exposure for a MIMO transmission, a processor may retrieve the corresponding MIMO RF exposure distributions from the memory, linearly combine the MIMO RF exposure distributions to obtain a combined MIMO RF exposure distribution, and assess RF exposure compliance based on the combined MIMO RF exposure distribution. In one example, the MIMO RF exposure distribution may include MIMO specific absorption rate (SAR) distributions.

Abstract: A computer-implemented method for operating an access node includes receiving from a user equipment (UE), information on a maximum number of multiple input multiple output (MIMO) layers supported by the UE for an operation bandwidth within a system bandwidth operated by the access node, scheduling for the UE, a bandwidth in accordance with the maximum number of MIMO layers supported by the UE, sending to the UE, allocation information related to the bandwidth, and communicating with the UE, a data frame on the bandwidth.

Abstract: The present invention provides methods, apparatus and systems for improving a systems-level data rate on a communications link such as the orthogonal frequency division multiplexed multiple access (OFDMA) downlink used in WiFi and LTE cellular/wireless mobile data applications. The present invention preferably uses a form of multilevel coding and decoding known as tiled-building-block encoding/decoding. With the present invention, different receivers coupled to different parallel downlink channels with different channel qualities decode different received signal constellations at different levels of resolution. This allows the downlink of the OFDMA system to operate with a significantly higher data rate, thus eliminating existing inefficiencies in the downlink and significantly increasing system level bandwidth efficiency.

Abstract: A radio frequency (RF) circuit includes an input terminal configured to receive a reception signal from an antenna; an output terminal configured to output a digital output signal; a receive path including a mixer and an analog-to-digital converter (ADC), wherein the receive path is coupled to and between the input and output terminals, wherein the receive path includes an analog portion and a digital portion, and wherein the ADC generates a digital signal based on an analog signal received from the analog portion; a test signal generator configured to generate an analog test signal injected into the analog portion of the receive path; and a digital processor configured to receive a digital test signal from the digital portion, the digital test signal being derived from the analog test signal, analyze a frequency spectrum of the digital test signal, and determine a quality of the digital test signal.

Abstract: Certain aspects of the present disclosure provide object detection based on perturbations in a channel model over time. An example portable apparatus includes a primary antenna, a secondary antenna, a transmit path, a radio frequency (RF) coupler, and a receive path. The transmit path is coupled to the primary antenna and configured to output a transmit signal for transmission via the primary antenna. The RF coupler is coupled to the secondary antenna. The receive path has an input selectively coupled between the transmit path and the RF coupler such that when the receive path is coupled to the RF coupler and configured to operate concurrently with the transmit path, the receive path is configured to receive a reflected portion of the transmit signal from an object located in proximity to the portable apparatus.

Abstract: Systems, methods, and apparatuses disclosed herein can compensate for imbalances between multiple transport streams of an uplink (UL)-multiple-input and multiple-output (MIMO) transmission. These systems, methods, and apparatuses can adjust one or more signal metrics of multiple recovered transport streams of the UL-MIMO transmission that are received in the presence of imbalances between the multiple transport streams of the UL-MIMO transmission. As an example, these systems, methods, and apparatuses can inject noise into one or more of the multiple recovered transport streams to adjust the one or more signal metrics of the multiple recovered transmission streams to lessen the imbalances between the multiple transmission streams.

Abstract: An isolated gate driver includes a first input terminal to receive gate information and one or more input terminals to receive configuration information. A modulation circuit generates a modulated signal having four possible states, each of the four possible states corresponding to a different unique pair of values of the gate information and the configuration information. The modulation circuit represents two of the states using on-off keying (OOK) while the configuration information is at a first value and represents two of the states as a modification to the OOK modulation based on the configuration information being at a second value. The modulated signal is sent over an isolation communication channel coupling a transmitter and receiver of the isolated gate driver.

Abstract: Systems and apparatuses for wireless power transfer system are described. A receiver may send an amplitude shift key (ASK) signal to a transmitter. The transmitter may receive the ASK signal from the receiver. The transmitter may perform a demodulation on the ASK signal. The transmitter may, in response to a failure to demodulate the ASK signal, encode a notification of failure in a frequency shift key (FSK) signal. The transmitter may transmit the FSK signal to the receiver. The receiver may receive the FSK signal. The receiver may perform a function to resolve the failure to demodulate the ASK signal.

Abstract: The present disclosure relates to beam configuration methods and apparatus. One example method includes receiving, by a terminal, beam configuration information from a network device, where the beam configuration information is used to instruct the terminal to transmit a signal by using a first beam, and transmitting, by the terminal, the signal by using at least the first beam when a first preset duration starting from a first time point expires, where the first time point is a time point at which the terminal sends an acknowledgement (ACK) message for the beam configuration information to the network device.

Abstract: A system operative to replicate an exact frequency match among multiple signals associated with spatial multiplexing. The system includes twisted pairs and a converter configured to receive multiple input signals, in which each of the input signals is an orthogonal frequency division multiplexing signal comprising multiple sub-carriers, and in which input signals are associated respectively with multiple streams generated in conjunction with spatial multiplexing. The converter utilizes a reference signal, associated with an original conversion signal(s) used outside the converter to establish respective frequency ranges associated with the input signals, to reproduce the original conversion signal(s) as respective replica conversion signal(s).