Abstract: A method performed by a base station of enabling a User Equipment (UE) to determine a precoder codebook in a wireless communication system is provided. The base station transmits, to the UE, information regarding precoder parameters enabling the UE to determine the precoder codebook. The precoder parameters are associated with a plurality of antenna ports of the base station. The precoder parameters relate to a first dimension and a second dimension of the precoder codebook. The plurality of antenna ports comprises a number of antenna ports that is a function of a number of antenna ports in the first dimension, and a number of antenna ports in the second dimension.

Abstract: A system comprising a processing circuitry configured to: obtain a first ordered sequence of symbols associated with a corresponding second ordered sequence of transmitted symbols and including one or more errors, the errors being discrepancies between given symbols of the first ordered sequence and corresponding symbols of the second ordered sequence; determine, for each symbol of the first ordered sequence of symbols, an estimated transmitted symbol, utilizing a Decision Feedback Equalizer (DFE); and determine if the estimated transmitted symbol of a given symbol of the first ordered sequence of symbols, satisfies a saturation threshold condition; and determine an error hypothesis identifying one or more of the errors by comparing the estimated transmitted symbol of at least one symbol of the first ordered sequence of symbols with one or more pairs of thresholds.

Abstract: Optimized continuous time linear equalization (CTLE) circuit parameters for a received signal are found using an iterative search process. The received signal is repeatedly sampled by an analog-to-digital converter (ADC). Certain samples containing interference that cannot be cancelled by a CTLE in the sampled series are filtered out (discarded). The remaining samples are used to generate, over a selected evaluation window, a histogram of the sampled values. This histogram is used to calculate a figure of merit for the current CTLE parameter settings. The figures of merit for various CTLE parameter settings are compared to find the set of CTLE parameter settings that optimize the figure of merit and by extension, optimize the CTLE circuitry's performance at equalizing the received signal.

Abstract: A front-end circuit includes an antenna connection terminal, a selection terminal, and a selection terminal, a switching circuit including a common terminal and selection terminals, a receive filter configured to pass a radio-frequency signal in Band B, a signal path connecting the selection terminal and the selection terminal and including the receive filter, a signal path connecting the selection terminal and the selection terminal and defining and functioning as a bypass path without any filter, and a filter coupled between the antenna connection terminal and the common terminal and configured to pass a first frequency range group including Band B.

Abstract: In a transmission device connected by AC coupling, time taken before the start of transmission of valid data is shortened. The transmission device includes an internal resistor, an internal circuit, and a transmission-side control unit. One end of the internal resistor is connected to an output terminal connected to a capacitor. The internal circuit supplies one of a plurality of potentials different from each other to another end of the internal resistor. The transmission-side control unit performs control to supply one of the plurality of potentials to the internal circuit over a period from time when a potential of the output terminal is initialized to a predetermined initial value to timing when the potential of the output terminal reaches a predetermined specified value.

Abstract: A communication system has a galvanic isolation link coupling a first circuit to a second circuit. The first circuit transmits first data signals to the second circuit and receives second data signals from the second circuit in response to the first data signals. The data signals are transmitted in consecutive time slots of a determined time duration via the galvanic isolation link. The first data signals include polling signals transmitted from the first circuit to the second circuit during consecutive time slots, and on-demand access requests transmitted from the first circuit to the second circuit. The second data signals include status response signals transmitted from the second circuit to the first circuit in response to polling signals received from the first circuit, and access response signals transmitted from the second circuit to the first circuit in response to access requests received from the first circuit.

Abstract: A receiving device includes a first sampling circuit extracting first binary data from a first signal based on a first edge timing of a first clock signal. The receiving device includes a second sampling circuit extracting second binary data from the first signal based on the first edge timing, and further extracting third binary data from the first signal based on a second edge timing of a second clock signal having a phase delayed from a phase of the first clock signal. The receiving device includes a circuit outputting a second signal indicating a phase shift direction of a third clock signal. The receiving device includes a circuit outputting waveform data based on the first binary data and the second binary data or the third binary data. The second sampling circuit selects either the second binary data or the third binary data based on the second signal.

Abstract: Suppressing interference in a frequency hopping signal. The method includes receiving a frequency hopping signal for a signal of interest. The frequency hopping signal includes the signal of interest modulated using frequency hopping and wideband and narrowband interference. Prior to de-hopping the frequency hopping signal, one or more wideband interferences in the frequency hopping signal are identified. The one or more wideband interferences are suppressed to create a wideband interference suppressed signal. Subsequent to suppressing the one or more wideband interferences, the wideband interference suppressed signal is de-hopped to create a de-hopped signal. In the de-hopped signal, one or more narrowband interferences are identified. The one or more narrowband interferences are suppressed to create an interference suppressed signal. The interference suppressed signal is demodulated to create a demodulated signal.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to cell recovery techniques. One example method generally includes receiving, at a user-equipment (UE), at least one pilot signal via a secondary cell, receive, via a primary cell, a first message triggering reporting of at least one preferred beam for communication via the secondary cell, determining the preferred beam based on the at least one pilot signal, transmitting, via the primary cell, a report indicating the at least one preferred beam, and communicating data via the secondary cell and via the preferred beam.

Abstract: A system for selecting an equalizer setting of an equalizer to equalize signals received via a communications link. Starting with a first (e.g., minimum) equalizer setting and a threshold voltage near the mid-eye voltage of the equalized output signal, the system estimates the amplitude of the inner eye of the equalized output signal by comparing the equalized output signal to a series of threshold voltages. If the amplitude of the equalized output signal is less than ideal, the system dynamically increases the equalizer setting. The system quickly converges on the equalizer setting for the communication link because, rather than comparing the output signal at every voltage offset using every equalizer setting, the system only evaluates the equalizer settings necessary to select the equalizer setting for the communications link and uses only the voltage offsets necessary to evaluate each equalizer setting.

Abstract: A receiver circuit includes an analog front end and a non-linear equalizer. The analog front end including a super source follower (SSF) amplifier having a first input terminal adapted to couple to a transmission line to receive an input signal referenced to a first voltage level, a second input adapted to receive a reference voltage, and first and second output terminals adapted to provide an amplified signal referenced to a second voltage level. The non-linear equalizer coupled to receive an output signal of the analog front end and compensate for inter-symbol interference at a data rate of at least 14 Gbps. The SSF amplifier includes transistors having relative sizes selected to provide a frequency response of the SSF amplifier with a peak at a frequency approximately ? of the data rate.

Abstract: An analog front-end receiver including a termination resistor configured to receive first and second differential signals from different data lines, the second differential signal being differential with respect to the first differential signal, an active equalizer configured to receive a first input differential signal through a first input node and a second input differential signal through a second input node, the first and second input differential signals both having an input common mode voltage, the first and second input differential signals being based on the first and second differential signal, respectively, and output first and output differential signals to first and second output nodes, respectfully, the second output differential signal being differential with respect to the first output differential signal, and an input common mode voltage generator configured to adjust the input common mode voltage to be equal to an output common mode voltage of the first output differential signal.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. A transmitter node and a relay node transmit, to a base station, feedback related to complex channel estimates associated with beam pairs providing viable paths for a first link between the transmitter node and the base station, a second link between the relay node and the base station, and a third link between the transmitter node and the relay node. The transmitter node transmits a signal to the base station using a transmit beam associated with a first beam pair and to the relay node using a transmit beam associated with a second beam pair. The base station receives the signal from the transmitter node and an estimate of the signal from the relay node via a receive beam configured based at least in part on the complex channel estimates included in the feedback. Numerous other aspects are provided.

Abstract: Devices and systems useful in concurrently receiving and transmitting Wi-Fi signals and Bluetooth signals in the same frequency band are provided. By way of example, an electronic device includes a transceiver configured to transmit data and to receive data over channels of a first wireless network and a second wireless network concurrently. The transceiver includes a plurality of filters configured to allow the transceiver to transmit the data and to receive the data in the same frequency band by reducing interference between signals of the first wireless network and the second wireless network.

Abstract: A switching mixer array is disclosed for the mixing of a digital LO signal with an analog input signal. Each switching mixer in the array is configured to assume either a first switching state or second switching state responsive to a respective bit of the digital LO signal.

Abstract: Systems and methods are provided herein that include an improved RF switch assembly. In at least one embodiment, the RF switch assembly may have an optimized topology including a common node shared by each signal path, reducing the size and cost of the RF switch assembly and providing improved performance.

Abstract: Disclosed are some examples of retimer circuitry, systems and methods. In some implementations, clock data recovery circuitry is coupled between a receiver and a transmitter. The clock data recovery circuitry is configured to: extract a data component from an input data signal associated with the receiver, provide the data component to the transmitter, and generate a phase control signal. Phase interpolator circuitry is coupled with the clock data recovery circuitry. The phase interpolator circuitry includes a phase interpolator configured to: receive the phase control signal, generate, based on the phase control signal, an output clock signal, and provide the output clock signal to the transmitter to track data packets of the data component.

Abstract: Some embodiments include apparatus having multiple samplers in a decision feedback equalizer (DFE). The multiple samplers include at least two samplers and are configured to be activated in a first mode of the DFE to receive first input information from a summing circuit. At least one of the samplers is configured to be deactivated in a second mode of the DFE. At least one of the samplers is configured to be activated in the second mode of the DFE to receive second input information from the summing circuit.

Abstract: A bidirectional capacitive isolator includes a capacitive isolation network, a first transceiver circuit, and a second transceiver circuit. The capacitive isolation network includes a first port and a second port. The first transceiver circuit is coupled to the first port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the first transceiver circuit from signal received by the first transceiver circuit. The second transceiver circuit is coupled to the second port of the capacitive isolation network, and includes circuitry configured to cancel signal transmitted by the second transceiver circuit from signal received by the second transceiver circuit.

Abstract: The present disclosure relates to an acoustic position determination system that includes a mobile communication device and at least one base transmitter unit. The mobile communication device is configured to identify a peak in the received signal, and to de-convolve the signal with all codes that are relevant to the area in which the signal is received. A joint likelihood that a potential code is correct is formed by determining a likelihood based on a signal parameter such as signal-to-noise ratio and a likelihood based on time-of arrival information.