Abstract: A base station configured to perform a method for self-interference cancelation (SIC) is provided. The method includes transmitting, by a transceiver configured to transmit an uplink channel and a downlink channel concurrently, one or more signals, the transceiver coupled to, or including, a first number of transmit antennas and a second number of receive antennas. The method also includes, for at least one receive antenna of the second number of receive antennas, applying a forward path model including a non-linear component corresponding to a transmit path in the transceiver, and applying an equalizer function to a first signal to be transmitted by at least one transmit antenna of the first number of transmit antennas determine a self-interference (SI) estimate; and subtracting, in SIC circuitry, the SI estimate from the signal received via at least one receive antenna of the second number of receive antennas to obtain an residual signal.

Abstract: An electronic device is provided and includes an antenna; a first duplexer including a first band pass filter (BPF), a second BPF, a first port, a second port, and a third port; a filter; a power amplification circuit including an input port and an output port; a processor; a radio frequency (RF) integrated circuit (RFIC) including an input port and an output port; a first switch including a first terminal and a second terminal; a second switch including a first terminal and a second terminal; and a third switch including a first terminal, wherein the processor is configured to connect the antenna to the first terminal of the first switch, the output port of the power amplification circuit to the first terminal of the second switch, and a second port of the filter to the first terminal of the third switch by controlling the first switch, the second switch, and the third switch, and output a baseband signal to the RFIC in a state in which the antenna is connected to the first terminal of the first switch, the

Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management includes generating an RF observation signal based on observing a cellular transmit signal using a cellular front end system, processing the RF observation signal to generate digital observation data using a cellular transceiver, generating a digital wireless local area network receive signal based on processing an RF wireless local area network receive signal using a wireless local area network transceiver, processing the digital observation data to determine an estimated amount of aggressor spectral regrowth present in the RF wireless local area network receive signal using a spectral regrowth modeling circuit of the wireless local area network transceiver, and compensating the digital baseband wireless local area network receive signal for RF signal leakage based on the estimated amount of aggressor spectral regrowth.

Abstract: An article of headgear to be worn on the head of a user includes a first portion to encompass at least a portion of the head of the user and a visor extending forward from the first portion. The visor includes a laterally extending opening therein to receive a personal communication device including a camera such that a lens of the camera is positioned below the lower surface of the visor.

Abstract: An electronic device may include wireless circuitry with a baseband processor, a transceiver circuit, a front-end module, and an antenna. The front-end module may include amplifier circuitry such as a low noise amplifier for amplifying received radio-frequency signals. The low noise amplifier is operable in a non-carrier-aggregation (NCA) mode and a carrier aggregation (CA) mode. The low noise amplifier may include a first input stage, a second input stage, a complementary degeneration transformer, and an input impedance compensation circuit. During the NCA mode, the first input stage is turned on while the second input stage is turned off, the degeneration transformer is controlled to provide maximum inductance, and the compensation circuit is turned on to provide input matching. During the CA mode, the first and second input stages are turned on, the degeneration transformer is adjusted to provide less inductance, and the compensation circuit is turned off.

Abstract: A wireless communication chip includes an analog front-end circuit and a baseband circuit. The analog front-end circuit includes a first transceiver circuit and a second transceiver circuit, wherein the first transceiver circuit is arranged to transmit or receive signals through a first antenna, and the second transceiver circuit is arranged to transmit or receive signals through a second antenna. The baseband circuit is arranged to control the first transceiver circuit to use a first band or a second band for communication, and/or to control the second transceiver circuit to use the first band or the second band for communication. The baseband circuit controls the first transceiver circuit and the second transceiver circuit so that the analog front-end circuit alternately performs 2T2R in the first band and 2T2R in the second band.

Abstract: A radio frequency front end circuit for a multimode transceiver has a first operating mode transmit input port, a second operating mode transmit input/receive output port, and a hybrid first and second operating mode receive output port. A first switch network has one or more switch elements together selectively connecting the first operating mode transmit input port, the second operating mode transmit input/receive output port, and the hybrid first and second operating mode receive output port to a coexistence filter first port. A second switch network has one or more switch elements that together selectively connect a coexistence filter second port to an antenna port.

Abstract: A receiver includes a switch network, a mixer, and an IQ mismatch (IQMM) estimation circuit. The switch network is adapted to be coupled to an output of a transmitter. The switch network is configured to selectably swap complementary signals of a differential pair. The mixer is coupled to the switch network and is configured to down-convert an output signal of the switch network. The IQ IQMM estimation circuit is coupled to the mixer, and is configured to estimate an IQMM of the transmitter based on an output signal of the mixer.

Abstract: Radio frequency (RF) systems with tunable filters are provided herein. In certain embodiments, an RF system includes a first RF processing circuit configured to process a first frequency band of a first communication standard and a second frequency band of a second communication standard. The first frequency band and the second frequency band are close in frequency and/or partially overlapping in frequency. The first RF processing circuit includes a tunable filter for changing the bandwidth of the first RF processing circuit to enhance the robustness of the first RF processing circuit to blocker or jammer signals of a third frequency band.

Abstract: Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.

Abstract: The embodiments include a stackable computing device that includes an integrated heatsink and antenna structure and a housing structure. The housing structure includes a housing casing that surrounds the integrated heatsink and antenna structure. The integrated heatsink and antenna structure includes a heatsink base and one or more radio frequency (RF) antenna portions. The heatsink base includes a connector port that provides an interface between components of the computing device and other computing or peripheral devices. For example, the heatsink base may include platform that is configured to have circuitry fixedly secured on a first side of the platform with a connector of the circuitry aligned with an aperture of the connector port such that a connection to the circuitry is accepted by circuitry of another computing device.

Abstract: A cross-division duplex (XDD) system includes an apparatus having a transceiver configured to communicate via an uplink channel and a downlink channel concurrently. The apparatus also includes a transmit antenna, a receive antenna, and a processor. The processor is configured to: estimate a non-linear component corresponding to a transmit path in the transceiver; apply an equalizer function to a received signal; and subtract, in a self-interference cancel (SIC) circuitry, the estimated non-linear component from the equalized signal.

Abstract: A wireless transmission system includes a first coupler including a plurality of substrates including a signal line and a ground; and a second coupler that transmits a signal with the first coupler. A first substrate is connected to a second substrate by conductors having widths substantially equal to or less than widths of signal lines.

Abstract: A reconfigurable amplifier includes a first transistor having a gate coupled to an input of the reconfigurable amplifier, and a source coupled to a ground. The reconfigurable amplifier also includes a gate control circuit, and a second transistor having a gate coupled to the gate control circuit, a source coupled to a drain of the first transistor, and a drain coupled to an output of the reconfigurable amplifier, wherein the gate control circuit is configured to output a bias voltage to the gate of the second transistor in a cascode mode, and output a switch voltage to the gate of the second transistor in a non-cascode mode. The reconfigurable amplifier further includes a load coupled to the output of the reconfigurable amplifier.

Abstract: A circuit includes a transformer having a primary coil coupled to a first power amplifier (PA) and a second PA, and a secondary coil. The secondary coil supplies a current to an antenna based on a first direction of a first phase of a first amplified constant-envelope signal in the primary coil with respect to a second phase of a second amplified constant-envelope signal in the primary coil. The circuit further includes load impedance coupled between a median point of the primary coil and ground. The load impedance is adjusted to match one of an impedance of the differential antenna, an impedance of the first PA, and an impedance of the second PA, based on the ripples detected by the ripple detector.

Abstract: An apparatus for reducing switching time of RF FET switching devices is described. A FET switch stack includes a stacked arrangement of FET switches and a plurality of gate feed arrangements, each coupled at a different height of the stacked arrangement. A circuital arrangement with a combination of a series RF FET switch and a shunt RF FET switch, each having a stack of FET switches, is also described. The shunt switch has one or more shunt gate feed arrangements with a number of bypass switches that is less than the number of FET switches in the shunt stack.

Abstract: An integrated radio frequency terminal system includes an integrated modem configured to receive user data and communicate user data to and from a user device. The integrated modem includes a transmit tuner configured to receive the user data and convert the user data from baseband to an intermediate frequency band. The integrated modem includes a receive tuner connected to the baseband modem device and configured to convert received incoming data in the intermediate frequency band to baseband and provide the converted incoming data to the baseband modem device. The system includes a power amplifier connected to the integrated modem and configured to convert the user data from the intermediate frequency band to a radio frequency band. The system includes a low noise amplifier connected to the integrated modem and configured to convert received incoming data from the radio frequency band to the intermediate frequency band.

Abstract: Doherty power amplifiers with coupled line combiners are provided herein. In certain embodiments, a power amplifier system includes a carrier amplifier having a carrier output that provides a first radio frequency signal, a peaking amplifier having a peaking output that provides a second radio frequency signal, and a coupled line combiner including a first conductor line connected to the peaking output, a second conductor line electromagnetically coupled to the first conductor line, a third conductor line connected to the carrier output, and a fourth conductor line electromagnetically coupled to the third conductor line and in series with the second conductor line. The power amplifier system further includes an inductor in series with the fourth conductor line and the second conductor line and operable to provide a radio frequency output signal to an output terminal.

Abstract: Provided is an electronic device that includes a communication processor; a transceiver electrically connected to the communication processor; a first power amplifier electrically connected to the transceiver; a first antenna electrically connected to the first power amplifier; and a first supply adjustor electrically connected to the communication processor and the first power amplifier. The communication processor can be set to perform a first determination about whether a carrier bandwidth part of a first signal transmitted through the first antenna exceeds a first threshold value, perform a second determination about whether the power of the first signal exceeds a second threshold value, select a first tracking mode as an envelope tracking mode or an average power tracking mode on the basis of at least a portion of the first determination and the second determination, and control the first supply adjustor using the selected first tracking mode.

Abstract: One or more processors control processing of radio frequency (RF) signals using a machine-learning network. The one or more processors receive as input, to a radio communications apparatus, a first representation of an RF signal, which is processed using one or more radio stages, providing a second representation of the RF signal. Observations about, and metrics of, the second representation of the RF signal are obtained. Past observations and metrics are accessed from storage. Using the observations, metrics and past observations and metrics, parameters of a machine-learning network, which implements policies to process RF signals, are adjusted by controlling the radio stages. In response to the adjustments, actions performed by one or more controllers of the radio stages are updated. A representation of a subsequent input RF signal is processed using the radio stages that are controlled based on actions including the updated one or more actions.