In some aspects, the disclosure is directed to methods and systems for interference mitigation and cancellation in full duplex amplifiers for cable modem or broadband communication systems. In many implementations, an interference canceller in the downstream path may be provided to equalize composite power on the FDX upstream subbands within a predetermined range of amplitude (e.g. X dB) from the desired downstream signal on the same subband, without affecting the downstream subbands.

A vehicle-to-X communications system for a vehicle, includes first antenna, a second antenna, a first transceiver for transmitting and receiving a signal, the first transceiver electrically connectable to the first antenna via a first antenna interface, a second transceiver for transmitting and receiving a signal, the second transceiver electrically connectable to the second antenna via a second antenna interface, a control device connectable to the first transceiver via a first communications interface and to the second transceiver via a second communications interface. The first transceiver and the second transceiver are configured to communicate with the control device independently of one another and, further, to transmit and receive a signal independently of one another via their first antenna and the second antenna.

A vehicle-to-X communications system for a vehicle, includes first antenna, a second antenna, a first transceiver for transmitting and receiving a signal, the first transceiver electrically connectable to the first antenna via a first antenna interface, a second transceiver for transmitting and receiving a signal, the second transceiver electrically connectable to the second antenna via a second antenna interface, a control device connectable to the first transceiver via a first communications interface and to the second transceiver via a second communications interface. The first transceiver and the second transceiver are configured to communicate with the control device independently of one another and, further, to transmit and receive a signal independently of one another via their first antenna and the second antenna.

Embodiments disclosed herein relate to improving an available bandwidth for a transceiver of an electronic device and to reducing a footprint of an associated integrated circuit of the electronic device. To do so, an isolation circuit is disposed between a transmit circuit and a receive circuit. The isolation circuit has first and second signal paths. A first portion of the signal propagates along the first signal path and a second portion of the signal propagates along the second signal path. A non-reciprocal phase shifter is disposed on the first signal path to shift a phase of the first portion to match a phase of the second portion and improve isolation between the transmit circuit and the receive circuit. The phase-shifted first portion may be combined with the second portion to reduce or substantially eliminate an insertion loss caused by the isolation circuit.

A communication device according to an embodiment includes a first generator, a second generator, a signal sharer, a combiner, a first measurement circuit, a second measurement circuit, a first control circuit, a second control circuit, and a third control circuit. The first and second measurement circuits measure levels of self-jammer signals, respectively. Each of the self-jammer signals is extracted in corresponding one of a first bandwidth and a second bandwidth larger than the first bandwidth from a signal output from the combiner. The first control circuit sets change values of an amplitude and a phase in the second generator during a period of a first time width. The second control circuit sets change values of the amplitude and the phase in the second generator. The third control circuit causes the first control unit to set the change values of the amplitude and the phase in the second generator.

A communication device according to an embodiment includes a first generator, a second generator, a signal sharer, a combiner, a first measurement circuit, a second measurement circuit, a first control circuit, a second control circuit, and a third control circuit. The first and second measurement circuits measure levels of self-jammer signals, respectively. Each of the self-jammer signals is extracted in corresponding one of a first bandwidth and a second bandwidth larger than the first bandwidth from a signal output from the combiner. The first control circuit sets change values of an amplitude and a phase in the second generator during a period of a first time width. The second control circuit sets change values of the amplitude and the phase in the second generator. The third control circuit causes the first control unit to set the change values of the amplitude and the phase in the second generator.

A configuration to enable a wireless device to resolve a conflict between configured transmit beams and configured receive beams in a self-interference measurement configuration. The first wireless device receives, from a second wireless device, a configuration for a self-interference measurement. The first wireless device determines whether a conflict is present between a configured transmit beam and a configured receive beam. The first wireless device resolves the conflict between the configured transmit beam and the configured receive beam. Similarly, a second wireless device configures a configuration for a self-interference measurement for a first wireless device. The second wireless device determines whether a conflict is present between a configured transmit beam and a configured receive beam of the configuration. The second wireless device resolves the conflict between the configured transmit beam and the configured receive beam. The second wireless device transmits, to the first wireless device, the configuration for the self-interference measurement.

A radio-frequency module includes a transmission path which has one end connected to a transmission terminal and on which a transmission signal in Band A is transmitted; a reception path (62) which has one end connected to a reception terminal (120B) and on which a reception signal in Band B is transmitted; a reception path (63) which has one end connected to a reception terminal (120C) and on which a reception signal in Band C is transmitted; a switch (11) having a common terminal (11a) and selection terminals (11b and 11c); and a switch (12) having a common terminal (12a) and selection terminals (12b and 12c).

A differential combiner circuit (200) comprises three ports each has two terminals (1a, 1b, 2a, 2b, 3a, 3b). The differential combiner circuit (200) further comprises a first sub-circuit comprising a first inductor (L1) connected between the first terminals (1a, 2a) of the first and second ports, and a first capacitor (C1) connected between the first terminals (2a, 3a) of the second and third ports; a second sub-circuit comprising a second inductor (L2) connected between the second terminals (1b, 2b) of the first and second ports, and a second capacitor (C2) connected between the second terminals (2b, 3b) of the second and third ports. The differential combiner circuit (200) further comprises a third capacitor (C3) connected between the first and second terminals (1a, 1b) of the first port, a third inductor (L3) connected between the first and second terminals (3a, 3b) of the third port; a first resistor (R1) connected between the first terminal (1a) of the first port and the second terminal (3b) of the third port; and a second resistor (R2) connected between the second terminal (1b) of the first port and the first terminal (3a) of the third port.

A radio frequency (RF) front end for wireless communications, in particular for use in a half duplex (HD) and/or full duplex (FD) transceiver. The RF front end is based on a quadrature balanced power amplifier (QBPA). The RF front end includes an antenna port for outputting a transmit signal to and receiving a receive signal from an antenna, and a receive port for outputting the receive signal to a signal processing section. Further, the QBPA is configured to receive a transmit input signal at a first port, receive a cancellation input signal at a fourth port, and receive the receive signal at a second port coupled to the antenna port.