A radiofrequency device includes at least the following elements: an antenna, linked to a first transmission channel or reception channel selection device K.sub.1, followed by a front-end stage whose output is linked to a second transmission channel or reception channel selection device K.sub.2, a group of filters connected between the second selection device K.sub.2 and a third transmission channel or reception channel selection device K.sub.3, the third selection device K.sub.3 is connected to a transceiver, the transceiver comprises a converter part, wherein the group of filters comprises N filters having distinct frequency bands B.sub.N in a given bandwidth B.sub.T, the group of filters is linked to a manager selecting at least one of the filters Fj of the group of filters in order to attenuate a first type of disturbing signals P.sub.1, in the vicinity of the centre frequency of the channel to be received, the transceiver comprises a stage comprising a variable filter, the variable filter is configured in order to eliminate a second type of disturbing signals P.sub.2, the stage is connected between the group of filters and the analog-digital and digital-analog conversion set, the number N of filters of the group of filters is chosen by taking into account the operating frequency band value of the antenna, the value of a selected bandwidth Bc and a coefficient δ taking into account overlap effects.

Methods, systems, and devices for wireless communications are described. A first wireless node may transmit, to a control node, an indication of a capability of the first wireless node to perform one or more self-interference cancelation (SIC) procedures between a first antenna array of the first wireless node and a second antenna array of the first wireless node. The first wireless node may receive, from the control node in response to the indication of the capability, a configuration for the first wireless node to use to perform a SIC procedure of the one or more SIC procedures for full-duplex communications. The first wireless node may then communicate, according to the received configuration, with the control node, a control node, or any combination thereof, using the first antenna array and the second antenna array.

A system includes a method for detecting a signal interference in a communication signal of a wireless communication system. An identified source of the signal interference is determined according to an interference profile of a plurality of interference profiles associated with an interference profile library having information that approximates characteristics of the signal interference. The signal interference of the communication signal is mitigated according to an interference parameter associated with the identified source by filtering the communication signal according to the interference parameter.

An interference detection system comprises memory storing computer instructions to cause a processor to perform gathering a temporal snapshot of radio parameter values associated with a first site of a point-to-point radio system, the radio parameter values including at least a receive signal level (RSL) value and at least one other radio parameter value correlated with signal degradation; determining whether the RSL value is greater than an RSL threshold; determining whether the other radio parameter value indicates a threshold level of signal degradation; when the RSL is greater than the RSL threshold and the other parameter indicates a threshold level of signal degradation during the temporal snapshot, determining that external interference is present during the temporal snapshot; when the RSL is not greater than the RSL threshold, determining that the external interference is not present; and performing a responsive action to a determination of the external interference being likely present.

A BAW resonator filter can include a BAW resonator pass-band filter ladder, the BAW resonator pass-band filter ladder can be configured to pass frequency components of an input signal in a pass-band of frequencies received at an input node of the BAW resonator pass-band filter ladder to an output node of the BAW resonator pass-band filter ladder. A first rejection-band series resonator can be coupled in series between an input port of the BAW resonator pass-band filter ladder and the input node, the first rejection-band series resonator can have a first anti-resonant frequency peak in a rejection-band of frequencies that is less than the pass-band of frequencies. A second rejection-band series resonator can be coupled in series between an output port of the BAW resonator filter and the output node, the second rejection-band series resonator can have a second anti-resonant frequency peak in the rejection-band of frequencies.

In certain aspects, a device for wireless transmission includes a transmission path, a feedback path, and a DPD control module. The transmission path includes a digital pre-distortion (DPD) conversion module configured to perform pre-distortion processing on an amplitude and a phase of a transmission signal based on a pre-distortion processing strategy. The transmission path further includes a power amplifier coupled to a downstream of the DPD conversion module and configured to amplify a power of the transmission signal. The feedback path is coupled to the transmission path at the downstream of the power amplifier and configured to generate a feedback signal. The feedback path includes a static gain compensation module configured to be activated during an initial time period of each frame to track and update a static gain for the feedback signal and configured to hold the static gain after the initial time period of each frame. The DPD control module is coupled to the feedback path and the DPD conversion module and configured to adjust the pre-distortion processing strategy based on an amplitude difference and a phase difference between the transmission signal and the feedback signal.

A method for detecting and attenuating the impact of interference in a signal of a radio receiver with multiple tuners. The method includes providing a first input signal RF.sub.1 to a first tuner T.sub.1; simultaneously providing a second input signal RF.sub.2 to a second tuner T.sub.2; simultaneously producing a first intermediate high injection signal IFH.sub.1, by the first tuner T.sub.1, using the first input signal RF.sub.1 filtered on a first frequency f.sub.E, and a first intermediate low injection signal IFB.sub.2, by the second tuner T.sub.2, using the second input signal RF.sub.2 filtered on the first frequency f.sub.E; comparing the first intermediate high injection signal IFH.sub.1 and the first intermediate low injection signal IFB.sub.2; selecting one out of the first intermediate high injection signal IFH.sub.1 and the first intermediate low injection signal IFB.sub.2 to be decoded by the radio receiver.

In some examples, a system includes a transceiver configured to transmit a first surveillance message at a first power level at or below a first maximum power level. The system also includes processing circuitry coupled to the transceiver, the processing circuitry configured to determine that a threshold condition exists. The processing circuitry is also configured to determine a second maximum power level in response to determining that the threshold condition exists, where the second maximum power level is lower than the first maximum power level. The transceiver is configured to transmit, in response to the processing circuitry determining that the threshold condition exists, a second surveillance message at a second power level, wherein the second power level is at or below the second maximum power level.

A transmission apparatus (10) according to the present disclosure incudes: a correction value calculation unit (130) configured to calculate a correction value for correcting an initial standby time of a direct wave signal or an indirect wave signal based on a reception time of the direct wave signal and a reception time of the indirect wave signal that follows the direct wave signal, and a transmission time fluctuation compensation unit (140) configured to calculate the standby time by correcting the initial standby time using the correction value and cause the direct wave signal or the indirect wave signal to stand by in accordance with the standby time. The correction value calculation unit (130) calculates a correction value for increasing the standby time of the direct wave signal or reducing the standby time of the indirect wave signal.

Systems and methods for signal path isolation for neutral-host hardware are provided. In one embodiment, an isolation circuit for a multiple-subchannel wireless communication transceiver comprises: a Tx path coupled to a transmit path output of a multiple-subchannel transceiver; a Rx path coupled to a receive path input of the transceiver; a precancellation circuit comprising: an isolation adjustment circuit within the transmit path of the isolation circuit, the isolation adjustment circuit comprising a phase shifter and a reflection tuner; a directional coupler within the Rx path of the isolation circuit. The isolation adjustment circuit outputs a reflected wave signal comprising a cancellation reference signal to the directional coupler. The cancellation reference signal comprises a complex conjugate of a TX signal leakage signal component of a signal transported in the Rx path of the isolation circuit. Within the directional coupler the cancellation reference signal destructively interferes with TX signal leakage signal component.