Embodiments of the inventive concepts disclosed herein are directed to a system for cancelling interference. The system may include a first antenna and a second antenna spatially separated from the first antenna. The system may include a first time delay unit, coupled to the first antenna, and configured to apply a first time delay and first power gain on a first signal received by the first antenna. The system may include a control circuit, coupled to the first time delay unit, and configured to determine the first time delay and first power gain to cause a modified version of the first signal and a second signal, received by the second antenna, to be aligned in time and power levels.

In one implementation, a wireless communication terminal includes a primary antenna array and a first controller configured to steer a main beam of the primary antenna array in a desired direction. The wireless communication terminal also includes an auxiliary antenna array and a second controller configured to control complex weights to be applied by at least some antenna elements of the auxiliary antenna array to corresponding variants of a second signal received by the at least some auxiliary antenna elements. Furthermore, the wireless communication terminal includes at least one signal combiner configured to combine variants of the second signal received from auxiliary antenna elements into an interfering signal that models interference from a co-located wireless communication terminal and subtract the interfering signal from variants of the first signal received from antenna elements of the principal antenna array to produce an interference mitigated signal.

A mixer termination circuit for a downconverter mixer includes a diplexer circuit coupled to an output of the downconverter mixer. The diplexer circuit is configured to separately terminate a sum component present in an output signal of the downconverter mixer and a difference component present in the output signal of the downconverter mixer.

A receiver can include a first set of one or more amplifier stages configured to amplify input signals in a plurality of communication bands. The receiver can further include a second and third set of one or more amplifier stages. The second set of one or more amplifier stages can be configured to selectively receive the input signals in the plurality of communication bands amplified by the first set of one or more amplifier stages and to amplify one or more input signals in a first one of the plurality of communication bands. Alternatively, the third set of one or more amplifier stages can be configured to selectively receive the input signals in the plurality of communication bands amplified by the first set of one or more amplifier stages and to amplify one or more input signals in a second one of the plurality of communication bands. A first set of one or more mixers can be configured to receive the input signals in the first communication band amplified by the second set of one or more amplifier stages, to receive one or more local oscillator signals for the first communication band, and to generate a baseband signal from a frequency difference of the signal of the first communication band and the one or more local oscillator signals for the first communication band. A second set of one or more mixers can be configured to receive the input signal in the second communication band amplified by the third set of one or more amplifier stages, to receive one or more local oscillator signals for the second communication band, and to generate a baseband signal of the second communication band.

A method of enhancing wireless communication performance includes receiving information indicative of a local interferer where the local interferer is identified based on dynamic position information indicative of a position of at least one mobile communication node, performing noise cancellation relative to a received signal by removing an interference signal associated with the local interferer to generate a scrubbed signal, and providing the scrubbed signal for additional signal processing.

A device may receive a reference signal identifying a radio signal provided to a radio unit associated with a user equipment located substantially near an earth station and identifying a user equipment signal generated by the user equipment. The device may receive an earth station target signal generated by the earth station and a parasitic signal. The device may generate a noise cancellation signal based on the reference signal, the earth station target signal, and the parasitic signal. The device may cause the noise cancellation signal to be applied by the earth station to eliminate the parasitic signal.

The present invention discloses a radio frequency receiver and a receiving method, where the method includes: performing band splitting on a radio frequency signal of multiple carriers to obtain at least one band signal, and outputting the signal; separately performing filtering and amplification processing on the at least one band signal to obtain at least one processed signal; generating multiple oscillation signals; and selectively receiving a processed signal, of the at least one processed signal, that includes a target carrier; receiving an oscillation signal corresponding to the target carrier; selectively selecting a frequency division ratio from multiple frequency division ratios; using the frequency division ratio to perform frequency division on the received oscillation signal to obtain a local oscillator signal; using the local oscillator signal to perform frequency mixing on the received processed signal that includes the target carrier to obtain a mixed signal.

The invention relates to a filter circuit which, on the hardware level, prevents charge transfers caused by one or more currents in a frequency divider (200) from generating an interference signal that can cause a signal distortion at the output of a current-to-voltage converter (300) belonging to a filter circuit. This signal distortion would otherwise have to be removed by means of laborious post-processing of the signal. In this process, the voltage curve at the input of the frequency divider (200) or the current at the second output of the frequency divider (200) are employed so that, by means of a compensation circuit arrangement, it is possible to model a compensation signal that essentially compensates for an interference signal caused by the charge transfers. The invention also relates to an associated method.

It is provided with: a variable decoupling circuit (10) connected to a first input/output port (1) and a third input/output port (3), which reduces coupling between the first input/output port (1) and the third input/output port (3); and a coupling measurement circuit (20) that measures a coupled amplitude and a coupled phase between a second input/output port and a fourth input/output port from a signal output from the variable decoupling circuit (10) to the second input/output port when a signal is input from the first input/output port (1) and a signal output from the fourth input/output port to the variable decoupling circuit (10) when a signal is input from the fourth input/output port, in which a controller (30) controls the variable decoupling circuit (10) in accordance with the coupled amplitude and the coupled phase measured by the coupling measurement circuit (20) such that a coupled amplitude between the first input/output port (1) and the third input/output port (3) becomes zero.

An aircraft communication system is disclosed. The system includes one or more communication devices, an on-board hub, an amplifier, a data antenna, and a base station. The on-board hub prioritizes the information flow of the one or more communication devices. The communication system includes a controller to detect and mitigate signal oscillations of the amplifier.