A pulse signal compensation circuit of a pulse generator can include a pulse measurement circuit and a compensation generator circuit. The pulse measurement circuit can be configured to receive a plurality of pulse signals and to generate an average duty cycle or pulse overlap signal proportional to the duty cycle or pulse overlap of the plurality of pulses. The compensation generator circuit can be configured to receive the average duty cycle or pulse overlap signal and generate a duty cycle or pulse overlap compensation signal based on the average duty cycle or pulse overlap signal. The compensation signal can be utilized to adjust the duty cycle, amount of positive or negative pulse width overlap, and or the like of the plurality of pulse signals.

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 high-frequency front end module includes a primary antenna terminal and a secondary antenna terminal, a first multiplexer and a second multiplexer, a switch circuit, and a first amplifier and a second amplifier. The first multiplexer has a first transmission filter and a first reception filter. The second multiplexer has a second transmission filter and a second reception filter. The switch circuit exclusively switches connection between the primary antenna terminal and the first multiplexer and connection between the primary antenna terminal and the second multiplexer, and exclusively switches connection between the secondary antenna terminal and the first multiplexer and connection between the secondary antenna terminal and the second multiplexer.

An antenna system is described. A main antenna may be configured to receive a first signal, and a first auxiliary antenna may be configured to receive a second signal from a first expected interference direction. An adjustment unit receives the second signal and is configured to adjust the second signal. A combiner unit receives the first signal and the adjusted second signal and is configured to combine the adjusted second signal with the first signal to reduce any contribution of the second signal to the first signal.

An interference sensor device is disclosed. The interference sensor device includes a first conductive plate and a second conductive plate aligned parallel to the first conductive plate. A non-conductive matter is included between the first conductive plate and the second conductive plate. A band pass filter is coupled with the first conductive plate and the second conductive plate. The band pass filter includes a sensor coil. A current transformer having a primary side and a secondary side is included. The primary side is coupled with the band pass filter, and the secondary side is configured to be coupled with a cable. The current transformer having a high capacitive isolation.

Provided is a high frequency communication apparatus and method for vehicle. The high frequency communication apparatus for vehicle includes a communication module configured to process a radio frequency (RF) signal; a cable having one end connected to the communication module; and an antenna module connected to the other end of the cable and configured to transmit through an antenna the RF signal delivered from the communication module, the antenna module including a compensator configured to compensate for a loss of the RF signal in the cable and a controller configured to determine an amount of compensation for the loss in the cable based on power of the RF signal transmitted from the compensator.

A determination apparatus includes circuitry configured to: compare signal separation results obtained by a plurality of signal separation algorithms executed on a mixed signal in which signals emitted from a plurality of signal sources are mixed, each of the plurality of signal separation algorithms being an algorithm separating a signal of interest from the mixed signal; and determine a parameter of each of the plurality of signal separation algorithms based on a comparison result.

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.

A system for mitigating radio frequency interference includes a multiple patch antenna array including a multiplicity of patch antenna elements. The multiple patch antenna array is positioned relative to an interfering antenna such that signals from the interfering antenna cause interference with the multiple patch antenna array. The system also includes an auxiliary antenna positioned relative to the multiple patch antenna array. The system additionally includes a device to generate a spatial null in a direction to the interfering antenna from the multiple patch antenna array in response to a first signal from the auxiliary antenna and a second signal from the multiple patch antenna array. The first signal and the second signal are generated in response to a transmitted signal being received by the auxiliary antenna and the multiple patch antenna array. The spatial null permits simultaneous operation of the multiple patch antenna array and the interfering antenna.

A high-frequency front end module includes a primary antenna and a secondary antenna, a first multiplexer and a second multiplexer, and a switch circuit, in which the first multiplexer has a transmission filter of a band A and a reception filter of the band A, and does not have a transmission filter of a band B, the second multiplexer has a transmission filter of the band B and a reception filter of the band B, and does not have a transmission filter of the band A, and the switch circuit exclusively switches connection between the primary antenna and the first multiplexer and connection between the primary antenna and the second multiplexer, and exclusively switches connection between the secondary antenna and the first multiplexer and connection between the secondary antenna and the second multiplexer.