Various embodiments of the system and method relate to improvements in co-channel interference mitigation in shared spectrum environments operating under the aegis of a Spectrum Access System and companion database. Implementation orchestrates, detects, and obtains noise measurements from a potentially-affected receiver utilizing programmed reduction of transmitted power from a potential interferer when the two entities connect over the Internet or other communication network. Receivers and transmitters may use the method with the same or different Physical Layers (PHYs) and protocols. In one embodiment, a momentary reduction of transmitter power is noted during which putative interference is measured at the receiver. In another embodiment, an isolated burst is sent from a not-yet commissioned transmitter to contemporaneously detect possible interference at an operating receiver. A third embodiment can be used to measure and mitigate interference from a stationary mobile transmitter. A fourth embodiment establishes hosting for potential interference recognition as a service.

Described is an apparatus which comprises: a pre-driver coupled to a transmitter, the transmitter having a differential output; and a tuning circuit operable to couple to the differential output to tune the pre-driver of the transmitter according to a common mode noise signature of a common mode signal derived from the differential output.

Embodiments of the present invention provide an apparatus and a method for determining a transmission direction of a secondary carrier. A reference carrier of a first secondary carrier is obtained according to network configuration information, and a transmission direction of a subframe on the first secondary carrier is determined according to a transmission direction of a subframe on the reference carrier, so that data transmission directions of the reference carrier and the first secondary carrier are the same at a same moment. A transmission direction of data of the subframes on the first secondary carrier transmitted in a frequency band adjacent to a frequency band of the reference carrier is determined by using the reference carrier, thereby avoiding interference occurring when the adjacent frequency bands simultaneously transmit data of different directions.

A testing method for testing mobile communication devices comprises measuring a three-dimensional antenna pattern of an active phased antenna array (AAS) of the mobile communication device, with the AAS being maintained at a specific beamforming alignment during the measurement. A predefined base fading profile is calibrated with the measured three-dimensional antenna pattern to obtain an optimized fading profile adapted to the specific beamforming alignment. A channel model for emulation of a base station is emulated on the basis of the optimized fading profile. The method further involves performing a receiver test on the mobile communication device using the emulated channel model. The testing method may in some embodiments be a radiated two-stage over-the-air (RTS-OTA) testing method.

A testing method for testing mobile communication devices comprises measuring a three-dimensional antenna pattern of an active phased antenna array (AAS) of the mobile communication device, with the AAS being maintained at a specific beamforming alignment during the measurement. A predefined base fading profile is calibrated with the measured three-dimensional antenna pattern to obtain an optimized fading profile adapted to the specific beamforming alignment. A channel model for emulation of a base station is emulated on the basis of the optimized fading profile. The method further involves performing a receiver test on the mobile communication device using the emulated channel model. The testing method may in some embodiments be a radiated two-stage over-the-air (RTS-OTA) testing method.

Systems and methods for full-duplex communication in a communications network, including generating a combined channel matrix including two or more channel matrices and determining a null space and a basis for the combined channel matrix. Common, individual, and disjoint vector spaces are determined, and common vector space is determined for each of one or more receiving nodes and each or one or more transmitting nodes, disjoint vector spaces for each of the one or more nodes are determined based on the common vector space for each of the one or more nodes, and individual vector spaces are determined based on the common and the disjoint vector spaces. Signals are mapped at each of the nodes to determine corresponding vector spaces; and interference alignment is performed in common vector spaces and zero forcing in disjoint vector spaces using a hardware processor.

Various embodiments of the system and method relate to improvements in co-channel interference mitigation in shared spectrum environments operating under the aegis of a Spectrum Access System and companion database. Implementation orchestrates, detects, and obtains noise measurements from a potentially-affected receiver utilizing programmed reduction of transmitted power from a potential interferer when the two entities connect over the Internet or other communication network. Receivers and transmitters may use the method with the same or different Physical Layers (PHYs) and protocols. In one embodiment, a momentary reduction of transmitter power is noted during which putative interference is measured at the receiver. In another embodiment, an isolated burst is sent from a not-yet commissioned transmitter to contemporaneously detect possible interference at an operating receiver. A third embodiment can be used to measure and mitigate interference from a stationary mobile transmitter. A fourth embodiment establishes hosting for potential interference recognition as a service.

A transceiver circuit includes a signal generator arranged to generate an output signal; a transmitter coupled to the signal generator so as to transmit the output signal; a receiver arranged to receive a received signal; a mixer coupled to the receiver and to the signal generator so as to mix the output signal and the received signal so as to produce a mixed signal; and at least one filter coupled to the mixer so as to act upon the mixed signal to produce a filtered signal. The filtered signal includes an unwanted portion of the output signal is received at the receiver without having been reflected from a target. The transceiver circuit further includes a correction circuit arranged to generate a simulated waveform that simulates the behavior of the each filter to the unwanted portion of the output signal and applies a correction so as to remove the simulated waveform from the filtered signal.

Various embodiments of the system and method relate to improvements in co-channel interference mitigation in shared spectrum environments operating under the aegis of a Spectrum Access System and companion database. Implementation orchestrates, detects, and obtains noise measurements from a potentially-affected receiver utilizing programmed reduction of transmitted power from a potential interferer when the two entities connect over the Internet or other communication network. Receivers and transmitters may use the method with the same or different Physical Layers (PHYs) and protocols. In one embodiment, a momentary reduction of transmitter power is noted during which putative interference is measured at the receiver. In another embodiment, an isolated burst is sent from a not-yet commissioned transmitter to contemporaneously detect possible interference at an operating receiver. A third embodiment can be used to measure and mitigate interference from a stationary mobile transmitter. A fourth embodiment establishes hosting for potential interference recognition as a service.

A bus system for configuring communication interfaces in a vehicle has at least two different bus lines which are each electrically coupled to one and the same first voltage-limiting element to limit the voltage level of a voltage pulse occurring with a predefined reference potential as a positive voltage pulse between one of the two bus lines and a first point. In addition, the two bus lines are each electrically coupled to one and the same second voltage-limiting element to limit the voltage level of a voltage pulse occurring with a predefined reference potential as a negative voltage pulse between one of the two bus lines and a second point, to a second voltage limit.