A signal receiver includes a first preliminary receiver circuit suitable for receiving an input signal and generating a first preliminary reception signal based on a first reference voltage, a second preliminary receiver circuit suitable for receiving the input signal and generating a second preliminary reception signal based on a second reference voltage, a reception circuit suitable for selecting one of the first preliminary reception signal and the second preliminary reception signal in response to a voltage level of a reception signal and generating the reception signal using the selected signal, and a reference voltage generation circuit suitable for adjusting a voltage level of the first reference voltage based on a first offset and adjusting a voltage level of the second reference voltage based on a second offset.

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 method comprising: obtaining a first radio signal and a second radio signal, determining a first envelope signal based on the first radio signal and a second envelope signal based on the second radio signal, determining a preview envelope signal based on the first envelope signal and the second envelope signal, determining a common clipping gain signal based on the preview envelope signal, determining a first clipping gain signal based on the common clipping gain signal and a first weighing factor, determining a second clipping gain signal based on the common clipping gain signal and a second weighing factor, performing a first crest factor reduction for the first radio signal utilizing the first clipping gain signal, and performing a second crest factor reduction for the second radio signal utilizing the second clipping gain signal.

A communication device according to an embodiment includes an oscillator, a first signal generation circuit, a first insulation element, a first receiving circuit, and a first output circuit. The oscillator is configured to output a first carrier signal when at least one of a plurality of input signals that are externally input is at a first logic level. The first carrier signal and a first input signal among the input signals are input to the first signal generation circuit. The first signal generation circuit is configured to generate a first signal when the first input signal changes from a second logic level to the first logic level, output a first modulated signal based on the first signal, and thereafter output a second modulated signal based on the first carrier signal.

A method for mitigating interference at a receiver may include receiving a communication signal at a first Circular Polarization (CP) antenna as a first received signal, receiving the communication signal at a second CP antenna as a second received signal, phase shifting the second received signal that was received by the second CP antenna to produce a phase shifted signal, and mixing the first received signal that was received by the first CP antenna and the phase shifted signal to produce a resulting received CP signal. Related systems, devices and computer program products are also described.

In some embodiments, a method for mitigating interference in a channel having multiple users can include: determining a starting angle based on a direction of a signal of interest (SOI); iteratively steering a beam away from the starting angle in opposite directions and calculating a grade of the beam; choosing the beam at a current angle as a receive beam based on the beam grade; receiving a signal using the receive beam; and decoding the SOI from one or more interfering signals using successive interference cancellation multi-user detection (SIC MUD) on the received signal.

A radio frequency transmission system and methods for mitigating multipath radio frequency interference are disclosed. Embodiments include a first helical antenna having a first radius and operable to receive a first electromagnetic signal, and a second helical antenna having a second radius and operable to receive a second electromagnetic signal. Further embodiments include a phase adjuster configured to receive the first electromagnetic signal as an input signal, apply an adjustable phase delay to the input signal, and output an adjusted electromagnetic signal. Still further embodiments include a signal combiner configured to receive the adjusted electromagnetic signal and the second electromagnetic signal and output a combined electromagnetic signal.

A system and rack includes an antenna subsystem having a preexisting processing pipeline that receives radio frequency returns and an upgraded signal processing pipeline that performs detection processing for the antenna subsystem. The upgraded signal processing pipeline couples to the preexisting processing pipeline. The upgraded signal processing pipeline includes sampling converters to sample the radio frequency returns of the antenna subsystem, field-programmable gate array devices to generate detection data of the radio frequency returns at full-bandwidth and full-range of the antenna subsystem, graphics processing units to apply algorithms to the detection data of the radio frequency returns, and a signal processor configured to perform operations on the sampled radio frequency returns. The operations can include sampling returns, down-converting sampled detections, filtering detections, digitizing radio frequency returns, and applying algorithms to generate output data. The output data can be provided to the preexisting processing pipeline of the antenna subsystem.

A simultaneous transmit and receive (STAR) system comprises a plurality of radiating elements and a plurality of antenna transmit/receive (T/R) elements. The plurality of antenna T/R elements are each in operable communication with a respective radiating element. Each T/R element comprises a transmit channel, a receive channel, a switch, and a directional coupler. The directional coupler comprises an RF input in operable communication with an antenna array receiving signals, an RF output coupling the received signals to an input of the receive channel, and a coupled input operably coupled to the switch. If the switch is set to a predetermined state, the respective transmit channel couples an active cancellation signal to the coupled input of the directional coupler to cancel at least some coupling effects arising on an input to the receive channel, arising from operation of at least some of the T/R elements in the array.

The present subject matter relates to an apparatus for a communication system. The communication system comprises transmitters being configured to operate in multiple transmission frequency bands. The apparatus comprises means being configured for: capturing a set of over-the-air signals at distinct frequency bands of the multiple transmission frequency bands; aligning in time the set of signals using delays between the set of signals and a received signal at a selected receiver of the communication system; combining the set of aligned signals to generate a composite signal; and estimating an interference signal that is caused by the set of signals at the selected receiver by weighting the composite signal using a set of one or more calibrated parameters for the estimation.