Abstract: In one aspect, an apparatus includes: a low noise amplifier (LNA) to receive and amplify a radio frequency (RF) signal; a mixer coupled to the LNA to downconvert the RF signal to a second frequency signal; a quadrature transimpedance amplifier (TIA) to convert a current of the second frequency signal to a voltage signal, the quadrature TIA having an in-phase (I)-channel having an I-channel DC offset and a quadrature-phase (Q)-channel having a Q-channel DC offset; and a DC offset calibration circuit coupled to the quadrature TIA. The DC offset calibration circuit is configured to calibrate a DC offset of the quadrature TIA. The DC offset calibration circuit may be configured to independently determine an I-channel DC offset setting and independently determine a Q-channel DC offset setting, where the I-channel and Q-channels have a DC offset interdependency.

Abstract: In one aspect, an apparatus includes: a low noise amplifier (LNA) to receive and amplify a radio frequency (RF) signal; a mixer coupled to the LNA to downconvert the RF signal to a second frequency signal; a quadrature transimpedance amplifier (TIA) to convert a current of the second frequency signal to a voltage signal, the quadrature TIA having an in-phase (I)-channel having an I-channel DC offset and a quadrature-phase (Q)-channel having a Q-channel DC offset; and a DC offset calibration circuit coupled to the quadrature TIA. The DC offset calibration circuit is configured to calibrate a DC offset of the quadrature TIA. The DC offset calibration circuit may be configured to independently determine an I-channel DC offset setting and independently determine a Q-channel DC offset setting, where the I-channel and Q-channels have a DC offset interdependency.

Abstract: In one aspect, an apparatus comprises: a low noise amplifier (LNA) to receive and amplify a receive radio frequency (RF) signal; a power amplifier (PA) to amplify a transmit RF signal and output the amplified transmit RF signal at an output node of the PA; a blocking capacitor coupled to the output node of the PA; an input/output (I/O) pad coupled to the output node, the I/O pad to interface with an antenna; and a pad attenuator coupled to the output node of the PA, the pad attenuator to attenuate the receive RF signal in a receive mode and minimize a load on the PA in a transmit mode.

Abstract: A communication system and method are provided to conduct waterway searches for the detection and identification of objects and the generation of law enforcement agency alerts and pre-approved external agency notifications. A water body surveillance apparatus, under control of a law enforcement agency, surveys above and below a water surface to detect objects and collect data pertaining to the detected objects. The communication system identifies the detected object and generates an alert to the law enforcement agency identifying the object. A notification is sent to pre-approved external agencies based on object type. The pre-approved external agencies may include other law enforcement agencies different from the law enforcement agency and non-law enforcement agencies, such as pre-approved insurance agencies, and vehicle repossession companies, environmental agencies.

Abstract: A communication system and method are provided to conduct waterway searches for the detection and identification of objects and the generation of law enforcement agency alerts and pre-approved external agency notifications. A water body surveillance apparatus, under control of a law enforcement agency, surveys above and below a water surface to detect objects and collect data pertaining to the detected objects. The communication system identifies the detected object and generates an alert to the law enforcement agency identifying the object. A notification is sent to pre-approved external agencies based on object type. The pre-approved external agencies may include other law enforcement agencies different from the law enforcement agency and non-law enforcement agencies, such as pre-approved insurance agencies, and vehicle repossession companies, environmental agencies.

Abstract: Systems and methods for processing radiofrequency signals using modulation duty cycle scaling. One system includes a first receive path configured to directly sample a first signal in a first frequency range. The system includes a second receive path configured to convert a second signal in a second frequency range. The second receive path includes a receive modulator operating over a duty cycle. The receive modulator is configured to adjust the duty cycle by a predetermined scaling factor.

Abstract: Systems and methods for processing radiofrequency signals using modulation duty cycle scaling. One system includes a first receive path configured to directly sample a first signal in a first frequency range. The system includes a second receive path configured to convert a second signal in a second frequency range. The second receive path includes a receive modulator operating over a duty cycle. The receive modulator is configured to adjust the duty cycle by a predetermined scaling factor.