Abstract: A method is provided for transmitter authentication including generating a noise vector using a generative adversarial network generator model, wherein a signature of a first transmitter is embedded into a signal output by the first transmitter based at least on the noise vector; and using the signature to identify the first transmitter.

Abstract: A radio frequency identification (RFID) system. An RFID tag may include multiple antennas connected with associated circuitry. An RFID tag's multiple antennas and associated circuitry are connected in parallel, and output power of the multiple associated circuitry can be combined. Each of the multiple antennas can be tuned for a different operating property or region. An RFID reader can include multiple antennas connected with associated circuitry. RFID reader's multiple antenna interfaces connect with a baseband processor, which can integrate resources of the reader's multiple antennas and associated circuitry. RFID tag and/or reader can be configured to support wireless channel diversity in enhancing at least one of power delivery and communication link budget.

Abstract: A radio frequency identification (RFID) system may include a plurality of RFID readers and RFID tags. A RFID reader may include an antenna configured to operate at a first frequency and transmit a first beam of a first beam width to the plurality of RFID tags. The RFID antenna may further include an antenna array including a plurality of antennas configured to operate at a second frequency. The antenna array may be configured to transmit a second beam of a second beam width to the plurality of RFID tags. The RFID reader may receive backscatter signals and tag data from the plurality of RFID tags. The RFID reader may locate the plurality of RFID tags based on the backscatter signals and a direction of the second beam. The RFID reader may generate a 3D map of the tag data based on the locations of the plurality of RFID tags.

Abstract: An oscillator includes a first output node and a second output node. There is a tank circuit coupled between the first output node and the second output node. There is a first transistor having a first node, a second node coupled to a current source, and a control node coupled to the second output node. There is a second transistor having a first node, a second node coupled to the current source, and a control node coupled to the first output node. There is a first inductor coupled in series between the first node of the first transistor and the first output node. There is a second inductor coupled in series between the first node of the second transistor and the second output node.

Abstract: Variable gain amplifiers and methods of designing the same include a first amplifying transistor configured to receive a first input signal and to provide a first amplified output signal based on the first input signal. A phase compensating resistor is connected to the first amplifying transistor and has a resistance calibrated as: R e = ? b C be , par where ?b is the base transit time of the first amplifying transistor and Cbe,par is the gain-independent part of the base-emitter capacitance of the first amplifying transistor.

Abstract: A capacitance of a digitally controlled circuit coupled to a first multiplexer (MUX) having a first switch coupled between a first input and a first output, a first pullup device coupled between VDD and the first output, and a first pulldown device coupled between the first output and VSS is controlled. For falling slope of the first output, in a first phase, which is before the falling slope of the first output, turning ON the first switch, and turning OFF the first pullup device. In a second phase, which is during the falling slope of the first output, the first input is coupled to an output of a digital to analog converter coupled to the MUX. In a third phase, which is after the falling slope of the first output, the first switch is turned OFF and the first pulldown device is turned ON.

Abstract: A capacitance of a digitally controlled circuit coupled to a first multiplexer (MUX) having a first switch coupled between a first input and a first output, a first pullup device coupled between VDD and the first output, and a first pulldown device coupled between the first output and VSS is controlled. For falling slope of the first output, in a first phase, which is before the falling slope of the first output, turning ON the first switch, and turning OFF the first pullup device. In a second phase, which is during the falling slope of the first output, the first input is coupled to an output of a digital to analog converter coupled to the MUX. In a third phase, which is after the falling slope of the first output, the first switch is turned OFF and the first pulldown device is turned ON.

Abstract: A voltage controlled oscillator (VCO), a method of designing a voltage controlled oscillator, and a design structure comprising a semiconductor substrate including a voltage controlled oscillator are disclosed. In one embodiment, the VCO comprises an LC tank circuit for generating an oscillator output at an oscillator frequency, and an oscillator core including cross-coupled semiconductor devices to provide feedback to the tank circuit. The VCO further comprises a supply node, a tail node, and a noise by-pass circuit connected to the supply and tail nodes, in parallel with the tank circuit and the oscillator core. The by-pass circuit forms a low-impedance path at a frequency approximately twice the oscillator frequency to at least partially immunize the oscillator core from external noise and to reduce noise contribution from the cross-coupled semiconductor devices.

Abstract: A GAN includes a first device and a second device. A discriminator model in the first device is trained to discriminate samples from a transmitter in the first device from samples from other transmitters, by collaborating by the first device with the second device to train the discriminator model to discriminate between samples from its transmitter and spoofed samples received from a generator model in the second device and to train the generator model in the second device to produce more accurate spoofed samples received by the first device during the training. The training results in a trained discriminator model, which is distributed to another device for use by the other device to discriminate samples received by the other device in order to perform authentication of the transmitter in the first device. The other device performs authentication of the transmitter of the first device using the distributed model.

Abstract: Methods and systems for phased array tapering include setting a gain at a phase-invariant variable gain amplifier in each of a set of front-ends of a phased array transceiver, to perform tapering of beam pattern side lobes. Setting the gain includes setting a first gain at a first stage of the phase-invariant variable gain amplifier and setting a second gain at a second stage of the phase-invariant variable gain amplifier. A dependency of a phase shift of the first stage on the gain of the first stage is equal to and opposite a dependency of a phase shift of the second stage on the gain of the second stage.

Abstract: Techniques that facilitate reconfigurable transmission of a radar frequency signal are provided. In one example, a system includes a signal generator and a power modulator. The signal generator provides a radar waveform signal from a set of radar waveform signals. The power modulator divides a local oscillator signal associated with a first frequency and a first amplitude into a first local oscillator signal and a second local oscillator signal. The power modulator also generates a radio frequency signal associated with a second frequency and a second amplitude based on the radar waveform signal, the first local oscillator signal and the second local oscillator signal.

Abstract: An apparatus includes first and second electronically tunable transmission lines configured to transmit or receive a signal pair and provide a selected phase delay difference to the signal pair corresponding to a selected polarization, a first attenuation element connected to the first electronically tunable transmission line and a second attenuation element connected to the second electronically tunable transmission line. The first and second attenuation elements may each be configured to selectively attenuate signals carried on the electronically tunable transmission line to which they are connected according to a selected attenuation setting of a plurality of selectable attenuation settings provided by one or more attenuation control signals and thereby provide a selected attenuation to the signal pair that corresponds to the selected polarization. A corresponding method is also disclosed herein.

Abstract: A voltage controlled oscillator (VCO), a method of designing a voltage controlled oscillator, and a design structure comprising a semiconductor substrate including a voltage controlled oscillator are disclosed. In one embodiment, the VCO comprises an LC tank circuit for generating an oscillator output at an oscillator frequency, and an oscillator core including cross-coupled semiconductor devices to provide feedback to the tank circuit. The VCO further comprises a supply node, a tail node, and a noise by-pass circuit connected to the supply and tail nodes, in parallel with the tank circuit and the oscillator core. The by-pass circuit forms a low-impedance path at a frequency approximately twice the oscillator frequency to at least partially immunize the oscillator core from external noise and to reduce noise contribution from the cross-coupled semiconductor devices.

Abstract: An apparatus includes first and second electronically tunable transmission lines configured to receive a signal pair and provide a selected phase delay difference to the signal pair, a first shunting element connected to the first electronically tunable transmission line and a second shunting element connected to the second electronically tunable transmission line. The first and second shunting elements may each be configured to selectively shunt the electronically tunable transmission line to which they are connected according to one or more shunting control signals. A corresponding method is also disclosed herein.

Abstract: An array of antenna elements are located in relation with a plurality of pre-characterized reference detectors. At baseband frequencies, a transmit radiation pattern of the array of antenna elements is sensed with the plurality of pre-characterized reference detectors, at a plurality of phase and gain settings, to detect mismatch among two or more elements of the array of antenna elements. Phase and gain settings for the array of antenna elements are updated to correct the mismatch.

Abstract: A method is provided for transmitter authentication including generating a noise vector using a generative adversarial network generator model, wherein a signature of a first transmitter is embedded into a signal output by the first transmitter based at least on the noise vector; and using the signature to identify the first transmitter.

Abstract: A voltage controlled oscillator (VCO), a method of designing a voltage controlled oscillator, and a design structure comprising a semiconductor substrate including a voltage controlled oscillator are disclosed. In one embodiment, the VCO comprises an LC tank circuit for generating an oscillator output at an oscillator frequency, and an oscillator core including cross-coupled semiconductor devices to provide feedback to the tank circuit. The VCO further comprises a supply node, a tail node, and a noise by-pass circuit connected to the supply and tail nodes, in parallel with the tank circuit and the oscillator core. The by-pass circuit forms a low-impedance path at a frequency approximately twice the oscillator frequency to at least partially immunize the oscillator core from external noise and to reduce noise contribution from the cross-coupled semiconductor devices.

Abstract: Techniques that facilitate reconfigurable transmission of a radar frequency signal are provided. In one example, a system includes a signal generator and a power modulator. The signal generator provides a radar waveform signal from a set of radar waveform signals. The power modulator divides a local oscillator signal associated with a first frequency and a first amplitude into a first local oscillator signal and a second local oscillator signal. The power modulator also generates a radio frequency signal associated with a second frequency and a second amplitude based on the radar waveform signal, the first local oscillator signal and the second local oscillator signal.

Abstract: A portable computing system includes a portable computing device consisting essentially of a logical processor, a memory in communication with the logical processor with operating system software, a high speed, secure wireless communication module in communication with the logical processor, an integrated power source suitable to provide all power needs of the portable computing device and an integrated electric power generation mechanism in communication with the integrated power source to recharge the integrated power source. In addition a visual display is provided that has a power supply separate from the integrated power source of the portable computing device and a complementary wireless communication module, the portable visual display in communication with the high speed, secure wireless communication module through the complementary wireless communication module. The portable computing device and the visual display do not share a physical connection.

Abstract: A method and system of a configurable phased array transceiver are provided. A first beamforming unit is configured to provide a first beam. A second beamforming unit is configured to provide a second beam. A first bi-directional power controller is configured to combine or to split the first beam and the second beam. Each beamforming unit comprises a plurality of radio frequency (RF) front-ends, each front-end being configured to transmit and receive RF signals. Each beam is independently configurable to operate in a transmit (TX) or a receive (RX) mode.