Abstract: A radar sensor system is provided that includes: multiple sensor units that each includes a radar receiver and a location sensor; and a processor that is configured to use location sensor-based information to determine differences between respective sensor unit nominal locations and respective sensor unit actual locations and to use the determined differences to fuse the radar data received at the radar receivers to produce a wide radar aperture.

Abstract: Direct signal distribution at mm-wave frequencies is provided by using dielectric waveguides for passive coherent distribution. The relevant distribution path lengths at mm-wave frequencies are short enough that accumulated phase error is not a significant problem. Meanwhile, the dielectric waveguides provide low loss and substantial immunity to electrical interference, thereby avoiding the main disadvantages of direct signal distribution in RF systems.

Abstract: A radar data acquisition circuit comprising: a radar receiver to receive radar data representing a radar scene in response to a sequence of extended sampling waveform frames that includes multiple sampling waveform subframes; and a first processor; configured with stored program instructions to generate one or more replacement sampling waveform subframes to include in an extended sampling waveform frame of the sequence based at least in part upon one or more radar parameters of radar data received using the sequence of extended sampling waveform frames.

Abstract: An optical modulator with a wide aperture, high acceptance angle, low required drive voltages and high operating frequency is provided. The modulator relies on the photoelastic effect and makes use of mechanical resonance in order to improve efficiency. The acoustic excitation and optical propagation path are nominally co-aligned, so the required symmetry breaking is provided by having the modulator material be optically and/or mechanically anisotropic. Such a modulator can be used to enable efficient and low-cost per-pixel optical ranging and speed sensing.

Abstract: An apparatus to detect blood clots based on the analysis of the blood's chromatic properties is described. The chromatic property can be determined non-evasively when used in conjunction with ECMO systems. The red, green, and blue chromatic values of a clotting site and a reference site are compared to determine if a clotting event occurred. It was discovered that, at a minimum, only the red chromatic value needs to be tested and measured to determine if a clotting event had occurred. This system can be adopted to monitor clot formation in heart surgery, heart or lung transplants or patients coupled to ECMO requiring an ability to measure the clots to a blood depth of 20 mm. Once clots are detected, the system can introduce anti-coagulants into the blood stream to reduce the clot formation.

Abstract: Methods and apparatus, including computer program products, are provided for synchronization. In some example embodiments, there may be provided a method. The method may receiving, at a processor, cross module information, the cross module information including target profile information obtained from radar returns received at first radar module and transmitted by a second radar module; and determining, at the processor, a frequency correction, a time correction, and/or a phase correction, the determining based at least on the received cross module information. Related systems, methods, and articles of manufacture are also described.

Abstract: A thermoacoustic imaging device is provided having a transmitter configured to provide an electromagnetic transmit signal (e.g. a continuous sinusoidal signal) to an object being imaged. The transmit signal is a modulated continuous-wave signal based on a carrier frequency signal fc modulated at a modulation frequency at or near fm. The detector is further configured to receive an acoustic signal from the object being imaged, and is responsive to acoustic frequencies at or near 2fm. A non-linear thermoacoustic effect in the object being imaged generates the acoustic signal from the object being imaged. Spectroscopic maps could be generated and imaged object could be analyzed. The device enhances signal-to-noise ratio of the reconstructed image and reduces the requirement of peak power in thermoacoustic imaging systems. In addition, the generated pressure of the imaged object is separated from microwave leakage and feedthrough in frequency through the nonlinear thermoacoustic effect.

Abstract: A hybrid RF-acoustic relay is provided where some but not all of the incident RF power is rectified to power the relay and, optionally, to provide power for further link features. The remaining fraction of the incident RF power is used to directly drive an acoustic transceiver array in communication with one or more acoustically powered nodes. In this manner, power, control and communication can be efficiently provided to acoustically powered nodes even in situations where an RF link or an acoustic link would perform poorly.

Abstract: A partially coordinated radar system is provided comprising: a radar transmitter; a radar receiver; processing circuitry; a first spatial information indicator; a side channel communication system to send radar waveform configuration information from the transmitter to the receiver; processing circuitry to use the waveform information to configure the radar receiver to receive the waveform signal; determine radar-based spatial information based upon the radar waveform signal; determine a mismatch of clocks or local oscillators of transmitter and receiver; and generating a compensation signal indicating correction information to compensate for the determined at least one mismatch.

Abstract: Systems and methods for labeling radar tracks for machine learning are disclosed. According to some aspects, a machine accesses data from radar unit(s), the data from the radar unit(s) comprising radar tracks, each radar track comprising one or more of the following: Doppler and micro-Doppler measurement(s), range measurement(s), and angle measurement(s). The machine accesses data from computer vision device(s), the data from the computer vision device(s) comprising image(s), the data from the computer vision device(s) being associated with a common geographic region and a common time period with the data from the radar unit(s). The machine labels, using an image recognition module, objects in the image(s). The machine determines, based on the common geographic region and the common time period, that labeled object(s) in the image(s) map to radar track(s). The machine labels the radar track(s) based on labels of the labeled objects.

Abstract: A microfluidics device includes an inlet, a plurality of parallelized microfluidic channels, a splitter and a plurality of detection electrodes. The inlet receives a fluidic sample including biological particles. The parallelized microfluidic channels include interaction zones for analysis of the biological particles. The splitter transmits the fluidic sample into the parallelized microfluidic channels. Detection electrodes can conduct the analysis. Each detection electrode is shared among the parallelized microfluidic channels. The detection electrodes are spatially encoded electrodes arranged on locations of each of the parallelized microfluidic channels.

Abstract: Improved localization of the capsule in acoustic capsule endoscopy is provided by using analysis of the frames of the acoustic images to deduce the relative motion of the capsule from frame to frame. This idea can be supplemented with any combination of: further localization methods; propulsion of the capsule via acoustic radiation reaction; bidirectional communication and system level feedback control; energy harvesting; photoacoustic (or x-ray acoustic) imaging; and adding therapy and/or sensor capabilities to the capsule.

Abstract: Efficient power transmission from an acoustic transmitter to an electrical load on an implanted device is provided using a control system that at least varies the transmitted acoustic frequency. Varying the transmitted frequency can change the electrical impedance of the acoustic transducer in the receiver that receives power from the transmitter. This ability to vary the transducer impedance can be used to optimize power delivery to the load.

Abstract: A wireless powering and communication system is provided that includes a base unit, and an external unit that is separate from the base unit, where the base unit includes a single transducer circuit configured for uplink data communication to the external unit, where the transducer circuit is configured for power recovery from the external unit, a multiplexer circuit, a power recovery and conditioning circuit, a controller circuit, and a communication circuit, where the multiplexer circuit is configured to decouple power and data paths to enable operation with the single transducer circuit, the power recovery and conditioning circuit is configured to recover and optionally store power from power received by the single transducer circuit, the power recovery and conditioning circuit is configured to power the controller circuit and the communication circuit, the controller circuit is configured to control the multiplexer circuit, the communication circuit is configured to provide data to the multiplexer circuit

Abstract: Improved thermoacoustic imaging is provided by ensuring directional uniformity of the microwave excitation provided to the target being imaged. This directional uniformity can be quantified in terms of the eccentricity e of the polarization ellipse of the microwave excitation. We have e?0.87, preferably e?0.71, and more preferably e?0.32. Optical excitation can be provided in addition to the microwave excitation. Excitation can be performed at multiple optical wavelengths and/or microwave frequencies to improve depth uniformity. In addition, the employment of excitation cells with optimized spacing and geometry provides the uniformity in another two degrees of freedom. One potential application is to detect blood vessel in user's finger for biometric authentication.

Abstract: A wireless powering and communication system is provided that includes a base unit, and an external unit that is separate from the base unit, where the base unit includes a single transducer circuit configured for uplink data communication to the external unit, where the transducer circuit is configured for power recovery from the external unit, a multiplexer circuit, a power recovery and conditioning circuit, a controller circuit, and a communication circuit, where the multiplexer circuit is configured to decouple power and data paths to enable operation with the single transducer circuit, the power recovery and conditioning circuit is configured to recover and optionally store power from power received by the single transducer circuit, the power recovery and conditioning circuit is configured to power the controller circuit and the communication circuit, the controller circuit is configured to control the multiplexer circuit, the communication circuit is configured to provide data to the multiplexer circuit

Abstract: Efficient power transmission from an acoustic transmitter to an electrical load on an implanted device is provided using a control system that at least varies the transmitted acoustic frequency. Varying the transmitted frequency can change the electrical impedance of the acoustic transducer in the receiver that receives power from the transmitter. This ability to vary the transducer impedance can be used to optimize power delivery to the load.

Abstract: Aspects of the present disclosure are directed toward apparatuses, systems, and methods that include a base unit and a communication circuit that communicate, while implanted in a patient, signals between the patient and at least one device located external to the patient. The base unit also includes a transducer that communicates ultrasound (US) signals between the base unit and the at least one device located external to the patient, and harvests energy carried by the US signals.

Abstract: An analyte monitoring device is provided that includes a microfluidic channel, where the microfluidic channel is configured for holding a sample under test, an electromagnetic excitation source disposed on a first side of the microfluidic channel, an ultrasonic transducer disposed on a second side of the microfluidic channel, or disposed on the first side of the microfluidic channel, and an appropriately programmed computer, where the electromagnetic excitation source is disposed to induce an thermoacoustic response in the microfluidic channel when holding the sample under test, where the ultrasonic transducer is disposed to receive the thermoacoustic response, where the ultrasonic transducer outputs a voltage to the appropriately programmed computer, where the appropriately programmed computer outputs an analyte value according to the thermoacoustic response.

Abstract: Improved thermoacoustic imaging is provided by ensuring directional uniformity of the microwave excitation provided to the target being imaged. This directional uniformity can be quantified in terms of the eccentricity e of the polarization ellipse of the microwave excitation. We have e?0.87, preferably e?0.71, and more preferably e?0.32. Optical excitation can be provided in addition to the microwave excitation. Excitation can be performed at multiple optical wavelengths and/or microwave frequencies to improve depth uniformity. In addition, the employment of excitation cells with optimized spacing and geometry provides the uniformity in another two degrees of freedom. One potential application is to detect blood vessel in user's finger for biometric authentication.