271 results about "Receiver system" patented technology

The invention provides a GNSS (Global Navigation Satellite System) anti-interference receiver system based on radio frequency front end-INS (Inertial Navigation System) combined assistance, which adopts a dual-core ARM Cortex-A9 and a programmable logic unit for layered decoupling, and realizes real-time receiving and processing of a high-bandwidth data stream, closed-loop control of an interference suppression link and quick response of a navigation path and a strategy decision. All the modules efficiently cooperate through AXI-Lite register mapping, interrupt signals, a shared state buffer area and a timer synchronization mechanism. By controlling bus and state buffer mapping to keep consistency and supporting a module-level independent debugging and system-level soft reset mechanism under hot start, the expandability of subsystem cascade debugging, fault module positioning and online updating is realized. In the aspects of module architecture, data channels and cooperation mechanisms, the structure order, efficient communication and control closed loop are realized, and an embedded multi-module cooperation anti-interference platform which is suitable for a high-interference environment, multi-channel fusion processing and navigation task real-time response is constructed.

An apparatus may include a platen, a light source system, an ultrasonic receiver system and a control system, the light source system being configured for providing first light and second light having first and second wavelengths to a target object on an outer surface of the platen and including one or more light guides configured to convey light parallel to a surface of the platen. The control system may be configured to: cause the light source system to provide the first light and the second light to the target object at a first time and a second time, respectively; receive first and second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light and the second light, respectively; and estimate one or more blood vessel features based on at least one of the first or the second ultrasonic receiver signals.

An apparatus may include a platen, a light source system, an ultrasonic receiver system and a control system, the light source system configured for providing first light of a first wavelength and second light of a second wavelength to a target object on an outer surface of the platen. The control system may be configured to: cause the light source system to provide the first light to the target object at a first time and to provide the second light to the target object at a second time; receive first ultrasonic receiver signals and second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light and the second light, respectively; and estimate one or more blood vessel features based on at least one of the first ultrasonic receiver signals or the second ultrasonic receiver signals.

An apparatus may include a platen, a light source system, an ultrasonic receiver system and a control system, the light source system configured for providing first light of a first wavelength and second light of a second wavelength to a target object along a first axis. The control system may be configured to: cause the light source system to provide the first light to the target object at a first time and to provide the second light to the target object at a second time; receive first ultrasonic receiver signals and second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light and the second light, respectively; and estimate one or more blood vessel features based on at least one of the first ultrasonic receiver signals or the second ultrasonic receiver signals.

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.

Some disclosed methods may involve providing first light of a first wavelength to a target object at a first time, receiving first ultrasonic receiver signals from an ultrasonic receiver system corresponding to photoacoustic responses of the target object to the first light, providing second light of a second wavelength to the target object at a second time, receiving second ultrasonic receiver signals from the ultrasonic receiver system corresponding to photoacoustic responses of the target object to the second light and differentiating a desired signal from one or more background signals based, at least in part, on the first ultrasonic receiver signals and the second ultrasonic receiver signals. The desired signal may correspond to at least a portion of a blood vessel within the target object. A light source system may be configured for providing the first light and the second light to the target object along the same axis.

A sender system 2 is equipped with an optical transmitter 20 that transmits an encoded optical signal 40 at a predetermined strength via a line-of-sight (LOS) communication channel 4, and a key distillator 21 that generates a cryptographic key from a random bit sequence outputted by the optical transmitter 20 through a key distillation processing via an authenticated public communication channel 5. A legitimate receiver system 3 is equipped with an optical receiver 30 that receives the optical signal 40 from the optical transmitter 20 via the LOS communication channel 4, and a key distillator 31 that generates a cryptographic key from the random bit sequence outputted by the optical receiver 30 through the key distillation processing via the authenticated public communication channel 5.

The invention relates to the technical field of power grid communication transmission, and discloses an optical transceiver stability enhancing method and system, and the method comprises the following steps: S1, dividing an optical transceiver system into a plurality of functional regions, configuring at least one optical transceiver node in each region, and connecting the optical transceiver nodes of adjacent regions through redundant links; and S2, according to the real-time load, the bandwidth and the delay parameter of the optical transmitter and receiver, a redundancy switching algorithm is adopted to optimize the redundancy path, and the system further comprises the following modules: a region redundancy module used for dividing the optical transmitter and receiver system into a plurality of regions and connecting the optical transmitter and receiver nodes of the adjacent regions through redundancy links. Through dynamic redundant path switching, advanced electromagnetic shielding and EMI filtering design and an efficient temperature control system, the problems of inflexible redundant path, insufficient electromagnetic interference protection and untimely temperature control response in the existing optical transceiver technology are solved, so that the stability and the anti-interference capability of the system are remarkably improved, and the service life of equipment is remarkably prolonged.

A method for operating a wireless transmission system includes (i) receiving, as input, direct current (DC) power from a power and data connector that comprises a power input and a bi-directional data connector, (ii) generating a driving signal for driving an antenna of the wireless power transmission system, (iii) generating alternating current (AC) wireless signals based on the input DC power and the driving signal, (iv) propagate AC wireless power signals that are based on the AC wireless signals via the antenna, (v) couple with a wireless receiver system via the AC wireless power signals, (vi) receiving data associated with a peripheral device by decoding in-band data signals from the AC wireless power signals that are encoded by the wireless receiver system, and (vii) providing the data associated with the peripheral device to a client device operatively associated with the wireless transmission system, via the bi-directional data connector.

Some embodiments are directed towards a multiple-input multiple-output (MIMO) receiver system for use with N antennas. The receiver system includes: an analog combiner assembly comprising a matrix of vector modulators applying gain and phase shift to each of N signals being received from the respective antenna and combine said N signals into P corresponding signals, P<N; an array of ADC units, each performing quantization of a respective one of said P corresponding signals with a predetermined bit constrain; and a signal recovery system. The signal recovery system can include a digital signal processor performing task-specific recovery of selected K signals, arriving on the antennas in predetermined input directions, from quantized and filtered digital representation of the N signals being received by the analog combiner assembly; and a control unit. The control unit is adapted to utilize optimized operational data to operate the analog combiner and the digital signal processor.

Some embodiments of the invention pertain to generating (s10) and providing (s20) ionospheric disturbance information from navigation satellite system (NSS) reference stations or reference station system to NSS receivers or NSS receiver systems. Station-specific and / or satellite-specific ionospheric disturbance information may be obtained (s40) on the receiver side for mitigation purposes (s60, s70, s80) in the context of estimating parameters useful to determine a position. The ionospheric disturbance information may for example comprise ionospheric amplitude scintillation information, ionospheric phase scintillation information, and / or ionospheric delay gradient information. Systems, vehicles, and computer programs are also disclosed.

A method for operating a wireless power transfer system includes determining a driving signal for transfer of the AC wireless signals, the driving signals based on an operating frequency for the AC wireless signals, a power requirement for the wireless power signals, data contained in the wireless data signals, and one or more thermal mitigation features. Each of the one or more thermal mitigation features are configured to reduce temperature of at least one surface or volume of the wireless transmission system or the wireless receiver system. The method further includes providing the driving signal to an amplifier of the wireless power transmission system and driving a transmitter antenna of the wireless power transmission system, by the amplifier, based on the driving signal.

Some disclosed examples involve controlling a light-steering system to direct light emitted by at least a first light source of a light source system to a first plurality of areas of a target object, wherein controlling the light-steering system involves controlling one or more adjustable micromirrors, one or more adjustable lenses, one or more adjustable diffraction gratings, or combinations thereof. Some examples involve receiving ultrasonic receiver signals from an ultrasonic receiver system corresponding to photoacoustic responses of the target object to light provided the light source system to each area of the first plurality of areas and determining a selected area of the target object from which additional ultrasonic receiver signals will be obtained, wherein determining the selected area involves detecting a blood vessel within the target object. Some examples involve controlling the light source system to obtain additional ultrasonic receiver signals from the selected area.

A quantum-sensing radiofrequency (RF) receiver system includes a multi-channel single-cell detection cell containing rubidium 87 atoms. Each channel is tuned to a respective RF frequency by applying electric potentials to indium-titanium-oxide (ITO) electrodes formed on detection cell walls. The channels are tuned to different RF frequencies to provide a relatively wideband detection in the aggregate across plural channels. A laser system provides plural laser beams, including a respective probe beam, to each channel to excite the 87Ru atoms therealong to a Rydberg state. Each channel can be read out by tracking absorption for each of the plural probe beams of the multi-channel system.

The present invention relates to a lidar system including: laser transmitter and receiver systems, the laser transmitter system including: a wavelength-tunable seed laser which emits pulses at selected wavelength points, and switches between wavelengths within a switching time of <200 ns; a fiber amplifier which amplifies the laser pulses up to 200 kW to a transmitter grating; and a transmitter telescope including primary and secondary mirrors. The laser beam is directed from the transmitter grating to the secondary then primary mirrors, and the first transmitter grating is imaged on the primary mirror to minimize laser beam wander thereon. The transmitter grating diffracts and steers the laser beam by wavelength to a surface, to an arbitrary subset of <2000 resolvable footprints along a cross-track direction at a beam pointing angle switching time of <200 ns, such that footprints illuminated by the laser beam on the surface are imaged in 3D.

A kitchen appliance is disclosed includes a first electrical component, a second electrical component, and a wireless power receiver system. The wireless power receiver system includes a first receiver antenna configured to couple with a first transmission antenna and receive virtual AC power signals from the first transmission antenna. A second receiver antenna is configured to couple with a second transmission antenna and receive virtual DC power signals from the second transmitter antenna. A first receiver power conditioning system is configured to receive the virtual AC power signals, convert the virtual AC power signals to AC received power signals, and provide the AC received power signals to power the first electrical component. The second receiver power conditioning system configured to receive the virtual DC power signals, convert the virtual DC power signals to DC received power signals, and provide the DC received power signals to power the second electrical component.

A dual-mode radar arranged for harmonic and intermodulation operation, said dual-mode radar comprising a transmitter system arranged for detecting an object, said transmitter system comprising a main transmitter arranged for transmitting a first signal towards said object, said first signal having a first frequency, at least one auxiliary transmitter arranged for transmitting a second signal, simultaneously with said first signal, towards said object, said second signal having a second frequency, said second frequency being different, but in a same order of magnitude, to said first frequency, and a receiver system, comprising a receiver arranged for simultaneously receiving a harmonic return signal corresponding to said first signal and receiving an intermodulated return signal corresponding to said first and second signal.

A sensing system includes a sensor, a wireless transmission system, a wireless receiver system, and a controller. The sensor is configured to determine sensor data, the sensor data associated with a sensing environment. The wireless transmission system is configured to wirelessly couple with the sensor, the wireless transmission system configured for wirelessly providing significant electrical energy to the sensor as wireless power signals and receive the sensor data as in-band data signals encoded in the wireless power signals. The wireless receiver system is operatively associated with the sensor and with which the wireless transmission system couples with the sensor and is configured to receive the significant electrical energy as the wireless power signals from the wireless transmission system. The controller is operatively associated with the wireless transmission system and is configured to decode the in-band signals from the wireless power signals as the sensor data.

Some embodiments relate to a communication network comprising at least one receiver system optically coupled to a plurality of transmitter systems for transmission of synchronization signals generated by the at least one receiver system to the plurality of transmitter systems over a unidirectional synchronization channel. The at least one receiver system configured to embed into the synchronization signals thereby generated additional data indicative of an internal time count thereof for synchronization of transmission of data / signals from each one of the plurality of transmitter systems to said at least one receiver system over a sparse data / signals unidirectional communication channel.

Quantum key distribution (QKD) communication techniques where time-bin phase (T-P) encoded photons generated by a QKD transmitter system are converted into hybrid time-bin and polarization encoded photons, transmitted over a communication channel and received by a QKD receiver system, are converted back into T-P encoded photons using an interferometer structure.

Airborne LiDAR bathymetry systems and methods of use are provided. The airborne LiDAR bathymetry system can collect topographic data and bathymetric data at high altitudes. The airborne LiDAR bathymetry system has a receiver system, a detector system, and a laser transmission system.

Disclosed herein are systems and methods for extracting, from an image, a centreline for each of one or more vessels of a vasculature, the system comprising memory, and at least one processor, the memory storing instructions that, when executed by the at least one processor, cause the system to receive, at a receiver system, a first mask of a portion of the vasculature, identify seed points in the image, using a shape analysis model, based on a shape of the vasculature in the first mask, generate, using a centreline tracing model, the centreline for each of the one or more vessels by tracing a traced centreline from each seed point, selecting a candidate centreline from the traced centrelines, based on an anatomical feature of the portion of the vasculature, and filtering the candidate centrelines using one or more geometric shape filters to generate the centreline for each vessel. Finally, a centreline for each vessel is provided as an output.

To provide a quantum key delivery system capable of detecting wiretapping without utilizing a bit error rate, and a quantum key delivery method.SOLUTION: In a quantum key delivery system, a transmitter system comprises a transmission signal generation device for transmitting to a receiver system a transmission signal in which a decoy pulse is inserted at random in a signal pulse of which a phase of each pulse is 0 or π, and a decoy pulse information transmission device for generating a second signal relating to the decoy pulse and transmitting the second signal to the receiver system based on a first signal relating to a time slot on which photon detection is performed. The receiver system comprises a transmission signal detection device for performing the photon detection in response to a phase of the transmission signal, to which a delay time is given, and a simultaneous photon detection rate verification device for verifying a simultaneous photon detection rate in a time slot, in which the signal pulse and the decoy pulse interfere, in response to receiving the second signal.SELECTED DRAWING: Figure 3

The invention discloses a defect coupling low-noise amplifier. The low-noise amplifier solves the problem that the performance of a low-noise amplifier in the prior art is influenced by a grid source inductance coupling coefficient. Forward coupling of an input inductor and a grid inductor and reverse coupling of the input inductor and a source inductor are achieved through a unique defect coupling transformer matching network, meanwhile, reverse coupling of a grid inductor and the source inductor is achieved, and the coupling coefficient of the grid-source inductor is reduced through coupling counteracting inductance; by combining a differential common-source transconductance amplification stage, a four-order magnetic coupling resonance unit, a differential transconductance amplification stage with a neutralizing capacitor and an output transformer matching network, the characteristics of high gain bandwidth and low noise are realized; simulation and actual tests verify that the low-noise amplifier can effectively reduce the noise coefficient and broaden the input matching range, has good compatibility and wide application prospects based on a conventional integrated circuit production process, can be applied to a phased array system, and can also form a receiver system with other circuits.

A wireless initiation device comprises a power source, a processing module, a first housing and an initiation unit. The processing module processes wireless electromagnetic communications signals received by an electromagnetic receiver system associated with the processing module. The wireless electromagnetic communications signals includes a wireless electromagnetic communications signal representative of a FIRE command. The processing module is configured to generate an initiation signal upon receipt of the FIRE command. At least one of the power source and the processing module is disposed in the first housing, and the first housing has a first connector. The initiation unit has a second housing within which is disposed an initiation module that is configured to discharge initiation energy sufficient to initiate an explosive charge associated with the device. The initiation module is connected to, or connectable with, the processing module such that initiation module can receive an initiation signal from the processing module. The initiation unit also has a second connector that is configured to mate with the first connector, thereby connecting the first and second housings. The initiation module is configured to execute a sequence upon receipt of the initiation signal, the sequence resulting in discharge of initiation energy from the initiation unit.

A wireless power transfer system is provided having a wireless transmission system with an input to receive input power from an input power source, a transmission antenna configured to couple with a receiver antenna associated with a wireless receiver system in a peripheral device, and a transmission controller configured to generate AC wireless signals including wireless power signals and wireless data signals. The transmission controller is further configured to derive a coupling factor based on coupling data sent from the wireless receiver system to the wireless transmission system, generate an update frequency based on the derived coupling factor, and transmit the update frequency to the wireless receiver system in the peripheral device, whereby the peripheral device provides coupling data to the wireless transmission system based on the update frequency.

A satellite navigation system comprises a receiver system configured to receive positioning signals from one or more satellites and generate positon, velocity, and calibration data using the positioning signals. The calibration data may include information about multipath positioning signals identified during different measurement periods associated with a reference trajectory. The receiver system generates the positon, velocity, and calibration data for a measurement period based on feedback information generated during a previous measurement period. The feedback information is used to adjust a clock used to generate a local signal.

A method and system is presented for an implantable wireless power receiver for use with a medical stimulation or monitoring device. The receiver receives transmitted energy through one or more non-inductive antenna(s), utilizes microelectronics to perform rectification of the received signal for generation of a DC power supply to power an implantable device, and may also utilize microelectronics to provide parameter settings to the device, or stimulating or other waveforms to a tissue.

A receiver system has at least one antenna that receives a plurality of signals, including a desired signal, across a wide band of frequencies. At least one tunable filter is in signal communication with the at least one antenna, and filters the plurality of signals to produce a plurality of filtered signals. Gain control circuitry is in signal communication with the at least one tunable filter, and produces a gain adjusted version of the filtered signals. A processing unit processes received signals in a portion of the wide band to extract signal characteristics of at least one undesired signal in the portion of the wide band. The at least one tunable filter is tuned based at least in part on the signal characteristics of the at least one undesired signal to maintain the SNR of the desired signal above a threshold level at the output of the gain control circuitry.

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.