99 results about "Signal processing" patented technology

Systems, apparatuses, and methods for processing a received OFDM signal are provided. The system comprises a tuner and a signal processing unit. The tuner is configured to receive an OFDM signal. A signal processing unit is configured to search for a possible frequency of a symbol in the received OFDM signal for a TPS lock and to decide an ambiguous frequency range according to a transmission mode of the TPS lock. The possible frequency is close or equal to a center frequency of the symbol.

A digital transmission system includes at least a client device and a transmission device, and rate-adjusts the client signal transmitted from the client device to the transmission device before accommodating/multiplexing the signal in a frame. The transmission device includes a rate adjusting unit and a frame processing unit. The rate adjusting unit encapsulates the client signal by using a predetermined frame structure, inserts an idle pattern if necessary, and performs rate adjustment into the bit rate which can be contained in the frame. The frame processing unit accommodates/multiplexes the signal after the rate adjustment. The digital transmission system inserts a bit string of the client signal directly in a payload area of the digital frame, or accommodates and multiplexes it. Alternatively, a specific pattern is accommodated in the payload area, or accommodated and multiplexed after performing a reversible digital signal processing.

This invention discloses one triangle wave phase modulation method and device of resonance chamber fiber top, wherein, the laser is connected to first couple device, first phase modulator, second couple device, third couple device, fourth couple device, second phase modulation device and first couple; the first phase modulation and first triangle wave signal generator are connected; the second phase modulation and second triangle signal generator are connected; the second couple device and first photoelectricity, first high speed digital signal processor and laser are connected; the fourth couple device is connected to fourth couple device, second photoelectricity detector, second high speed digital processor; the third couple device is connected to the fiber ring.

The invention discloses a high-light-spectrum full-polarization detection device for interference light field imaging, comprising a prepositioned optical telescoping system, a transverse cutting interference system, a light field imaging system, an area array detector and a signal processing system, which are arranged in sequence, wherein light of a target to be detected sequentially passes through the prepositioned optical telescoping system, the transverse cutting interference system and the light field imaging system to reach to the area array detector; and the signal processing system is used for extracting a two-dimensional space image, high-light-spectrum information and a full-Strokes polarization component of the target to be detected from the area array detector. With the adoption of the detection device, light strength information of a target two-dimensional space, the full-Strokes polarization component of each point of the target, and high-resolution-ratio light spectrum information of each point of the target can be obtained by one time of measurement; and the detection device has a simple structure.

In order to prevent delays in output of detection results, even when a plurality of frequency modulation methods with different frequency change rates are used, an FM-CW radar device employing frequency modulation with two different frequency change rates, has distance/velocity detection unit for detecting the relative distance or relative velocity of a target object based on beat signals of transmission signals with the same frequency change rate and for detecting the relative distance or relative velocity using beat signals when the frequency change rates are different, and distance/velocity confirmation unit for adding evaluation values for relative distances or relative velocities detected in the detection processing, and for confirming the relative distance or relative velocity based on the evaluation value which has reached a criterion value. As a result, more data can be obtained in one detection cycle, and the same advantageous results as when executing a plurality of detection cycles can be obtained. Consequently, delay of output of detection results from the radar device to a vehicle control device can be prevented.

The invention belongs to the field of medical signal processing, particularly provides an eeg high-frequency oscillation signal detecting system based on a convolution neural network, and aims to solve the problem that in a conventional eeg high-frequency oscillation signal detection technique, the false drop rate is high caused by high-frequency noise and peaked wave shape. The eeg high-frequency oscillation signal detecting system comprises a user terminal, a data preprocessing module, a high-frequency oscillation signal predetecting module, the convolution neural network module and a static module, wherein the user terminal is used for acquiring an eeg signal; the data preprocessing module is used for performing data preprocessing; the high-frequency oscillation signal predetecting module is used for performing detection on the eeg signal to obtain suspected high-frequency oscillation fragments; and the convolution neural network module is used for classifying all the suspected high-frequency oscillation fragments. According to the eeg high-frequency oscillation signal detecting system disclosed by the invention, when HFOs are detected, the sensitivity can be effectively improved, the false drop rate is reduced, and the precision rate of epileptogenic focus positioning is increased; and besides, the eeg high-frequency oscillation signal detecting system can use scalp eeg and can also use cortex eeg, so that the egg high-frequency oscillation signal detecting system can enable a doctor to achieve more flexibility.

The invention discloses a method and a device for processing signals based on a broadcast mode automatic dependent surveillance. The method comprises the following steps of obtaining pulse amplitude information, consisting of message amplitude information, by sampling spreading discontinuous oscillation signals; obtaining pulse information and a leading head mark according to the pulse amplitude information; obtaining a reference amplitude value according to the leading head mark, the pulse information and the pulse amplitude information; obtaining a confidence level bit and a data qualification bit of a data bit in the message amplitude information by combining with the leading head mark, the pulse information and the pulse amplitude information according to the reference amplitude value; and correcting message information in the spreading discontinuous oscillation signals according to the obtained confidence level bit and data qualification bit of the data bit in the message amplitude information. The embodiment of the invention can efficiently reduce error data bits in the message information and improve the stability of message signals.

The invention provides an ultrasonic phased array detector with low power consumption and capability of real-timely transforming styles of arrays. The whole system comprises an FPGA (Field Programmable Gate Array) control module, a square MEMS (Micro-electromechanical Systems) ultrasonic sensing array, a PCI (Programmable Communications Interface) bus, a signal processing module and an array style and frequency selection module. The FPGA module comprises a pulse control unit and a beam control unit; the square MEMS ultrasonic sensing array is a square phased array with the same numbers of transverse rows and longitudinal rows which are made up of many MEMS ultrasonic sensors and have the same spacing; the array is formed by arranging a row of emission arrays and a row of receiving arrays in a crossing manner; each emission array element has an independent pulse excitation channel; each receiving array element has an independent echo receiving channel; the signal processing module is composed of amplification units and filter units, which have the same number with that of the receiving array elements; the array style and frequency selection module is composed of key arrays; the key arrays are capable of respectively representing many kinds of different array styles and different ultrasonic frequencies so as to be suitable for different detection conditions, thus a hardware structure of arrays is simplified; therefore, the ultrasonic phased array detector is applicable to detecting various robots under different special environments.

The present invention relates to a flow cytometer, comprising a light source, a light beam shaping module for collimating and converging a light beam emitted from the light source so that the light beam irradiates samples to be detected, a sample generation unit, which comprises a gas-liquid transmission controlling module and a flow chamber that are interconnected, and a signal processing unit, for collecting, photoelectrically converting and analyzing the scattered beam emitted from the flow chamber. The light beam shaping module comprises a first cylindrical lens and a second cylindrical lens for respectively converging the light beams in two directions. In the present invention, the spot converged at the cell-interrogation zone of the flow chamber is flattened to avoid instability of the fluid which in turn leads to instability of the excited optical signal, and consequently the stability and reliability of the system are improved.

The invention discloses a mixed indoor positioning method based on a signal subspace fingerprint database; the method comprises an offline phase and a positioning phase; the offline phase comprises the following steps: using an array antenna to receive signals, obtaining received signal intensity, and building a received signal intensity fingerprint database; calculating received array signals, obtaining signal subspace data, and building a signal subspace fingerprint database. The positioning phase comprises the following steps: matching online obtained data with the fingerprint database, considering offline coordinate probability distribution, using the Bayes theory to fuse information, and finally obtaining the accurate positioning coordinates. The method uses the array antenna technology which represents the future mobile terminal key technology; the fingerprint database built after array signal processing contains incident signal intensity and arrival angle information, thus more effectively confronting channel time varying influences caused by anti-multipath propagation and environment changes, effectively improving indoor positioning accuracy, and reducing positioning errors.

The invention discloses a focused ultrasound-polymeric micelle controllable drug release device and a release method thereof. The device is characterized by consisting of a focused ultrasound system and a drug loaded polymeric micelle system, wherein the focused ultrasound system is connected with a focused ultrasound energy converter (3) by a signal generator (1) through a power amplifier (2); the drug loaded polymeric micelle system consists of a complex micelle (5) formed by amphiphilic block copolymers and drugs and a medium (4); and a drug loaded polymeric micelle is internally provided with a sensor (6) which is connected with a computer (8) through a signal processor (7). The focused ultrasound-polymeric micelle controllable drug release method comprises the step that the drug carried polymeric micelle is prepared through a dialysis method or a solvent evaporation method, and under ultrasonic irradiation, the polymeric micelle responds to ultrasound through a physical or chemical change so as to ensure that loaded hydrophobic drugs are released from the micelle and enter a focal part.

The invention provides an elevator integral frequency converting controller. Besides the motor drive circuits, power supply circuits and brake units, it also contains control circuitry, specifically is: operation control module, curve calculation module, elevator position monitoring module, elevator logical module, clock module, parameter storage module, Canbus module, Mudbugs module, debugging tool module, generator state acquisition module, vector control module, velocity feedback module, elevator and generator parameters processing module, PWM waveform generating module, DPRAM data exchange module and SPI data exchange module, etc. The control circuit processes the ''peripheral'' signal of frequency converting controller, then outputs it to motor drive circuits, thereby integrates most functions of elevator, combines organically the variable-frequency control and the operation control of elevator, it is facilitating for installation and alignment of elevator, and also ensure the operation of elevator under the more efficient, stable and safe condition.

The invention discloses a neutral point direct current online measurement device for a transformer, which comprises a Hall sensor, a copper bar, a transmission fiber, a signal processing module arranged in a box body, a photoelectric power conversion module, a measurement signal photoelectric conversion module and a power laser launching circuit module, wherein the copper bar penetrates through the two sides of the box body; the copper bar in the box body is sleeved with the Hall sensor; the signal processing module is used for receiving an output signal of the Hall sensor, converting the output signal into an optical signal and outputting the optical signal into the measurement signal photoelectric conversion module; the measurement signal photoelectric conversion module is used for converting the inputted optical signal into an electrical signal to output; the photoelectric power conversion module is used for providing power for the Hal sensor and the signal processing module; and the power laser launching circuit module is used for inputting medium power laser for the photoelectric power conversion module. The neutral point direct current online measurement device adopts the optical fiber to supply the energy and transmit the signals, blocks an over-voltage transmission path and improves the measurement stability and the accuracy.

An LCD device having dual source drivers and related driving method are disclosed for performing data signal driving operation by making use of a data writing synchronous control mechanism. The operation of the data writing synchronous control mechanism includes furnishing all image data signals to both the first and second source drivers, latching odd and even image data signals by the first and second source drivers respectively, performing a signal processing process on the odd image data signals for generating a first set of analog data signals by the first source driver, performing a signal processing process on the even image data signals for generating a second set of analog data signals by the second source driver, writing the first set of analog data signals into a plurality of first pixel units, and writing the second set of analog data signals into a plurality of second pixel units.

The invention discloses a CMOS image sensor dual-mode communication receiving system of an integrated photoelectric detector. The system comprises a CMOS image sensor of the integrated photoelectric detector, a 01 picture generation module, a threshold value generation module, a light source detection module, a gray image generation module, a high-speed communication signal processing module and a low-speed communication signal processing module. The CMOS image sensor of the integrated photoelectric detector outputs an image signal, a mark picture is generated through self-feedback by employing the threshold value generation module, the gray image generation module and the 01 picture generation module, a detected light source position is fed back to the CMOS image sensor of the integrated photoelectric detector via the light source detection module, a received communication signal is processed via the high-speed communication signal processing module and the low-speed communication processing module, high-speed communication information and low-speed communication information are outputted, and the reception of dual-mode communication is realized. According to the system disclosed by the invention, the accuracy of light source detection is effectively improved; and the system can be used in visible light communication.

The present invention provides a hearing aid capable of detecting contact vibration noise from a collected sound signal. A hearing aid (100) is provided with two microphones (110-1, 110-2), a vibration component extracting unit (120) which extracts from collected sound signals respectively obtained by the two microphones (110-1, 110-2) an uncorrelated component between two collected sound signals as a vibration component for each frequency band, a vibration noise identifying unit (130) which determines whether or not a contact noise occurs based on the vibration component for each frequency band extracted by the vibration component extracting unit (120), an acoustic signal processing unit (140) which, when generating an acoustic signal by hearing aid processing of the two collected sound signals, processes the acoustic signal depending on the presence or absence of the occurrence of the contact vibration noise, and a receiver (150) which converts the acoustic signal to sound.

The invention discloses a mobile device and an operation method. The mobile device comprises a sound detection unit, a signal processing unit, a sound mixing unit, and a loudspeaker; and the mobile device plays the sound mixing signal through the loudspeaker in a sound mixing mode. The mobile device and the operation method convert environment sound around the mobile device to external sound signals, uses an external sound signal and a music signal to generate a mixing sound frequency signal in the sound mixing mode. As a result, the mobile device can selectively play the sound mixing signal through the loudspeaker and can further improve convenience and safety of the usage of the mobile device.

The invention discloses a circuit and a method for correcting the direct current (DC) offset part in output signals of a signal processing unit. The DC offset correcting circuit comprises a 1 bit quantizer, a control logic unit and a digital-to-analog converter, wherein, the 1 bit quantizer is coupled to the output terminal of the signal processing unit and used for receiving and detecting the DC offset part in the output signals so as to obtain quantitative information. The control logic unit is coupled to the 1 bit quantizer and used for sequentially setting one of a plurality of bits of a compensation value and updating the set bit according to the quantitative information. The digital-to-analog converter is coupled to the control logic unit and used for compensating the DC offset part in the output signals of the signal processing unit according to the compensation value.

A liquid crystal display device is provided which is capable of reducing EMI (ElectraMagnetic Interference) noises while simultaneously responding to requirements for the high-speed transmission of image data, miniaturization and thinning of a signal processing board. A timing controller outputs, in accordance with an input data signal and input clock signal, a data line driving circuit controlling signal, internal data signal, internal clock signal to a data line driving circuit and outputs a scanning line driving circuit controlling signal to a scanning line driving circuit. The timing controller has a clock signal frequency setting mode in which a frequency of each of clock signals is set to a different value and the clock signals are supplied to the data line driving circuits and other data line driving circuits in one region and another region.

A radiological imaging apparatus capable of improving an arrangement density of semiconductor radiation detectors and detector units thereof, each detector unit consisting of a plurality of combined substrates having a detector substrate which includes semiconductor radiation detectors and a signal processing substrate which includes integrated circuits, housed in a housing. The detector substrate protrudes outward from an opening of the housing. A plurality of detector units are attached to a ring-shaped unit support section in a circumferential direction thereof. More specifically, the detector substrate protrudes inward from the unit support section and the housing is attached to the unit support section.

An information processing device includes: a signal receiving portion that receives a signal in which input data that contains first and second bit values different from one another is encoded such that the first bit value is expressed by first amplitude values and the second bit value is expressed by second amplitude values different from the first amplitude values, and such that the same amplitude value does not occur twice in succession and the polarities of the amplitude values are inverted with each cycle; a clock signal extraction portion that extracts a clock signal by detecting polarity inversions in the received signal; a clock signal subtraction portion that subtracts the extracted clock signal from the received signal; and an input data decoding portion that decodes the input data by determining the first and second bit values based on an amplitude value of the signal obtained by subtracting the clock signal.

Disclosed is a device for detecting electric cable troubles. The device comprises an electromagnetic sensor for rounding electric cable to be detected, a driving source component, a signal processing and displaying unit, and a signal cable. The electromagnetic sensor comprises a group of wires stagger joint between a plug and a socket. The device can be used to detect broken fold in multi-fold core cable, cable insulation and grounding.

The embodiment of the invention discloses a voice signal processing method, an assembly, a device and a medium and aims to improve the flexibility of voice control. The method comprises the steps thata processing assembly separates voice signals from different orientations in received mixed voice signals to obtain multiple channels of voice signals; the processing assembly parallelly identifies part or all of multiple channels of voice signals, wherein parallel identification includes identification of part or all of multiple channels in the way that each channel of voice signals is divided into multiple identification units, wherein each identification unit comprises multiple continuous frames.

The invention relates to a method for detecting the position of a rotor of a PMSM (permanent magnet synchronous motor) without a position sensor, and the method comprises the steps: employing a signalprocessing method for the digital processing of a change process of the back electromotive force of a three-phase winding; extracting some relatively reliable feature position of the back electromotive force in the rotating process of the motor, such as a zero point and extreme points; obtaining the position feature points, and carrying out the estimation of the rotor position information betweenthe feature points through an extended Kalman filtering method, and finally obtaining the accurate position of the rotor. The method is convenient in data collection, is small in calculation burden,is good in real-time performances, and is suitable for the implementation of various types of motor controllers.