46results about How to "Suppress reception" patented technology

The invention discloses a robust covariance matrix diagonal loaded adaptive beam-forming method and mainly solves the problem of loading coefficient determining in the adaptive diagonal loading method in the prior art. The scheme includes: (1) calculating a covariance matrix of radar antenna array receiving signals; (2) solving a linear combination expression of adaptive weight vectors by aid of steering vectors of radar antenna array target signals; (3) solving an identical transformation expression of radar antenna array output power through the covariance matrix and the weight vector expression and defining the remained vectors; (4) constructing a covariance matrix of the remained vectors; (5) leading an inverse matrix of the covariance matrix of the remained vectors to serve as a weighting matrix in a two-step weighted least squares theory and solving loading coefficients of the covariance matrix of the radar antenna array receiving signals; and (6) calculating the adaptive weight vectors to perform beam-forming. The robust covariance matrix diagonal loaded adaptive beam-forming method improves beam-forming performance by adding a noise matrix to reduce covariance matrix eigenvalue dispersion degree.

The invention provides a configuration-based intelligent substation communication network dynamic monitoring system and a monitoring method thereof. The monitoring system includes a network monitoring master station and at least one acquisition early warning terminal module which are connected through an Ethernet. The network monitoring master station is arranged at a station control layer to achieve state monitoring, anomaly alarm, anomaly early warning and management and maintenance of an intelligent substation communication network. Each acquisition early warning terminal module adopts the principle of local arrangement and abuts against network ports of a monitored network device for capturing, analyzing, determining and responding to packet information transmitted by the network ports. The technical scheme provided by the invention adopts a distributed manner to decompose the network acquisition data and data analysis, effectively solves the problems of huge amount of data acquisition of a conventional network monitoring analysis device and difficult data analysis, and achieves quick anomaly early warning and alarm of the network ports.

An apparatus for sound enhancement has at least two microphones (9) that provide a directional microphone array which is arranged to be pointed in the direction of a sound source. The directional microphone array thereby receives sound emitted by the sound source and generates sound signals. A processor (20) processors the sound signals generated by the microphone array to enhance the sound received by the directional microphone array from the sound source relative to other sound received by the directional microphone array. The processor (20) generates a corresponding enhanced signal (ES). Loud speakers (22) reproduce the enhanced signal as audible sound. Furthermore, sound suppression devices (7, 7a) are provided to suppress ambient should from reaching the eardrums of the user. This sound suppression acts in conjunction with the directional microphone array and the processor (20) which enhance the SOI to provide a listening environment in which the SOI is enhanced.

In order to reduce the cost for isolation between a surface coil and a body coil installed on a magnet assembly side, an RF shield for a surface coil is disposed between a body coil installed on a magnet assembly side of an MRI apparatus and a surface coil body not installed on the magnet assembly side. The reception by the body coil of RF pulses transmitted from the surface coil body is suppressed by the RF shield for the surface coil. Since an induced voltage in the body coil drops to a great extent, a switch provided on the body coil side no longer requires a component resistant to high voltage and high current. Thus, the apparatus can be simplified and the cost can be reduced. As a result, the reliability of the apparatus is improved.

A first outward passage 22 and a second outward passage 23 are branched from a branch portion 20 to guide refrigerants to a first evaporator 17 and a second evaporator 18, respectively. In the second outward passage 23 with a longer refrigerant flow path of the first and second outward passages 22 and 23, a second decompressor 19 is disposed closer to the branch portion 20 rather than the second evaporator 18 in the second outward passage 23. Further, a part 23b of the second outward passage 23 located on the downstream side of the refrigerant flow with respect to the second decompressor 19 is defined by an inner pipe of a double pipe 28, and a part of a second return passage 26 is defined by an outer pipe of the double pipe 28.

An on-vehicle antenna system which offers a superior receiving performance, by suppressing reception of reflected / scattered waves coming from inside of the vehicle's cabin; these reflected / scattered waves being an adverse factor which deteriorates signal receiving performance of an antenna. The antenna system is installed at glass pane portion of a vehicle with direction (12) of the greatest radiation pattern (11) directed towards ahead (14) of the vehicle from boundary plane (10) containing power supply portion (9), while direction (13) of the smallest radiation pattern (11) towards behind (15) of the vehicle. The above-configured antenna system can suppress those waves reflected / scattered in the vehicle cabin from being received; as the result, it demonstrates improved characteristics.

A keyless entry system includes an on-vehicle unit and a mobile device, and controls on-vehicle equipment using a wakeup signal and a command signal. The on-vehicle unit radio-transmits a first transmission signal including the wakeup signal and a second transmission signal relating to the detection of an interference wave to the first transmission signal to the mobile device using radio signals having different frequencies. When the first transmission signal has been normally received, the mobile device radio-transmits a third transmission signal including the command signal to the on-vehicle unit and receives a second transmission signal. When the first transmission signal could not be normally received, the mobile device performs the detection of the interference wave to the first transmission signal and radio-transmits a fourth transmission signal for requesting the retransmission of the first transmission signal to the on-vehicle unit.

A receiving array antenna with a variety of channels for converting received signals from receiving antenna elements (ANT) into an intermediate frequency signal (ZF) by using a circuit having one or several preamplifiers (LNA) and a mixer (MIX) connected in series, whereby a centrally generated local oscillator signal (LO) and calibration signal (CAL) are supplied to the circuit. A common distribution network (VNG) is available for the central oscillator signal (LO) and calibration signal (CAL), which is interconnected in such a way that the central local oscillator signal (LO) and calibration signal (CAL) is coupled into the circuit at the output of the receiving antenna element (ANT).

A vending machine includes a vend sensor for detecting a completion of a vend operation. The vend sensor includes an electronic circuit connected to first and second sound elements positioned on opposing sides of a product delivery chute of the vending machine. The first sound element directs a sound beam across the product delivery chute where it is received by the second sound element. During a vend operation, a product container is guided to the product delivery chute to be dispensed to a consumer. As the container passes through the product delivery chute, the sound beam is interrupted, thereby signaling the completion of a vend operation. Each of the first and second sound elements is provided with a cone that focuses the sound beam so as to limit interruptions stemming from outside sound sources.

A laser radar device has a light projection part that projects light to a monitoring area outside a vehicle from a vehicle interior through a glass surface, a light receiving part that is placed a given distance away from the light projection part in a substantially horizontal direction to receive reflected light from an object outside the vehicle in the light projected by the light projection part through the glass surface, a measuring part that measures the distance to the object in the monitoring area based on timing when the light projection part projects the light and timing when the light receiving part receives the reflected light, and a light-projection shielding part that shields the light projected to an outside of the monitoring area in the light projected by the light projection part.

Disclosed is a optical receiving apparatus including a balanced receiver comprising first and second light receiving elements which receive respective optical signals from first and second ports of a 1-bit delay interferometer, monitor units that monitor amplitudes and delays at the first and second light receiving elements, respectively, control units that variably respectively control attenuations and delays on the paths between the first and second output ports of the 1-bit delay interferometer and the first and second light receiving elements, based on monitored results by the monitor units.

A liquid ejecting head is operable to eject liquid toward a target medium. A light emitter is operable to emit light. A light receiver is adapted to receive the light emitted from the light emitter, and operable to output a signal in accordance with an amount of the received light, thereby detecting a position of the liquid ejecting head. A transparent member is elongated in a first direction and disposed between the light emitter and the light receiver. A line pattern is provided with the transparent member so as to oppose the light emitter, and including light transmitting sections and light shielding sections which are alternately arranged in the first direction with a first pitch. Each of the light transmitting sections is adapted to allow the light emitted from the light emitter to pass through. Each of the light shielding sections is adapted to shield the light emitted from the light emitter. A width of each of the light transmitting sections in the first direction varies relative to a second direction perpendicular to the first direction. The light receiver includes a substrate elongated in the first direction. A plurality of light receiving elements are arrayed on the substrate in the first direction such that positions of adjacent light receiving elements relative to the second direction are made different in accordance with the width of each of the light transmitting sections.

The invention discloses a method and system for adjusting parameters of a signal receiving circuit of a downhole repeater. The method comprises the following steps: detecting an error rate of a received signal; determining a gain multiple of a gain amplification circuit according to the error rate; and determining the parameters of an analog filter circuit and the parameters of a digital filter according to the gain multiple and carrier frequency that is set offline according to a test result. By adopting the method and the system disclosed by the invention, the downhole repeater can effectively inhibit wellsite electromagnetic interference and accurately capture weak useful signals to ensure normal work. When the error rate is too high, whether to increase the gain multiple or modify the carrier frequency to avoid the wellsite electromagnetic interference can be automatically determined, and corresponding processing measures are adopted to ensure that the repeater can correctly receive downhole electromagnetic signals to ensure the normal work of the entire system. Practice proves that the method and the system disclosed by the invention are good in electromagnetic interference suppression effect, small in size of a hardware circuit, small in hardware resource occupation, low in production cost, stable in functions and operation and are liable to realize by the existing technological level and processing technique at home.

After a predetermined period of time has lapsed after transmission of a voice data packet representing a first voice section a second voice data packet representing the same voice section is transmitted. On the receiving end, a value for the transmission quality is determined for the first and for the second voice data packet and the one of the two voice data packets is processed that has the better transmission quality.

The invention relates to a self-adaptive multivariate orthogonal wave trap which comprises an input coupling unit, an orthogonal wave trap unit, an output coupling unit and a detection control unit. An antenna signal is input to the input end of the input coupling unit; the first output end of the input coupling unit is connected with the signal end of the orthogonal wave trap unit; the second output end of the input coupling unit is connected with the input end of the detection control unit, and the orthogonal wave trap unit is used for executing orthogonal wave trap on the antenna signal after receiving the control instruction output by the detection control unit and transmitting the obtained useful signal to the output coupling unit. The self-adaptive multivariate orthogonal wave trap comprises the orthogonal wave trap unit and the detection control unit, after a control instruction output by the detection control unit is received, the orthogonal wave trap unit performs orthogonal wave trap on an antenna signal and transmits an obtained useful signal to the output coupling unit, and low-loss transmission of the useful signal and reflection suppression of an interference signal are realized.

A photoacoustic imaging device includes a light source that emits pulsed light at a subject, an ultrasonic transducer that converts vibration of a detection object of the subject that is generated according to the pulsed light to an electric signal, and a controller that selectively activates or deactivates the ultrasonic transducer, the controller deactivating the ultrasonic transducer while the light source emits the pulsed light.

The present invention provides a method for designing a front directional array antenna for suppressing a back signal used in a wireless communication, comprising: (a) an analogous pattern element arranging step for arranging, on a reflecting panel which is a conductor at a predetermined interval, elements having mutual analogous emission pattern characteristic for a short axis (x axis) in which the number of arrangements is small and for a long axis (y axis) which is a perpendicular direction to the x axis; (b) a reception balancing step for forming, in the edge of the reflecting panel, reflecting surfaces having a predetermined angle and length which are symmetric centering on the front surface to direction of electric wave arrived to the elements located in the edge; (c) an x-axis direction signal suppressing step, by x-axis series distribution and synthesis, for performing as many series distribution and synthesis suppressing transfer characteristic in an x-axis direction as the number of y rows, for output distribution and synthesis for the x axis arrangement, in synthesizing a signal of the array antenna after the step (b); (d) a y-axis direction signal suppressing step, by y-axis series distribution and synthesis, for performing series distribution and synthesis suppressing transfer characteristic in a y-axis direction in finally performing distribution and synthesis in the y-axis direction, for output distribution and synthesis for the x axis arrangement; and (e) a back-suppressed sold pattern outputting step for providing result of arrangement signal distribution and synthesis of the y axis to a contact means outside the antenna device.

The Present invention provides a correlator including, a read-out processing circuit that reads out an OFDM signal in RAM as 2n−1 number of delay OFDM signals that are increased and delayed sequentially with their adjusted read-out timings. Complex conjugate circuits that outputs complex conjugates of the inputted nth to 2n−1th delay OFDM signals. Complex arithmetic circuits that perform complex multiplication to inputted original OFDM signal, the first to n−1th delay OFDM signals, and the output signals from the complex conjugate circuits. Moving average processing circuits take the moving average of the GI length, gain adjustment circuits adjust the gains, an adder circuit adds the outputs of the adjustment circuits, and a filter circuit smoothes the addition result. A control circuit variably controls the delay of the delay OFDM signals, the gains of the gain adjustment circuits, and the band characteristic of the filter circuit.

The present technology relates to a signal processing apparatus and method which are able to suppress a reduction in reception sensitivity. A reception signal is compressed so as to have a predetermined signal level or lower, and transmission data transmitted from a transmitter side and included in the reception signal compressed so as to have the signal level or lower is decoded. For example, an approximate replica signal reproducing large amplitude changes of the reception signal is generated, and the approximate replica signal is subtracted from the reception signal to compress the reception signal so as to have the signal level or lower. The present disclosure is applicable to, for example, a signal processing apparatus, a reception apparatus, a transmission / reception apparatus, a communication apparatus, an information processing apparatus, an electronic device, a computer, a program, a storage medium, a system, and so on.

A light emitter is operable to emit light. A light receiver is adapted to receive the light emitted from the light emitter, and operable to output a signal in accordance with an amount of the received light, thereby detecting a position of an object. At least one transparent member is disposed between the light emitter and the light receiver. A first line pattern is provided with the transparent member so as to oppose the light emitter, and includes first light transmitting sections and first light shielding sections which are alternately arranged in a first direction with a first pitch. A second line pattern is provided with the transparent member so as to oppose the light receiver, and includes second light transmitting sections and second light shielding sections which are alternately arranged in the first direction with a second pitch. Each of the first light transmitting sections is adapted to allow the light emitted from the light emitter to pass through. Each of the first light shielding sections is adapted to shield the light emitted from the light emitter. Each of the second light transmitting sections is adapted to allow light having passed through the transparent member. Each of the second light shielding sections is adapted to shield the light having passed through the transparent member.