49results about How to "Enhance received signal" patented technology

Methods and systems for a mixed time-frequency domain compander, where the expander and compressor are applied in the frequency domain (subbands), while the limiter and the linear gain are applied in the time-domain (full band). Far-end noise reduction is achieved by adapting the expander gain to the far-end noise, near-end noise compensation is achieved by adapting the linear gain and the compressor gain to the near-end noise. The range of the linear gain section is set individually for each subband, but the linear gain is essentially applied to the full band signal via a scaling procedure. The scaling procedure first reduces the compander gain in the frequency domain by a scaling factor and then performs the reciprocal reverse scaling in the time domain. Far-end noise reduction is coupled to near-end noise compensation in order to avoid cross-modulation of the far-end noise by the near-end noise.

An antenna device includes a feeding member including a coil pattern and an emitting member to emit a transmit signal supplied from the feeding member and to receive a receive signal and supplying it to the feeding member. The emitting member includes an opening portion and a slit portion communicating with the opening portion. When seen in plan view from the direction of the winding axis of the coil pattern, the opening portion of the emitting member and the inner region of the coil pattern overlap each other, and the emitting member and the coil pattern overlap each other at least partially.

A laser scanner, in particular a safety laser scanner, in accordance with the operating principle of the time of flight process, comprising a light transmission unit having at least one light transmitter for transmitting a polarized transmitted light beam into a monitored zone; a light reception unit having at least one light receiver for detecting the polarization component of the light reflected in the monitored zone being orthogonal to the polarization direction of the transmitted light beam, and/or the polarization component of the light reflected in the monitored zone being parallel to the polarization direction of the transmitted light beam, and for generating a received signal corresponding to the detected orthogonal polarization component and/or the detected parallel polarization component; and an evaluation unit configured to evaluate the time development of the detected orthogonal polarization component and/or of the detected parallel polarization component.

An optical system for a laser range finder comprises a laser emitter (5), a collimating lens (4) positioned in front of the laser emitter an optical receiver (3), a light receiving aspheric lens (1) for converging reflected light from a target object to be measured on the optical receiver, and a polygonal prism (2) disposed between the light receiving aspheric lens and the optical receiver. The light receiving aspheric lens defines a cutout in a position corresponding to a laser light beam emitted by the laser emitter for allowing passage of the laser light beam therethrough. The polygonal prism consists of a first portion and a second portion refracting the reflected light at different refraction angles for light path compensating purposes.

In a transmit/receive system, the carrier frequency offset (CFO), I/Q imbalance, and DC offset (DCO) can cause serious signal distortions. These analog losses can be compensated for individually or in combination of any two of them by following various methods that have been suggested. However, there have suggested no methods of simultaneously compensating, for these three types of losses that occur in actual devices at the same time. The present invention suggests a novel pilot signal that has a cyclic signal portion and a portion of two equally spaced continual signals. The invention provides a method for compensating for the CFO, I/Q imbalance, and DCO by simultaneously performing the time domain compensation and the channel estimation using those signal portions. The method also compensates for the I/Q imbalance and the channel response on the transmitter side in the OFDM scheme.

A subject information obtaining apparatus includes a probe including a receiver that receives an acoustic wave to be converted to an electric signal and first and second irradiation units that irradiate mutually different areas on a subject surface with pulsed light, a control unit that controls illumination positions of the pulsed light to avoid continuous irradiation of the subject with the pulsed light from the first and second irradiation units, and a signal processing unit that performs averaging or integrating of electric signals derived from the pulsed light illuminated from the first and second irradiation units and obtains a characteristic distribution in the subject by using the averaged or integrated signal or performs combining of distributions obtained by using electric signals derived from the pulsed light illuminated from the first and second irradiation units and obtains a combined distribution as the characteristic distribution in the subject.

An ultrasound transducer assembly (50), in particular for ultrasound imaging systems (10), is disclosed, comprising a transducer array (52) including a plurality of transducer elements (54) for emitting and receiving ultrasound waves (56). Each of the transducer elements (54) includes a first electrode (66) connected to a flexible membrane (64) and a second electrode (70). The assembly further comprises an integrated circuit device (60) connected to the transducer array (52) for driving the transducer elements (54), wherein the first electrodes (66) are electrically connected to each other and coupled to the integrated circuit device (60) for providing an alternating drive voltage to each of the transducer elements (54), wherein the second electrodes (70) are connected to a voltage supply for providing a bias voltage to the transducer elements (54), and wherein the first electrodes (66) are each connected by means of a via (76) to the integrated circuit device (60) and the vias (76) are fed through the second electrodes (70).

The invention discloses an underwater laser line scanning digital imaging system which comprises an upper computer module (8), a cylindrical pressure resistant shell (9), a laser module (1), an optical-mechanical-electrical scanning module and a digitization camera shooting module, wherein the laser module (1), the optical-mechanical-electrical scanning module and the digitization camera shooting module are installed inside the shell (9). The laser module (1) comprises a solid-state frequency doubling laser device, an optical focusing system and a laser control system. The optical-mechanical-electrical scanning module comprises an input reflecting mirror (2), an optical subsystem (3) and an output reflecting mirror (4), wherein the optical subsystem (3) comprises an optical trigger, a motor and a rotary shaft driven by the motor. The digitization camera shooting module comprises an incident hole (5), a receiving machine (6), a low-noise pre-amplifier and a video processing system (7). The upper computer module (8) comprises a keyboard, a mouse and a video monitor. According to the underwater laser line scanning digital imaging system, back scattering influences in absorption and scanning water space can be reduced to the maximum degree, and a high-resolution image can be provided.

An antenna of a high-frequency front end circuit is connected to a duplexer and a filter. A reception-side filter of the duplexer is connected to a first reception signal output terminal. The filter is connected to the ground with a terminating resistor interposed there between. The reception-side filter is a filter which has a pass band including a frequency range of a reception signal having a first frequency band. The filter is a filter which has a pass band including a frequency range of a communication signal having a second frequency band and which has an attenuation range including the frequency range of the reception signal having the first frequency band.

A receiver unit comprising a signal input configured to receive a receive signal including a plurality of data symbols, a symbol detection circuit configured to detect a subset of data symbols, a reliability measuring circuit configured to determine a reliability value for the data symbols, a feedback loop configured to detect the subset of data symbols and the reliability value iteratively, and a signal output circuitry configured to determine output values of the subset of data symbols on the basis of the detected subset of data symbols and the determined reliability value.

An aspect of the present invention provides an RFID tag system in which a null point is hardly generated. The RFID tag system includes an RFID tag and an RFID reader/writer. The RFID reader/writer includes a transmitter that transmits a circularly-polarized radio wave to the RFID tag, a receiver that separately receives horizontal and vertical polarization components of a return wave from the RFID tag; and a received signal combiner that logically combines signals separately received by the receiver. The received signal combiner includes an optimum combiner that combines the horizontal polarization component and the vertical polarization component such that an S/N ratio of the received signal is enhanced compared with the case that the horizontal polarization component and the vertical polarization component are separately received.

The invention provides a multi-domain wireless broadcast multicast loudspeaker based on internet control, which comprises a fixed base, a fixed frame is fixedly mounted on the upper side of the fixed base, a main body is fixedly mounted on the upper side of the fixed frame, a mounting part is fixedly mounted on the right side of the main body, a loudspeaker part is fixedly mounted on the right side of the mounting part, and a loudspeaker is fixedly mounted on the right side of the loudspeaker part. A driving power supply is arranged in the main body, and a loudspeaking mechanism is arranged in the mounting part. According to the multi-domain wireless broadcast multicast loudspeaker based on Internet control, an electrostatic adsorption plate is arranged, a friction ball and a friction plate are driven by a fixing rod to continuously rub, then static electricity is generated on the electrostatic adsorption plate, and when air passes through the electrostatic adsorption plate, the generated static electricity can adsorb dust in the air, so that the dust in the air is adsorbed, and the dust in the air is prevented from being adsorbed. Therefore, dust is prevented from entering the interior of the device, the situation that heat dissipation of the device is affected by too much dust is effectively prevented, and the service life of the device is prolonged.

The invention discloses an antenna switching method, device and equipment, and a computer readable storage medium, and belongs to the technical field of communication. The method comprises the steps of obtaining signal quality and an electromagnetic wave absorption ratio of two antennas; detecting the signal quality of the first antenna, the signal quality of the second antenna and a preset signalquality threshold; when the signal quality of the first antenna and the signal quality of the second antenna are both greater than a preset signal quality threshold, selecting the antenna with a smaller electromagnetic wave absorption ratio as a working antenna; when one of the signal quality of the first antenna and the signal quality of the second antenna is smaller than a preset signal qualitythreshold, selecting the antenna with higher signal quality as a working antenna; by detecting and comparing the current signal receiving quality of the two or more antennas with the SAR value, carrying out switching, so that the terminal works on the antenna with better signal quality and smaller SAR value, the harm to a human body is avoided, the received signal of the terminal is improved, anda user has better user experience.

A system for determining a relative position and/or a relative distance of a transmitter with respect to a receiver, including: the transmitter for wirelessly emitting signals at the time t_i, the receiver or receiving a signal at the time t_i+Δt, wherein the receiver is configured to determine the following: a signal level P and/or a signal-to-noise ratio SNR of the received signal, a direction of incidence of the received signal and, on the basis of P and E, a relative position POS of the transmitter with respect to the receiver and/or a relative distance D between the transmitter and the receiver, and another transmitter connected to the receiver and intended to wirelessly transmit P, SNR, POS, and/or D to another receiver connected to the transmitter.

A pet tracking device, system and method using a kinetic motion energy generator to generate electrical energy that is used to power a pet tracking mechanism are provided. The pet tracking device mayinclude a housing on a wearable item, such as a collar, attached to the pet or may be injected underneath the skin of the pet.

A system for receiving radio stations includes: at least one A/D converter in order to digitize the entire desired frequency band, for instance, an FM band, received via at least one antenna, and a demodulation unit for demodulating at least two signals of different transmitting frequencies of a radio station.

A signal amplifying apparatus and method selectively amplify a received signal according to the strength of the received signal. The signal amplifying apparatus includes a signal receiving unit for outputting a state signal according to a state of a received radio frequency (RF) signal, an amplifying unit for amplifying the received RF signal and a control unit for determining whether to operate the amplifying unit according to the output state signal.

The invention discloses a device for improving the installation efficiency of an external liquid level meter and an application method thereof. The method comprises the following steps: (1) arranging a mounting plane on the outer side of the bottom wall of a container on which a measuring head is arranged; (2) fixing a measuring head mounting seat on the mounting plane; (3) arranging the measuring head on the measuring head mounting seat on the mounting plane and closely matching the measuring end face of the measuring head with the mounting plane; (4) arranging a self-cleaning device on the inner side of the bottom wall of the container corresponding to the mounting plane and making the self-cleaning device vertical to the inner side of the bottom wall of the container; and (5) arranging a waveguide and keeping the central line of the waveguide concentric with the central line of the measuring head. The device has the advantages of improving vibration signal transmission efficiency between the measuring head and the bottom wall of the container, shorting installation time and improving installation efficiency, automatically cleaning the inner side of the bottom wall of the container opposite to the measuring head and preventing the deposition of deposit from affecting signal transmission and preventing liquid level from fluctuating severely when liquid flows inwards by using the waveguide.

A communication system in which a reception signal can be accurately obtained from a signal transmitted over two-wire type transmission lines without any significant reduction in the communication speed. The communication system utilizing two-wire type transmission lines for transmitting transmission signals in opposite phases has a plurality of nodes connected to the two-wire type transmission lines, and each of the nodes incorporates terminating resistors acting upon the two-wire type transmission lines. A node which includes a reception circuit for receiving a transmission signal has an AC coupling circuit for extracting AC components in a transmission signal input through the transmission lines, a bias circuit for applying a bias voltage to a signal output from the AC coupling circuit and a clip circuit for clipping the level of a signal output from the bias circuit, which are provided at each of the two-wire type transmission lines.

The invention discloses an antenna and electronic equipment including the antenna, belonging to the field of communication. Embodiments of the invention provide the antenna and the electronic equipment including the antenna. The antenna comprises a high-frequency module, a low-frequency module, a switch module, a matching module and a feed module, wherein one end of the high-frequency module is connected to the feed module, and one end of the low-frequency module is connected to the feed module; the high-frequency module and the low-frequency module are L-shaped components respectively, wherein the high-frequency module and the low-frequency module are located in a clearance area; the high-frequency module is used for receiving a high-frequency signal and the low-frequency module is used for receiving a low-frequency signal; the matching module is used for transmitting any one of the high-frequency signal and the low-frequency signal; and the switch module is used for controlling the antenna for receiving any one of the high-frequency signal and the low-frequency signal. The antenna is not only smaller in size, but switchover of the antenna between reception of the high-frequency signal and reception of the low-frequency signal is implemented, and the frequency application range of the antenna is further improved.

The invention discloses an architecture structure of a communication tower for electronic information engineering. The architecture structure comprises a supporting mechanism, wherein an assembling mechanism is arranged at the top of the supporting mechanism. The architecture structure further comprises a fixing mechanism arranged at the top of the assembling mechanism, the fixing mechanism comprises a fixing plate, the bottom of the fixing plate is connected with the top of the assembling mechanism, a lightning rod is arranged at the center of the top of the fixing plate, and an adjusting mechanism is arranged at the top of the fixing mechanism. A fixing motor rotates to drive a fixing gear to rotate, an auxiliary motor drives a rotating rod to rotate to drive a mounting plate and a connecting plate to move, then through pushing of an electric telescopic rod and positioning of a fixing telescopic rod, and connection between an antenna body and an elastic mounting piece, the angle of a communication tower antenna can be adjusted in multiple directions, and received signals of the communication tower are increased; and through arrangement of a storage rod, a threaded rod, a moving rod, a fixing rod, a blocking rod and anti-skid protrusions, the communication tower can be fixed, and the stabilizing effect of the communication tower is improved.