394results about How to "Simple signal processing" patented technology

A system and method for detecting, monitoring and analyzing physiological characteristics. Signals from a subject are acquired from a suite of sensors, such as temperature, carbon dioxide, humidity, light, movement, electromagnetic and vibration sensors, in a passive, non-invasive manner. The signals are processed, and physiological characteristics are isolated for analysis. The system and method are to analyze sleep patterns, as well as to prevent bed sores or detect conditions such as illness, restless leg syndrome, periodic leg movement, sleep walking, or sleep apnea. However, numerous other applications of the invention are also disclosed.

A transceiver includes a transmitter and a homodyne receiver, wherein the receiver is used to process both antenna-received and antenna-reflected signals. Thus, during a receive mode, for example, the receiver downconverts antenna-received signals to baseband signals, which are then processed to recover receive signal information. Then, during a transmit mode for example, antenna-reflected transmit signals are fed back to the receiver, which is retuned to the desired transmit frequency, and thus downconverts the reflected transmit signals to baseband signals. These baseband signals are then processed to obtain a characterization of impedance mismatch between the transceiver's transmitter and the associated antenna. An adjustable matching network disposed in the transmit signal path thus may be adjusted based on the characterization to reduce the mismatch. Such configurations may be used with either single-band or multi-band embodiments of the transceiver, and the transceiver may be used in both TDMA and CDMA communication systems.

A gain medium 12 and a tunable filter are provided in an optical path of laser oscillation. The tunable filter has an optical beam deflector for periodically changing an optical beam at a constant angular speed, a prism 26 on which deflected light is made incident, and a diffraction grating 27. Appropriate selection of the apex angle α of the prism 26 and an angle β formed by the prism 26 and the diffraction grating 27 can provide a tunable laser light source for changing the oscillation frequency at high speed and a constant variation rate.

An intravascular ultrasound probe is disclosed, incorporating features for utilizing an advanced transducer technology on a rotating transducer shaft. In particular, the probe accommodates the transmission of the multitude of signals across the boundary between the rotary and stationary components of the probe required to support an advanced transducer technology. These advanced transducer technologies offer the potential for increased bandwidth, improved beam profiles, better signal to noise ratio, reduced manufacturing costs, advanced tissue characterization algorithms, and other desirable features. Furthermore, the inclusion of electronic components on the spinning side of the probe can be highly advantageous in terms of preserving maximum signal to noise ratio and signal fidelity, along with other performance benefits.

A wireless distribution system includes a number of remote units distributed in a coverage area to receive wireless signals and to provide the signals through the distribution system to input ports of an expansion unit where the signals are combined, detectors operatively connected to one or more of the plurality of input ports to determine the presence of information carrying signals at the input ports, a number of selection circuits to select signals in which information has been detected, and a node to combine the selected signals.

A method for providing automatic crash management (ACM) is provided. An ACM application is enabled on a mobile device. Data is collected from a plurality of sensors associated with the mobile device. The data from the plurality of sensors is processed with the ACM application. The processed data is monitored with accident logic of the ACM application running on the mobile device to determine whether a crash has been detected. The data from the plurality of sensors is automatically streamed to the off-board server for further analysis upon detection of the crash.

In a method for operating a radar system, the object is to determine by simple means and at low cost the distance and / or the radial velocity of at least one target object with high resolution. For this purpose, in each measuring phase of the measurement process in the "pulse FMCW radar system", switchover between a transmission mode and a receiving mode is effected a multiple number of times and at short intervals of time. In the transmission mode, all receiving units of the radar system are switched off, while a pulse-shaped (frequency-modulated) transmission signal with time-successive transmission pulses having a specific pulse-on time and a specific carrier frequency is emitted from at least one transmitter unit of the radar system. In receiving mode, all transmitter units are switched off in the pulse-off times of the transmission pulses, while from at least one receiver unit all reflection signals originating from the last emitted transmission pulse are detected as received signal from the entire observation range before emission of the next transmission pulse. The distance and / or the radial velocity of the reflection objects is determined indirectly by the signal processing unit of the radar system by evaluation of the frequency difference and / or phase difference between the transmission signal and the received signal.

An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwidth of the feedback cancellation signal, the distortion due to the adaptive filter is minimized and limited only to the unstable feedback regions. A relatively simple signal processing algorithm is used to produce highly effective results with minimal signal distortion.

An automotive radar which can process signals at high speed to detect a target in a wide angle range is provided. The automotive radar comprises a transmitting antenna which emits an electromagnetic wave, two receiving antennas which receive the electromagnetic wave reflected by a target, an antenna plate on which the transmitting antenna and two receiving antennas are arranged. It also includes a drive which rotates the antenna plate in an azimuth direction, which corresponds to the direction of arrangement of the two receiving antennas, to scan a detection angle formed by the two receiving antennas. The drive has rest time between scans to stop rotation. The automotive radar also includes a signal processor which detects the azimuth angle of the target with respect to a reference direction during the rest time according to received signals from the two receiving antennas and the rotation angle of the antenna plate at rest.

In an alignment method for effecting alignment between two plate-like objects, a first plate-like object provided with a first alignment mark and a second plate-like object provide with a second alignment mark are disposed opposite to each other. A first area and a second area are provided at mutually nonoverlapping positions in an image pickup area for being observed through an image pickup device. Images of the first and second alignment marks are picked up by the image pickup device from a direction substantially perpendicular to an in-plane direction of the first and second plate-like objects. Alignment control is effected by using first information about a deviation of the first alignment mark from a predetermined position in the first area and second information about a deviation of the second alignment mark from a predetermined position in the second area.

A system for linearizing the output of a high power amplifier (HPA) designed to transmit an RF modulated signal includes in its transmit section a digital up-converter for processing baseband input signals and generating a desired digital RF waveform, T(s). The desired digital RF waveform T(s) is then fed to a digital predistorter circuit for producing a predistorted digital RF waveform P(s)T(s) which, as modified, may be applied via a high sampling speed high linearity digital to analog converter to the high power amplifier (HPA) to produce an output signal which is a linear function of the baseband input signal. The digital predistorter circuit may be of the adaptive type or of the predictive type. Circuits embodying the invention may include encoding circuitry for converting multi-bit signals to a serial stream of single-bit pulses for enabling simplification in the digital to analog conversion. In accordance with the invention, corrections for non-linearity of the HPA may be made directly on the RF waveform using ultra-high speed superconducting electronics (SCE) and decreasing the time delay between sensing a transmitted signal and generating a correcting (linearizing) signal.

An automotive radar which can process signals at high speed to detect a target in a wide angle range is provided. The automotive radar comprises a transmitting antenna which emits an electromagnetic wave, two receiving antennas which receive the electromagnetic wave reflected by a target, an antenna plate on which the transmitting antenna and two receiving antennas are arranged. It also includes a drive which rotates the antenna plate in an azimuth direction, which corresponds to the direction of arrangement of the two receiving antennas, to scan a detection angle formed by the two receiving antennas. The drive has rest time between scans to stop rotation. The automotive radar also includes a signal processor which detects the azimuth angle of the target with respect to a reference direction during the rest time according to received signals from the two receiving antennas and the rotation angle of the antenna plate at rest.

The manual control device for executing functions of an electronic watch (1) particularly a diary watch, includes a certain number of sensors (C1 to C7) wherein one touch sensitive pad of each sensor is placed for example on an internal face of the crystal (4). When a user's finger (20) is placed on the watch crystal in a determined zone of the sensitive pad of a sensor to be activated, it causes an electronic circuit (14) of the device to execute an instruction or a function. In a first mode selected by the electronic circuit, at least two sensors are grouped such that the electronic circuit executes the same operation when a finger is placed on the crystal in a determined zone of the sensitive pad of one sensor or the other. However, in a second mode selected by the electronic circuit, each sensor (C1 to C7) activated by the finger (20) provides measuring signals to the electronic circuit (14) for the execution of a different specific operation for each sensor.The sensitive pads of the sensors are distributed on the internal face of the crystal for the purpose of allowing data to be entered into the watch, pre-stored data to be consulted or different function menus to be consulted.

A drive method for a solid-state imaging device having an oblique pixel pattern includes the steps of: adding, separately for an odd-numbered row and an even-numbered row, x pixels in the horizontal direction and y pixels in the vertical direction, the x pixels and the y pixels having the same color, in an area having adjacent n pixels in the horizontal direction and adjacent n pixels in the vertical direction, where n is an odd number of three or greater and n≧x≧y; and repeatedly adding the x pixels and the y pixels while shifting the n×n area by m pixels in the vertical or horizontal direction, where m is an odd number of three or greater. The n×n area of odd-numbered rows is displaced from that of even-numbered rows by m pixels in the oblique direction in the oblique pixel pattern.

This invention relates to coherent laser range finder which can obtain target position information and its method of measuring distance. This cohere laser range finder uses continuous wave and cohere detection system. System includes transmitter and receiver. Transmitter is constructed of launching laser device, light modulator, launching optical system. Receiver is constructed of receiving optical system, local oscillator laser device, light bridging device, photo detector, phase locked loop, CCD pick-up camera and interference image manipulation software. Receiver gets transmission distance information by cohere detection, meanwhile uses backward wave and local oscillator light wave to get interference figure on the CCD pick-up camera, obtains target position information and target distance information by computer image processing and analysis, real-time controls machine electricity part of optical system, ensures launching telescope and receiving telescope of rangefinder to aim at target. This invention can implement cohere laser measuring distance of consummate function, largest measuring distance. This invention can be used for cohere laser correspondence.

A communication quality is improved or signal processing is simplified in a multi-carrier communication system such as OFDM. Information different in communication quality such as systematic bits and parity bits of turbo encoded code words is combined together, and information that requires a high communication quality such as the systematic bits is mapped to carriers having a frequency close to the carriers in which the pilot signal exists used as a reference phase of demodulation than the information such as the parity bits which does not require the high communication quality such as the systematic bits.

A passive infra-red detector including at least three sub-detectors, each sub-detector being operative to receive infra-red radiation from a corresponding one of at least three sub fields-of-view, each sub field-of-view being exclusively defined by an optical element which does not define any other sub field of view, the sub fields-of-view being angled with respect to each other, adjacent ones of the sub fields-of-view being separated by a gap of no more than 30 degrees and at least one of the sub fields-of-view having at least one of the following characteristics: extending over no more then 45 degrees in azimuth; and including not more than three azimuthally distributed detection zones, and signal processing circuitry, operative to receive output signals from the sub detectors and to provide a motion detection output.

A position detector arrangement for detecting a position of a packaging material with magnetic marking comprises a sensor assembly comprising a plurality of magnetic sensor units each comprising an output providing an output signal. The magnetic sensor units are arranged in at least two sensor unit pairs, with the sensor units of each pair arranged with opposite sensitivity directions, and with the sensor units arranged to sense magnetic markings of the packaging material. A signal processing assembly is connected to the outputs of the magnetic sensors and comprises a combiner arranged to aggregate the output signals of the sensors to an aggregated signal; and a detector arranged to determine the position of the packaging material from the aggregated signal. Further, a method for detecting a position of a packaging material with magnetic markings is disclosed.

A sound image localization device which includes a signal source for outputting an audio signal, a signal divider for dividing the audio signal output from the signal source into two digital audio signals respectively for two channels, and a first signal processor for receiving one of the two digital signals and processing the digital signal so as to localize a virtual sound image using a filter having a first frequency characteristic. In addition, the sound image localization device includes a first D / A converter for converting the digital signal output from the first signal processor into an analog signal, a second D / A converter for receiving the other digital signal obtained from the signal divider and converting the signal into an analog signal, a first control speaker for outputting the audio signal obtained by the first D / A converter to a prescribed space area; and a second control speaker for outputting the audio signal obtained by the second D / A converter to a prescribed space area.

A signal processing circuit includes a first circuit including a first clock signal generator with an output for a first clock signal and a second clock signal generator with an output for a second clock signal and an input for a comparison signal. The second clock signal is generated by the second clock signal generator based on the comparison signal. A second circuit includes a phase detector with a first input for the first clock signal, with a second input for the second clock signal and an output for the comparison signal indicating a relation between the phases of the first clock signal received at the first input and the second clock signal received at the second input.

Pulsed radar detects the presence and range of very short-range objects via small perturbations in phase and / or amplitude of relatively long duration coherently related transmit pulses. In one embodiment, echoes forming a received signal waveform from a sampling baseband radar receiver are processed at audio frequency to look for perturbations of the phase of the time-stretched received radar signal while the radar is still transmitting a long-duration pulse. In a second embodiment, the time-stretched received signal is processed to look for perturbations in the amplitude of the received radar signal. Small amplitude perturbations due to constructive and destructive interference of the transmitted and reflected signals occur in the receiver when objects are very close to the radar if the receiver is not heavily saturated. These same techniques can also be used to achieve highly accurate ranging of long-distance objects and detection of overlapping echoes from multiple objects.

Traffic sensing and monitoring apparatus (100) comprises a length of optical fiber (112), means (102, 103, 104, 106, 107, 109, 119) arranged to introduce a series of pulse pairs into an input end of the length, each of the pulse pairs comprising first and second pulses of radiation having a frequency difference Ω and the second pulse being delayed with respect to the first by a delay τ, and the apparatus further comprising a photodetector arranged to detect radiation which is Rayleigh-backscattered within the length of fiber towards the input end to generate an output signal in response thereto. Apparatus of the invention allows sensing and monitoring of traffic at any position along a long length of road (e.g. 5 km) with lower installation and maintenance costs per unit length compared to prior art systems providing the same spatial resolution.

A motor driving circuit receives a control pulse signal pulse-width modulated according to a target rotational speed, and drives a fan motor. A start pulse signal generating unit generates a start pulse signal having a predetermined duty ratio. A driving unit drives the fan motor by pulse width modulation according to the driving pulse signal received from a control unit. When the duty ratio of the control pulse signal is switched from zero to a nonzero value when the fan motor is in the stopped state, the control unit commences the driving operation for the fan motor. The control unit outputs, as the driving pulse signal, the start pulse signal, in a predetermined start period Ts from the commencement of the driving operation. After the start period elapses, the control unit outputs the control pulse signal as the driving pulse signal.

In a cable television converter terminal, NICAM signal passthrough is achieved using an alignment-free passthrough circuit including a NICAM SAW filter. The alignment-free passthrough circuit directly taps the output of the converter terminal's tuner to obtain the NICAM signal. As a result, the NICAM signal is not distorted by the components involved in obtaining the other signal components of the cable television signal. Consequently, sound quality is improved and rendered less vulnerable to degradation due to component aging, temperature fluctuations, and human error. The passthrough circuit can be implemented as a removable circuit module.

The method comprises operating an engine and collecting a real-time accelerometer signal from an accelerometer sensor. The real-time accelerometer signal is digitized and filtered to isolate data in a frequency range associated with combustion to produce a filtered signal data set. The filtered signal data set is integrated to produce an integrated signal data set, and misfire is detected by comparing the integrated signal data set with a predetermined reference data set associated with the same operating point. The apparatus is a control system for an engine that comprises an accelerometer sensor mounted to the engine; a look-up table in which is stored predetermined reference data sets, in association with predetermined operating conditions; and an electronic controller programmed to carry out the foregoing method.

A signal processing apparatus, being configured for transmitting and receiving coherent parallel optical signals, comprises a transmitter apparatus including a first single soliton micro-resonator device and a modulator device, wherein the first single soliton micro-resonator device is adapted for creating a single soliton providing a first frequency comb, wherein the first frequency comb provides a plurality of equidistant optical carriers with a frequency spacing corresponding to a free spectral range of the first single soliton micro-resonator device, and the modulator device is adapted for modulating the optical carriers according to data to be transmitted, and a receiver apparatus including a coherent receiver device with a plurality of coherent receivers and a local oscillator device providing a plurality of reference optical signals, wherein the coherent receiver device and the local oscillator device are arranged for coherently detecting the transmitted modulated optical carriers, wherein the signal processing apparatus further includes at least one second single soliton micro-resonator device having a free spectral range being equal or approximated to the free spectral range of the first single soliton micro-resonator device and being adapted for creating at least one single soliton providing at least one second frequency comb, wherein the at least one second frequency comb provides at least one of additional optical carriers and the reference optical signals. Furthermore, a signal processing method, including transmitting and receiving coherent parallel optical signals via a communication channel is described.

A personal computer system enables simultaneous use of a relative-coordinate-mode input device and an absolute-coordinate-mode input device, thereby allowing correct input of absolute coordinate data, such as for characters. A pad-type first input device and a stick-type second input device are provided for a notebook computer. The first input device outputs both absolute coordinate data and relative coordinate data. The second input device outputs only relative coordinate data. When the absolute coordinate data is output, the relative coordinate data format is converted into the same format as the absolute coordinate data, and ID information for distinguishing the relative coordinate data from the absolute coordinate data is added to part of the relative coordinate data format.

The method comprises operating an engine and collecting a real-time accelerometer signal from an accelerometer sensor. The real-time accelerometer signal is digitized and filtered to isolate data in a frequency range associated with combustion to produce a filtered signal data set. The filtered signal data set is integrated to produce an integrated signal data set, and misfire is detected by comparing the integrated signal data set with a predetermined reference data set associated with the same operating point. The apparatus is a control system for an engine that comprises an accelerometer sensor mounted to the engine; a look-up table in which is stored predetermined reference data sets, in association with predetermined operating conditions; and an electronic controller programmed to carry out the foregoing method.

A color solid-state image capturing apparatus is provided, where a plurality of light receiving sections are arranged on a light receiving surface of an image capturing area, a plurality of color filters are positioned in a constant period above the plurality of light receiving sections, and a plurality of microlenses for focusing light on the plurality of respective light receiving sections are positioned on the plurality of color filters, and a plurality of color signals are output in accordance with the plurality of color filters, where the constant period of the plurality of color filters is defined as a unit, and the size of the plurality of microlenses is variable for each light receiving section so that the ratio of the plurality of color signals is constant in the unit.