53 results about "Frequency shaping" patented technology

The present invention relating to a time domain synchronous quadrature frequency division multiplex modulation method with low peak value average power ratio belongs to digital information transmission technical field. The method includes follows, after forward error correction and modulation, to send inputted data code stream to PADR processing module formed by FFT conversion and frequency reshaping and then to obtain a OFDM letter of low peak value average power ratio after it having been converted by IFFI and to be sent out. At the same time receiving end can adopt different equalizing methods. The present invention has overcome the shortcomings of high time peak value average power ratio in multicarrier frequency modulation method and frequency domain or/and time domain channel equalizing method can be applied flexibly.

The invention regards a method for sound processing in an audio device wherein an audio signal is provided and the audio signal is frequency shaped according to the need of a user of the audio device and the frequency shaped signal is served at the user in a form perceivable as sound. According to the invention at least two different frequency shaping schemes are available and a choice is made of the frequency shaping scheme to be used.

The invention relates to a listening device comprising an ear-part adapted for being worn in or at an ear of a user, a front and rear direction being defined relative to a person wearing the ear-part in an operational position. The invention further relates to a method of operating a hearing instrument, to its use, to a listening system, to a computer readable medium and to a data processing system. The object of the present invention is to provide localization cues for indicating a direction of origin of a sound source. The problem is solved in that the listening system comprises (a) a microphone system comprising at least two microphones each converting an input sound to an electrical microphone signal, (b) a DIR-unit comprising a directionality system for providing a weighted sum of the at least two electrical microphone signals thereby providing at least two directional microphone signals having maximum sensitivity in spatially different directions and a combined microphone signal, and (c) a frequency shaping-unit for modifying the combined microphone signal to indicate directional cues of input sounds originating from at least one of said spatially different directions and providing an improved directional output signal. This has the advantage of providing an alternative or an addition to natural localization cues. The invention may e.g. be used in listening devices, e.g. hearing instruments, head phones, headsets or active ear plugs.

The invention relates to an ultra-fast laser continuous imaging device and method based on frequency domain space-time transformation, and belongs to the field of ultra-fast imaging. The device comprises an ultra-short pulse laser, a chromatic dispersion delayer, a time domain frequency shaping device, a first wide wave band reflector, a second wide wave band reflector, a space domain frequency shaping device and a two-dimensional CCD spectrograph. According to the method, the ultra-short pulse laser is used for producing the laser light within the spectral range, the chromatic dispersion delayer is used for changing the delay interval, the time domain frequency shaping device and the space domain frequency shaping device are used for shaping the frequency components of the laser light, the two-dimensional CCD spectrograph is used for carrying out detecting after the laser light passes a sample, and then the electron dynamic state of the sample can be obtained. By means of the device and method, the time resolving power can be improved to the femtosecond level, continuous shooting is achieved, complete shooting is carried out on the process without the repeated experiment condition, the shooting period and the shooting number can be controlled and adjusted, and the spectrograph is used for replacing an imaging system, and implementation is easy.

A plant controller controls a plant modeled in a discrete-time system. The controller uses a frequency-shaping response-designating control algorithm having a filtering function to cause a difference between output of the plant and a target value to converge. Thus, the plant is robustly controlled without causing undesired frequency components. When the plant is an engine, the engine is modeled using a ignition timing corrective quantity as input and a rotational speed as output. The controller performs the frequency-shaping response-designating control algorithm to determine the ignition timing corrective quantity. The frequency-shaping response-designating control may be frequency-shaping sliding-mode control. In one embodiment, the control input into the plant may includes a corrective term for stabilizing an internal variable of the filter, a corrective term for stabilizing the difference between the output of the plant and the target value and a corrective term that varies depending on a switching function.

In order to control an attitude of a movable object having a flexible member (50) through an attitude maneuver, first, based on vibration of the flexible member at the time of the attitude maneuver, for example, a sampling function including no frequency components equal to or higher than a particular frequency is obtained. With the use of the sampling function, a control target value is created as a previously-frequency-shaping-type feedforward control law. Based on the control target value, attitude control data is created. The attitude control data can be used for the attitude maneuver with respect to the movable object.

A compact fetal sound system delivers high-fidelity sound to a fetus in utero through a miniature, abdominally mounted driver with a convex diaphragm. No gel is necessary at the interface between the diaphragm and the mother's abdomen. Digital signal processing shapes the frequency spectrum of the sound transmitted to the fetus, so that after traveling through the attenuative tissue of the expectant mother the desired volume of sound and frequency content reach the ears of the fetus. As the term of pregnancy progresses, the frequency shaping provided by the digital signal processing automatically varies to compensate for changes in uterine lining thickness and the like. Preferred embodiments also include a microphone attached to the abdomen of the mother and signal processing to correct for frequency and amplitude distortions of sound eminating from the womb. Embodiments also include an elastic belt to maintain the transducer and microphone against the abdomen.

The invention relates to the communication technical field, and discloses a method and a device for eliminating signal peak power. The method for eliminating the signal peak power comprises the following steps that: acquiring amplitude and a phase of a complex-number signal obtained after superimposing multiple carrier signals; detecting a peak value according to the acquired amplitude and a set threshold, and seeking a noise signal according to the peak value detection result and the acquired phase; completing the frequency shaping of the noise signal through the multi-grade noise shaping filtering processing of the sought noise signal; and completing the elimination of the signal peak power by processing counter-clipping of the noise signal after the frequency spectrum shaping and the complex-number signal. By adopting multi-grade noise shaping technology, the method and the device for eliminating the signal peak power are not only suitable for the signal with broadband or ultra-wide-band continuous frequency band, but also are suitable for the signal with mixed mode of common mode of time division-synchronous code division multiple access long term evolution (TD-LTE) and time division-synchronous code division multiple access (TD-SCDMA), or the method and the device can effectively eliminate a peak power point of a single LTE (Long Time Evolution) signal.

A sample and hold in a switched capacitor circuit with frequency shaping. The sample and hold does not require a pair of large area, power-consuming operational amplifiers and, as such, consumes less power and less area. Preferably, the sample and hold is operable in four different states wherein a different set of switches are closed in each of the four states. The switches are controlled by two clock signals and a plurality of signals derived from the two clock signals, such as four signals derived from the two clock signals. Desirably, the sample and hold with frequency shaping is configured to sample a voltage across a first capacitor while a second capacitor is disconnected from said first capacitor, and is configured to thereafter connect the second capacitor to the first capacitor and possibly discharge at least a portion of a charge held in the first capacitor into the second capacitor.

The invention discloses a method for measuring surface deformation under the action of interconnected metal wire force and galvanic coupling and belongs to the technical field of deformation detection and optical measuring mechanics. The method for measuring surface deformation under the action of interconnected metal wire force and galvanic coupling produces gratings on an interconnected metal wire surface by using an ion beam lithography method or an electron beam lithography method, implements loading by a force/electricity coupled loading system, captures grating images before the loading and in the loading process in real time by an optical microscope and an image collecting device, and obtains deformation information of the interconnected metal wire surface by a digital moire method, the wavelet transformation and the phase shift technique. The grating that is produced by the method for measuring surface deformation under the action of interconnected metal wire force and galvanic coupling has high quality and adjustable frequency shape, can exert multiple loads such as consistent stress/varying current, consistent current/varying stress, and consistent stress/consistent current fatigue, etc., on a test sample, has the advantages of real-time in-situ measurement, large measurement view, high sensitivity, no contact, simple operation, convenient data processing and high measurement precision, and has particular superiority in the research of the interconnected metal wire surface deformation.

A frequency synthesizer is described illustrating a method for modulation having improved frequency shape for spread spectrum modulation. In particular, the a standard curve is generated, wherein the standard curve modulates an input signal to generate a spread spectrum of frequencies with reduced amplitude and spreading of bandwidth. The standard curve is sampled at a sampling frequency. The length of the standard curve is adjusted such that critical points of the standard curve are captured.

A data storage device includes a disk, a head, a microactuator, a coarse actuator, and a servo controller. The microactuator is configured to position the head relative to the disk. The coarse actuator is configured to position the microactuator relative to the disk. The servo controller is configured to generate an adjusted position error signal based on a position error signal and an estimated microactuator position signal. The servo controller is also configured to filter the adjusted position error signal with a shaping filter to generate a filtered position error signal, and to provide sliding mode control of the coarse actuator based at least partially on the filtered position error signal.

The invention relates to a roll-packed multifunctional combination die-cutting machine, which includes a frame, an unwinding mechanism, a high-frequency shaping mechanism, a bronzing printing machine, a beer cutting mechanism, a material receiving mechanism and a winding mechanism, and a conveyor belt is arranged on the frame , the unwinding mechanism unwinds the substrate, the high-frequency shaping mechanism shapes the substrate to form a predetermined shape on the substrate, the bronzing printing machine performs bronzing printing on the substrate, and the beer cutting mechanism along the substrate The formed predetermined shape of the pressure line beer is cut, and the finished product of the predetermined shape is obtained. The finished product moves along the conveyor belt and is collected by the material receiving mechanism. The waste after beer cutting is reeled by the rewinding mechanism. , Reduce the number of handovers between processes, saving manpower and material resources. The high-frequency shaping mechanism can achieve rapid production, and the softness of the crimping line is better.

The invention relates to a method for post-processing, in an audio decoder, a signal reconstructed by the temporal and frequential shaping (805, 807) of an excitation signal obtained on the basis of at least one parameter in a first frequency band, said temporal and frequential shaping being carried out at least on the basis of a temporal envelope and a frequential envelope received and decoded (801, 802) in a second frequency band. The method is such that, once the shaping (805,807) has been carried out, steps of comparing the amplitude of the reconstructed signal with the received and decoded temporal envelope (s) are followed, and an amplitude compression is applied to the reconstructed signal if at least one threshold of the temporal envelope is exceeded. The invention relates to a post-processing module for implementing the inventive method, and to an audio decoder. It is used for transmitting and storing digital signals such as audiofrequency signals: speech, music, etc.

The invention discloses a vehicle motion planning system and method using frequency shaping, and the method comprises the steps: obtaining the information of a passable region around a vehicle and the limit of a vehicle motion state based on an upper-layer sensing module and a vehicle information module, and combining a planning target demand obtained by a planning target setting module, the input planning constraint generation module determines a geometric position constraint and a motion state constraint of the vehicle; based on the vehicle motion pose and geometric information output by the geometric position constraint and vehicle information module, the planning end point sampling module outputs a plurality of planning end points; a frequency weighting function and an optimization objective function of an optimal control problem are obtained in combination with a planning objective characterization index; and finally, the optimization solving module outputs optimal control sequences and optimal planning time domains corresponding to different planning end points, and a target trajectory is output through selection of the optimal path selection module. According to the method, different planning targets are individually selected through the planning target setting module, so that the comfort of motion planning can be improved.