367 results about "Signal restoration" patented technology

An implantable medical device communication system communicates information between an implantable medical device and at least one slave device by way of a two-wire bus. Slave devices may include remote sensors and other implantable medical devices. The implantable medical device includes a communication unit to combine data and power for transmission over the two wire bus. The transmitted signal is selectively changeable between a first and second voltage. The slave device includes a recovery unit to recover data and power from the received signal. An extendable command set includes long commands to set up the system and shorter commands to conserve power. Selectively addressable multicast commands, and shortened quick trigger commands conserve power by lowering system current and increasing data throughput.

A method for editing data in a mobile terminal configured to conveniently change a symbol and a mobile terminal using the method for editing data are disclosed, wherein the method includes displaying an inputted data on a touch screen, displaying on the touch screen a progress bar including a handler if a progress bar display signal is inputted, generating an undo signal or a redo signal based on a drag direction by touching the handler, and deleting the data in response to the undo signal, or reinstate the data in response to the redo signal.

Apparatus and method which integrates and automates AV system to control peripheral devices with one remote control including wireless bridge connected to peripheral devices through a network and a host device which receives a remote control input of a user, transmits a control signal to wireless bridge wirelessly, receives a video and an audio from the wireless bridge wirelessly, and displays received video and audio to user. A video device includes a wireless bridge transmitting a control signal for controlling a peripheral device to the peripheral device through a communication cable, receiving a response signal for the control signal from the peripheral device and receiving an AV signal from the peripheral device through an AV cable according to the control signal, and a host device for wirelessly receiving the inputted AV signal from the wireless bridge and displaying a video or an audio restored from the AV signal to user.

The recently introduced theory of Compressive Sensing (CS) enables a new method for signal recovery from incomplete information (a reduced set of “compressive” linear measurements), based on the assumption that the signal is sparse in some dictionary. Such compressive measurement schemes are desirable in practice for reducing the costs of signal acquisition, storage, and processing. However, the current CS framework considers only a certain task (signal recovery) and only in a certain model setting (sparsity).We show that compressive measurements are in fact information scalable, allowing one to answer a broad spectrum of questions about a signal when provided only with a reduced set of compressive measurements. These questions range from complete signal recovery at one extreme down to a simple binary detection decision at the other. (Questions in between include, for example, estimation and classification.) We provide techniques such as a “compressive matched filter” for answering several of these questions given the available measurements, often without needing to first reconstruct the signal. In many cases, these techniques can succeed with far fewer measurements than would be required for full signal recovery, and such techniques can also be computationally more efficient. Based on additional mathematical insight, we discuss information scalable algorithms in several model settings, including sparsity (as in CS), but also in parametric or manifold-based settings and in model-free settings for generic statements of detection, classification, and estimation problems.

Methods and apparatus are provided for identifying coordinates of a touch area on a touch screen panel based on a capacitive scheme. The touch screen panel has a first electrode layer having first electrode lines aligned in a first direction and a second electrode layer having second electrode lines aligned in a second direction. A signal generation unit generates a spread spectrum signal and supplies the spread spectrum signal to the first electrode layer. A signal restoration unit processes a band restoration for a signal input from the second electrode layer. A touch area coordinate identification unit identifies the coordinates of the touch area on the touch screen panel from a signal input from the signal restoration unit.

A method of recovering a most likely value of each symbol transmitted through an optical communications network using a high speed optical signal. A stream of multi-bit digital samples of the optical signal is processed to generate a respective multi-bit estimate X′(n) of each transmitted symbol. A first function is applied to each symbol estimate X′(n) to generate a corresponding soft decision value {tilde over (X)}(n). Each soft decision value {tilde over (X)}(n) is processed to generate a corresponding hard decision value. {circumflex over (X)}(n) having an ideal amplitude and phase. A plurality of successive soft decision values and hard decision values are processed to determine a second function, which is applied to each soft decision value {tilde over (X)}(n) to generate a most likely symbol value {circumflex over ({circumflex over (X)}(n).

An apparatus includes a DSL transceiver configured to transit to a DSL wait state in which a power transmitted from the DSL transceiver to a local-end line is substantially reduced in response to an interruption or substantial stop at the DSL transceiver of reception of DSL communications from the local-end line. The DSL transceiver is configured to transmit to the local-end line a DSL acknowledge signal in response to receiving from the local-end line a DSL wait signal. The DSL transceiver is configured to resume to transmit DSL communications to the local-end line at a power substantially higher than the power transmitted thereto in the DSL wait state in response either to receiving from the local-end line DSL transmissions at a substantially higher power than received there from in the DSL wait state or to receiving from the local-end line a second DSL acknowledge signal.

An amplifier system is provided that switches between operation in a polar mode and a signal restoration mode based on a characteristic of an input signal relative to a threshold level. The system includes a correction path that mitigates distortion and out-of-band (OOB) emissions in the polar mode and provides at least a substantial portion of the amplified output signal in the signal restoration.

A method and apparatus for 2× oversampling of data having jitter. In some embodiments, the invention is a clock and data recovery device including an alternating edge sampling binary phase detector, and which is configured to stabilize loop characteristics in various jitter environments and can be implemented with small hardware overhead. A transceiver that embodies the invention can be implemented as a CMOS integrated circuit using a 0.18 μm CMOS process, with the transceiver chip being capable of recovering data having a data rate of up to 11.5 Gbps from a signal received over a serial link, while consuming no more than 540 mW from 1.8V supply, and with a bit error rate of less than 10−12.

A method and apparatus which encode multi-channel audio signals and a method and apparatus which decode multi-channel audio signals. When encoding, a downmixed audio signal, first additional information for restoring multi-channel audio signals from the downmixed audio signal, and second additional information representing characteristics of a residual signal are multiplexed. When decoding, restored multi-channel audio signals having a predetermined phase difference are combined using the second additional information, and an audio signal of each channel is corrected, in order to improve quality of the restored audio signals.

An architecture for nanoscale electronics is disclosed. The architecture comprises arrays of crossed nanoscale wires having selectively programmable crosspoints. Nanoscale wires of one array are shared by other arrays, thus providing signal propagation between the arrays. Nanoscale signal restoration elements are also provided, allowing an output of a first array to be used as an input to a second array. Signal restoration occurs without routing of the signal to non-nanoscale wires.

A system and method for supplying power to a headset, and for transmitting multiple signals generated in the headset to a terminal using frequency division multiplexing. An audio signal and a carrier signal are generated in the terminal and summed together to form a composite uplink signal. The composite uplink signal is provided to a headset over a first physical channel. At the headset, the audio and carrier signals are separated, and the carrier signal is used to generate power in the headset. Signals generated by a plurality of acoustic sensors in the headset are combined using frequency division multiplexing to generate a composite downlink signal, which is transmitted to the terminal over a second physical channel. One or more carrier signals used to generate the composite downlink signal are provided by either a carrier source in the headset, or by recovering the carrier signal from the composite uplink signal.

A communications system that uses electromagnetic waves. The communications system preferably operates in the millimeter-wave frequencies, and provides relatively high signal restoration and isolation. The communications system can use polarization diversity to increase the capacity of a channel. Isolation and restoration features in the transceivers eliminate or reduce the effects of precipitation and / or reflection and diffraction from objects, and thus is well-suited for an urban environment.The transceiver will select the proper antenna and signal path for optimal information throughput as the conditions in the propagation medium of the network vary.

The system for recovering symbol timing offset and carrier frequency error from an orthogonal frequency division multiplexed (OFDM) signal includes a receiver circuit for receiving an OFDM modulated signal representing a series of OFDM symbols, and providing a received signal to an output thereof. A peak development circuit is included for developing a signal having a plurality of signal peaks representing symbol boundary positions for each received OFDM symbol, where each of the signal peaks is developed responsive to an amplitude and phase correspondence produced between the leading and trailing portions of each of the received OFDM symbols. The system includes a circuit for enhancing the signal peak detectability, which includes a circuit for additively superimposing and then filtering the signal peaks, to produce an enhanced signal peak having an improved signal-to-noise ratio. A circuit for establishing a temporal position indicative of the symbol boundary position from at least one of the enhanced signal peaks output from the signal enhancing module is also provided. Further, a circuit for recovering the received OFDM signal carrier frequency error corresponding to the temporal position is included.

An amplifier system is provided that switches between operation in a polar mode and a signal restoration mode based on a characteristic of an input signal relative to a threshold level. The system includes a correction path that mitigates distortion and out-of-band (OOB) emissions in the polar mode and provides at least a substantial portion of the amplified output signal in the signal restoration.

The invention discloses a broadband cognitive radio frequency spectrum detection method based on parallelly compressed sensing. The realization process is as follows: using each parallel subcircuit of a frequency spectrum detector to carry out independent compressed sensing on received signals to obtain a group of random sampling points of each subcircuit; using single restoration algorithm to reconstruct original signals and frequency domain signals thereof in the obtained sampling points; carrying out wavelet transformation on the reconstructed frequency domain signals to obtain a group of wavelet transformation coefficients; calculating the mean square error between the reconstructed original signals of each subcircuit and the received signals; multiplying the wavelet transformation coefficients of two subcircuits with the minimum mean square error and taking the maximum value to obtain the position of each sub-band, and taking the reconstructed frequency domain signal of the subcircuit with the minimum mean square error as the reconstructed frequency domain signal for final output to finish the detection of the cognitive radio frequency spectrum. The invention can reduce noiseand the influence of randomness of the sampling points, thus improving the probability of correct detection.

Channel Equalization of a digital TV is disclosed. In channel equalization for restoring an original signal from a digital TV reception signal having passed through a channel, the present invention includes estimating an impulse response of the channel from a received signal having passed through the channel using conjugate-gradient algorithm, finding an equalizer coefficient in a frequency domain using the estimated impulse response of the channel, outputting a signal equalized by multiplying a signal resulting from transforming the received signal into the frequency domain by the found equalizer coefficient, and predicting to remove an amplified noise of the equalized signal using the conjugate-gradient algorithm in a time domain. Accordingly, the variation of the channel impulse response according to time can be tracked in the dynamic channel having fast channel variation as well as the static channel, whereby equalizing performance can be enhanced.

The invention discloses a seismic signal restoration algorithm based on tensor nuclear norm regularization. The method comprises the following steps: S1, constructing an objective function based on Hankel tensor nuclear norm regularization; and S2, solving the objective function by using an ADMM algorithm. According to characteristics of correlation, redundancy and low rank of the pre-stack seismic signal, the invention provides a Hankel tensor nuclear norm regularization method to reconstruct missing seismic data. With a HTR-SVD decomposition method, a Hankel matrix construction mode is applied to a tensor nuclear norm, so that the correlation of a tensor data block is increased, the low-rank performance of the tensor data block is improved, and a problem that a pre-stack seismic signal can not be restored because of lack of a tangent plane is solved; and thus work area data selected randomly can be processed by the method, so that the the robustness and adaptability of processing themissing seismic data are improved. While filling of missing data is carried out, noises in signals are suppressed, so that the signal to noise ratio of the signals is increased.

In a wavelet transform section, wavelet-transform coefficient signals are obtained by two-dimensional wavelet transformation, employing a low-pass filter which has a characteristic that its response at a frequency greater than a spatial frequency corresponding to grid pitch is approximately zero. Based on the direction of the grid judged by a direction judging section, a suppressing section applies one-dimensional wavelet transformation to a signal containing a grid component (when a vertical grid is used, signal HL1), in the grid direction. Then, a low frequency transform coefficient signal of the transform coefficient signals is made zero. The signal, made zero, and the remaining signals, are subjected to inverse one-dimensional wavelet transformation. In an inverse wavelet transform section, the original image is restored with a signal having a suppressed grid component.

Method and apparatus for detecting a movement, such as two or more periodic vibrations, of a target, by sending a radar signal, e.g., near 60 GHz, at the target and processing the signal reflected by the target. One or more components of the movement can have a predominant frequency, such as a frequency of vibration, and two or more components can have different frequencies and, optionally, different magnitudes. A quadrature receiver processes the received signal to produce a base band output signal having in-phase (I) and quadrature-phase (Q) outputs. The in-phase (I) and quadrature-phase (Q) outputs are cross-referenced and real target movement frequency recovered directly in the time domain. System nonlinearity, which does not occur simultaneously on the I and Q channels, is identified and removed. Radar signals having wavelengths near one or more of the target movement magnitudes can be used.

The invention discloses a UHF RFID label reader-writer, which consists of a control module, a transmission module, a receiving module and a base band processing module. The transmission module is controlled by the control module to provide a carrier signal, process the carrier signal and output the carrier signal to an electronic label. Meanwhile, the invention receives the reflecting signal fed back by the electronic signal and inputs the reflecting signal into the receiving module; the receiving module conducts variable frequency modulation of the reflecting signal fed back by the electronic label under a zero intermediate frequency, so as to realize two-way orthogonal decoding and output two-way base band signal; the base band processing module processes the two-way base band signal and acquires an effective signal that can be processed by the control module; at the same time, the control module receives and processes a two-way low frequency signal and resumes the signal into the original information of the electronic label.

The invention discloses a terminal device, comprising: an information obtaining module of geographical position, used for obtaining the information of the current geographical position; a type judging module of network signal failure, used for obtaining the failure information of the current network signal and ensuring the type of the current network signal failure according to the failure information; a reporting judging module of network signal failure, used for ensuring whether to report the network signal failure to a server according to the information of the current geographical position and generating the information of the network signal failure according to the information of the current geographical position and the type of the current network signal failure when reporting is ensured; a reporting module of network signal failure formation, used for reporting the information of the network signal failure to the server when the current network signal returns to normal. The invention also discloses a method for reporting network failure, a server, as well as a control method and communication system for reporting network failure. The application of the invention can improve the reliability of reporting network failure.

Disclosed is a method and an apparatus for correcting a color imbalance of visible light in wavelength division parallel visible light communications. The method includes the steps of: inverting an original signal including information by a visible light communication transmitter; transmitting the original signal including the information and an inverted signal from the visible light communication transmitter to a visible light communication receiver, receiving the original signal including the information and the inverted signal by the visible light communication receiver, reinverting the inverted signal among the received signals by the visible light communication receiver, restoring the inverted signal back to its state prior to the inversion by reinverting the inverted signal by the visible light communication receiver, and performing a diversity combination on the original signal and a restored signal.

The invention relates to a FiberBragg grating(FBG) signal self-adapting restoration method based on compressed sensing, and belongs to a signal restoration technology field of an optical fiber sensing system. The FBG signal self-adapting restoration method comprises steps that step 1: EMD combination mutual information is used for self-adapting denoising processing of spectral signals; step 2, segmented testing of a denoising signal is carried out, and the signal is divided into k segments, and sample databases corresponding to the signals are acquired by calculating Euclidean distances among various segments of signals and samples, and self-adapting dictionaries D corresponding to the signals are acquired by adopting a K-SVD dictionary learning method; step 3, measured signals are used to acquire observation matrixes R and observation signals xi; step 4, the observation signals are reconstructed by adopting an improved regularized orthogonal matching pursuit algorithm to acquire complete reconstructed signals. The FBG signal self-adapting restoration method is advantageous in that problems such as interferences of noises on the signals, targeted dictionary learning, and the signal self-adapting reconstruction are considered, and each part represents the self-adaptability of the algorithm, and can be flexibly used in practical engineering, and then influences caused by manual misoperation are reduced.

The invention discloses a non-coherent radio interference suppression method of a wind profile radar, belonging to the signal processing and detection technical field. The method comprises the following steps: an interpulse pseudo random sequence and an intrapulse pseudo random sequence are generated at a transmitting end; coding processing is completed; then, modulation transmitting is completed and both pseudo random sequences are stored in a received signal processor; finally, receiving is completed at a receiving end and two times of decoding processing of the received signal is completed; thus, the processing procedure of the method is completed. The primary decoding operation of the received signal of a wind profile radar processed by the method is carried out through the interpulse pseudo random sequence synchronical to a transmitting modulation pulse, thereby restoring coherent wind measurement signal and converting non-coherent radio interference into white noise so as to reach the effect of reducing the power spectrum of radio interference signal; then, according to an intrapulse pseudo random codebook sequence, secondary decoding operation is carried out to reach the effect of increasing the power of wind signal; moreover, the interference suppression effect of the method is about (10log L)dB and the power of wind signal is increased about (20log P)dB.

The invention belongs to the technical field of wireless communications, and particularly relates to a method for reconstructing signals in an ultra-wide-band communication system by the adoption of a low-complexity improved Bayes compressed sensing algorithm. The method comprises the steps that firstly, sectioning and filtering are conducted on received signals, then a measuring matrix is used for conducting linear combination on the filtered signals again, after a series of relatively simple iterative operations, the expansion coefficient of original signals under the characteristic base can be measured, and therefore reconstruction of the original signals is realized. According to the method for reconstructing the signals, on one hand, the Bayes compressed sensing algorithm is improved by fully utilizing the characteristics of the characteristic base, the restorability is improved, more importantly, the complex matrix inversion process in the Bayes compressed sensing algorithm is avoided, and particularly, when the length of the signals is large and the order of the matrix is large, the signal restoration operation complexity can be effectively lowered.