783 results about "Sequence signal" patented technology

A light emission drive circuit includes an electric charge accumulating section for accumulating electric charges on the basis of a gradation sequence signal designating a luminance gradation sequence. A light emission control section flows a light emission drive current having a current value in accordance with an amount of the electric charges accumulated in the electric charge accumulating section. A writing control section controls a supplying state of the electric charges based on the gradation sequence signal to the electric charge accumulating section on the basis of a first control signal. A voltage control section controls a drive voltage for operating the light emission controlling section on the basis of a second control signal.

A method and system for performing sequence time domain reflectometry over a communication channel to determine the location of line anomalies in the communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over an optical channel. The system receives one or more reflection signals over the optical channel and performs reflection signal processing on the reflection signal. In one embodiment, the optical reflection is transformed to an electrical signal and correlated with the original sequence signal to generate a correlated signal. The time between the start of the reflection signal and a subsequent point of correlation and the rate of propagation reveals a line anomaly location. In one or more embodiments sequence signal time domain reflectometry occurs during data transmission.

A data processing system includes a power control circuit, a processor, a power supply, and a plurality of other components. Upon system reset, the power control circuit can generate at least one sequencing signal indicating a first sequence in which power is to be supplied to the plurality of components. Similarly, power sequencing code executed by the processor upon system reset can selectively generate at least one sequencing signal indicating a second sequence in which power is to be supplied to the plurality of components. The power supply, which can receive both the sequencing signal generated by the power control circuit and the sequencing signal generated by the power sequencing code, supplies power to the plurality of components in the second sequence if the power supply receives the sequencing signal generated by the power sequencing code. In one embodiment, the plurality of components require a plurality of different power supply voltages.

A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over a channel that is the subject of the sequence time domain reflectometry analysis. The system monitors for and receives one or more reflections, collectively a reflection signal, and presents the reflection signal to a reflection processing module. The module also has access to the original sequence signal that was transmitted over the channel. Various methods of processing the reflection signal are available to determine the location of the line anomalies. In one embodiment, the reflection signal is correlated with the original sequence signal to generate a correlated signal. The system performs signal analysis on the correlated signal to determine a time value between the start of the reflection signal and the subsequent points of correlation. Based on the time value and the rate of propagation of the signals through the channel, the reflection processing module can determine a distance from the system to a line anomaly. In another embodiment, the original sequence signal is fed into a predictive filter and processed based on coefficient values of the predictive filter. The output of the predictive filter is compared to the reflection signal and the results of the comparison used to adjust the coefficients of the predictive filter. The reflection processing module adjusts the coefficients until the predictive filter output generally matches the reflection signal, at which point the coefficient values may be used to determine the distance from the system to a line anomaly.

A drive system comprises a rotor position and velocity tracker adapted to decouple fundamental frequency effects of a zero sequence signal of an induction machine from the zero sequence signal and to use a resulting error signal to estimate a position and a velocity of a rotor of the induction machine.

A method for testing a signal path for mark ratio tolerance includes generating a varying test pattern by selecting between a first pattern and a second pattern according to a defined sequence; and sending the varying test pattern over the signal path. An apparatus disposed in a communication system includes a selection circuit for generating a varying test pattern to send over the signal path, the selection circuit generating the varying test pattern by selecting between a first pattern and a second pattern according to a select sequence signal, and a sequencer coupled to the selection circuit, the sequencer providing the select sequence signal to the selection circuit, the sequencer generating the select sequence signal according to a mode value. The mark ratio tolerance of a system can be tested, varying the data density of one portion of the signal path while maintaining a constant data density on another portion of the signal path.

The invention discloses a self-adapting analog quadrature modulation unbalance compensating method and a device thereof. The device of the invention comprises a baseband signal module, a DPD module, a self-adapting analog quadrature modulation AQM compensator, a local oscillation (LO) and a RF transmission channel, and a feedback channel. The method of the invention comprises the steps that: an AQM compensation algorithm and a control unit are used for transmitting a training sequence signal to firstly judge whether a DAC is provided with quadrature modulation compensator QMC; then pre-distorted baseband si (t) and a sq (t) signal and baseband IB and a QB signal sent by a feedback loop are obtained, and then measured and compared; the particle swarm optimization (PSO) is applied to continuously adjusting the 6 compensating parameters until a target function reaches the global minimum; at last, a compensating parameter is applied to the QMC unit updated parameter to conduct a dynamic compensating process to the pre-distorted baseband si (t) and sq (t) signals, therefore, the AQM self-adapted unbalance compensation can be realized, and the performance of a broadband digital pre-distorted system is improved.

The invention discloses a radio-frequency micro-capacitance fingerprint acquisition chip and method. The chip comprises a plurality of reference sensing units, a two-dimensional sensing unit array formed by the reference sensing units, an insulating layer, an insulating substrate serving as a finger contact surface, a radio-frequency signal generation circuit, a radio-frequency drive electrode, a sensing unit array controller used for providing bias-power-supply switching signals for switching on or switching off the sensing units and charge-discharge sequence signals needed by the sensing units, an analog-digital conversion array, a digital-analog converter for controlling the gain of the analog-digital conversion array, a sensing unit offset correction circuit, a fingerprint image cache, a fingerprint image output controller and an image signal processor. Due to the improvement of the structure of the sensing units and the additional arrangement of the sensing unit offset correction circuit, the radio-frequency micro-capacitance fingerprint acquisition chip can solve the problems of fingerprint residual, interference caused by other radiofrequency radiation, false fingers and small detection depth; besides, the chip can be embedded into a capacitive touch screen.

The invention provides a liquid crystal display device which consists of a liquid crystal panel, a sequential control circuit, a common voltage generation circuit, a gamma circuit and a scan driving circuit, wherein, the liquid crystal panel comprises a plurality of thin film transistors, the scan driving circuit is used to control the conduction and closing of the thin film transistors; the sequential control circuit is used to generate a common circuit sequence signal and a gray-stage voltage sequence signal, the two sequence signals control the common voltage generation circuit and the gamma circuit respectively in order that the common voltage generated by the common voltage generation circuit can be transmitted to the liquid crystal panel and to become steady before the gray-staged voltage generated by the gamma circuit is transmitted to the liquid crystal panel when opening the liquid crystal display device, and that the gray-staged voltage and the common voltage reduce to 0V at the same time when a plurality of the thin film transistors are all conducted when closing the liquid crystal display device.

A bus buffer conditions and amplifies bi-directional electrical signals on a line carrying MIL-STD 1553 bi-polar signals. The device includes a receiver with a threshold detector, a signal conditioner including a retiming circuit and an amplifying transmitter. The signal conditioner receives filtered bi-polar signal output from the receiver and transforms the signal into separate uni-polar digital outputs. The signal conditioner includes means for increasing the positive voltage state period of each uni-polar output voltage state until the beginning of the next output voltage state to eliminate an effective null bus period during a signal transmission. A timing circuit includes a clock and logic circuitry which retimes and combines the uni-polar signals to create a bi-polar digital output having retimed zero-crossing points which is then transmitted out to a second bus. Two bus buffers are connected between the first and second buses in reverse orientation to provide bidirectional capability. An arbitrator circuit sequences signals arriving at the device from both directions based on detection of a null bus period at either bus.

A method and system for performing sequence time domain reflectometry over a communication channel to determine the location of line anomalies in the communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over an optical channel. The system receives one or more reflection signals over the optical channel and performs reflection signal processing on the reflection signal. In one embodiment, the optical reflection is transformed to an electrical signal and correlated with the original sequence signal to generate a correlated signal. The time between the start of the reflection signal and a subsequent point of correlation and the rate of propagation reveals a line anomaly location. A circulator, beam splitter, or any other similar device may direct the reflection signal to the apparatus configured to perform reflection signal processing.

The present invention discloses a monitoring diagnostic device of computer main-broad fault. It includes the following components: display unit for displaying running state of the described computer main board in the process of starting computer; first interface for obtaining electrically computer-starting time-sequence signal of computer main board from the computer main board; and signal processing unit for receiving the above-mentioned time-sequence signal and converting it into display unit drive signal to drive display unit.

A data transmission apparatus employing an orthogonal frequency division multiplex system. A receiver included therein analyzes a cross-correlation value sequence signal (CT) which has been acquired from the arithmetic operation of the correlation between a received signal and a predetermined symbol signal to detect an effective correlation peak in which the inter-symbol interference becomes minimum, and on the basis of the effective correlation peak thus detected, carries out the processing of synchronizing a reception sampling clock, and the control for the frame timing and the symbol timing of the receiver.

A method and system for performing sequence time domain reflectometry over a communication channel to determine the location of line anomalies in the communication channel is disclosed. In one embodiment, the system generates a sequence signal and transmits the sequence signal over an optical channel. The system receives one or more reflection signals over the optical channel and performs reflection signal processing on the reflection signal. In one embodiment, the optical reflection is transformed to an electrical signal and correlated with the original sequence signal to generate a correlated signal. The time between the start of the reflection signal and a subsequent point of correlation and the rate of propagation reveals a line anomaly location. A circulator, beam splitter, or any other similar device may direct the reflection signal to the apparatus configured to perform reflection signal processing.

The invention discloses a method for carrying out centralized power supply on a RACK system and belongs to the technology in the field of power supply of server cabinet systems. Two stages of power supply are adopted to supply power. A primary power supply adopts a mode that a plurality of power supply modules are connected in parallel to supply power, namely a mode that N+1 power supply modules are connected in parallel to carry out redundant power supply. The method realizes conversion from a 220V AC power supply to a 12V DC power supply. The 12V DC power supply is output to each server node in the RACK system; an onboard DC-DC secondary power supply on each server node converts the 12V power supply and provides 12V, 5V, 3.5V, 5VSB and -12V required by various server nodes and sequence signals of the on-off of PS-ON and PowerGood. Compared with the prior art, the method for carrying out centralized power supply on the RACK system greatly improves the reliability of a power supply system, realizes connection without cables and is convenient to maintain.

A system and method of signal processing for a hearing implant. The hearing implant includes at least one electrode, each electrode associated with a channel specific sampling sequence. An acoustic audio signal is processed to generate for each electrode a band pass signal representing an associated band of audio frequency. For each electrode, a sequence signal is determined as a function of the electrode's associated band pass signal and channel specific sampling sequence. An envelope of each band pass signal is determined. The envelope of each band pass signal is filtered to reduce modulations resulting from unresolved harmonics, creating for each electrode an associated filtered envelope signal. Each electrode's sequence signal is weighted based, at least in part, on the electrode's associated filtered envelope signal.

The invention belongs to the technical field of cosmetics, and particularly discloses a matrix with skin barrier repairing and anti-aging effects. The matrix is prepared from, by mass, 3-4% of 1,2-pentanediol, 10-15% of methyl propanediol, 1-2% of sodium hyaluronate, 3-5% of myrothamnus flabellifolia leaf/stem extracts, 10-15% of hydrolysis elastic protein, 10-20% of an anti-aging agent containing 100-200 ppm palmitoyl oligopeptide, 5-10% of tea extracts, 0.2-0.5% of a cell growth factor stock solution, 3-5% of an anti-aging agent containing 45-55 ppm neurotransmitter inhibition signal peptides, 5-10% of algae extracts and the balance water. According to the skin protection matrix, the skin barrier repairing and anti-aging effects are remarkable, the effect can be seen in a short period, and the skin barrier can be repaired when a user uses the matrix for a long time, so that wrinkles are reduced.

The invention discloses a GFSK baseband digital receiver and a baseband synchronization and demodulation method of the GFSK baseband digital receiver. The receiver comprises a phase difference detection module, a frequency shift estimation module, a frequency shift compensation module, a matched filtering module, a direct current component estimation and removing module, a selector and a synchronization and demodulation module. According to the receiver and the method, DFT operation of a specific frequency point is carried out on code element envelope signals output through phase difference detection; whether there are leader sequence signals or not is judged; moreover a corresponding frequency shift is calculated; frequency compensation and matched filtering are carried out on follow-up baseband signals; code element envelope is output through difference detection; and at this time, the direct current component estimation and removing module and the synchronization and demodulation module of the backward stage start working. The receiver is equipped with a frequency shift estimation and compensation circuit, thus improving the performance of the receiver; signal demodulation and code element judgment are carried out in a phase domain; the symbol synchronization and sampling clock synchronization of the receiver are realized based on a counter; and the receiver is simple and reliable in structure and can adapt to various different data rates.

The invention discloses an instant communication system, which comprises a sender and a receiver. Instant communication modules of the sender and the receiver carry out parameter setting on a controlcircuit, generate encrypted data for transmission, and decrypt the received data; a control circuit modulates a quantum key module, acquires an original key and controls a synchronous timing sequence;the quantum key module generates the original key synchronously according to a trigger signal, modulation voltage and a timing sequence signal of the control circuit; a clock synchronous module generates a synchronous clock signal according to the trigger signal of the corresponding control circuit, and sends the synchronous clock signal to the clock synchronous module of the receiver; the clocksynchronous module of the receiver returns the clock synchronous signal and completes the synchronization of the sender and the receiver; and the sender and the receiver encrypt and decrypt information by a real-time security key generated by a quantum key generation system according to an one-time pad memo-type encryption scheme; therefore, the instant communication system has high security, andcan realize the off-site absolutely-secure instant communication.

The method and system for multi-user channel estimation in a multi-access network comprises: providing a communication signal (r_i) providing an estimated communication signal Formula (I) generated using a spreading code signal (C_i), an information sequence signal (B_i) and a predicted composite channel impulse response signal Formula (II); comparing the communication signal (r_i) to the estimated communication signal Formula (I) to provide an error signal (ε_i); and generating an estimated composite channel impulse response signal Formula (III) using the error signal (ε_i), the spreading code signal (C_i) and the information sequence signal (B_i); the predicted composite channel impulse response signal Formula (II) providing the multi-user channel estimation. The proposed method, which is based on a LMS like algorithm, is an efficient and low complexity method allowing estimating and tracking even fast times varying multi-path channels. Instantaneously, the composite channel impulse response is computed and estimates of all possible path energies are computed to be used as an indicator of the significant paths (delays).

A system and method for transmitting a plurality of spread-spectrum signals over a communications channel having fading. The plurality of spread-spectrum signals are radiated by a plurality of antennas, with each antenna preferably spaced by one-quarter wavelength. A plurality of receiver antennas receive the plurality of spread-spectrum signals and a plurality of fading spread-spectrum signals. Each receiver antenna is coupled to a plurality of matched filters having a respective plurality of impulse responses matched to the chip-sequence signals of the plurality of spread-spectrum signals. A RAKE and space-diversity combiner combines, for each respective chip-sequence signal, a respective plurality of detected spread-spectrum signals and a respective multiplicity of detected-multipath-spread-spectrum signals, to generate a plurality of combined signals. The symbol amplitudes can be measured and erasure decoding employed to improve performance.