17447 results about "Time delays" patented technology

Apparatus and methods are disclosed for detecting anomalies in microwave penetrable material that may be used for locating plastic mines or pipes underneath the ground. A transmitter is positioned at a plurality of different positions above the ground. A microwave signal is transmitted that is stepped over a plurality of frequencies. At each position, a plurality of reflections are received corresponding to each of the plurality of frequencies that were transmitted. A complex target vector may be produced at each position that contains complex values corresponding to magnitude, phase, and time delay for each of the plurality of reflections received at that location. A complex reference data vector may be produced, either based on predetermined values or based on data from the received plurality of reflections. A comparison is made between the complex target vector and the complex reference data vector to produce a channel vector. In one embodiment, an operator may be applied to the channel vector such as a complex filter matrix or to add a complex conjugate. A response signal is produced and anomalies are detected by variations in the response signal with respect to the plurality of positions.

A system for detecting a computer worm comprises a traffic analysis device in communication with a network device. The traffic analysis device can analyze network traffic received over a communication network and duplicate at least select network communications within the network traffic having characteristics associated with one or more computer worms. The network device comprises a controller in communication with one or more virtual machines that are configured to receive the duplicated network communications from the traffic analysis device. The network device may (i) monitor a behavior of a first virtual machine of the one or more virtual machines in response to processing of the duplicated network communications within the first virtual machine, (ii) identify an anomalous behavior as an unexpected occurrence in the monitored behavior, and (iii) determine, based on the identified anomalous behavior, the presence of the one or more computer worms in the duplicated network communications.

The invention provides a method and apparatus for re-ordering data traffic units, such as IP data packets, that may have been miss-ordered during a transmission over a multi-pathway link between a source node and a destination node in a network. The re-ordering apparatus includes a storage medium for intercepting the IP data packets and holding the IP data packets to allow IP data packets delayed on slower pathways to catch-up. The IP data packets in the storage medium are re-ordered based on their sequence number in an attempt to restore the original order of the IP data packets. A maximal time delay variable determines how long a certain IP data packet can be held in the storage medium. The TP data packet is released prior to the maximal time delay variable or as the maximal time delay variable is exceeded.

The present invention pertains to a wireless audio-video doorbell monitoring system, wherein a portable monitoring device administrates a doorbell device and detective devices. After initiation, the monitoring device calls other nearby devices to form a wireless network via a wireless broadcasting way, and then the monitoring device administrates each device to perform the doorbell or detection function. Via the automatic setup and simple operating interface, the present invention enables a general family to be free from a complex operational procedure. In the present invention, the detective device can sense the image and sound of the monitored regions, which is sent to a display panel and a speaker of the monitoring device without a time lag. Accordingly, the present invention provides an instantaneously-displaying and easy-operated wireless audio-video doorbell monitoring system, which is easy installed, automatically set up, highly securing, able to reduce the power consumption efficiently and suitable for a general family usage.

Disclosed herein is a dielectric resonator array antenna including one or more series-feed type array elements installed to be arranged in parallel in a multilayer substrate, wherein first high frequency signals having the same or different phases or time delays are adjusted to be applied to the respective series-feed type array elements and respective radiated 1D array beams are individually used or combined to adjust beamforming of 2D array beams. Also, since the series-feed type array element is configured by connecting a plurality of dielectric resonator antennas in series, it can be easily and simply fed in series through coupling generated by the intervals between the feeding lines of the pertinent feeding unit of the plurality of dielectric resonator antennas connected in series. In addition, the broadband characteristics can be obtained by using the plurality of dielectric resonator antennas, whereby the overall antenna performance can be enhanced.

Local oscillator circuitry for an antenna array is disclosed. The circuitry includes an array of rotary traveling wave oscillators which are arranged in a pattern over an area and coupled so as to make them coherent. This provides for a set of phase synchronous local oscillators distributed over a large area. The array also includes a plurality of phase shifters each of which is connected to one of the rotary oscillators to provide a phase shifted local oscillator for the array. The phase shifter optionally includes a cycle counter that is configured to count cycles of the rotary oscillator to which it is connected and control circuitry that is then operative to provide a shifted rotary oscillator output based on the count from the cycle counter. A system and method for operating a true-time delay phased array antenna system. The system includes a plurality of antenna element circuits for driving or receiving an rf signal from the elements of the array. Each element circuit has a transmit and a receive path and a local multiphase oscillator, such as a rotary traveling wave oscillator. Each path has an analog delay line for providing a true-time delay for the antenna element. Preferably, the analog delay line is a charge coupled device whose control nodes are connected to phases of the local multiphase oscillator to implement a delay that is an integer number local multiphase oscillator periods. A fractional delay is also included in the path by using a sample and hold circuit connected to a particular phase of the oscillator. By delaying each antenna element by a true time delay, broadband operation of the array is possible.

A method and related apparatuses for data transmission between a host computer and one or a plurality of USB compliant peripheral devices over a data communications network is provided which operates in the presence of transmission delays greater than that normally allowed in the USB specification. The host computer is connected to a local extender device which, in turn, is connected to one or a plurality of remote extender devices through the data communications network. The remote extender devices are, in turn, connected to a plurality of conventional USB peripheral devices. Data between the host computer and peripheral devices is stored and processed in the local and remote extender devices in order to allow the host computer and the USB peripheral devices to operate with greater than normally allowed time delays. In particular, the invention is of most utility when the round-trip transmission delay between the host computer and the USB peripheral device exceeds 1 microsecond.

A computer memory system provides a double data rate (DDR) memory output while requiring memory chips with only half the frequency limit of the prior art DDR memory chips. The system contains a first memory bank having data lines and a second memory bank having data lines. The first and second memory banks are associated with first and second clock signals, respectively, where the second clock signal is delayed from the first clock signal such that the data lines of the first memory bank are connected to a data bus in synchronism with the first clock signal while the data lines of the second memory bank are connected with the data bus in synchronism with the second clock signal. In one embodiment, a first FET switch connects the data lines of the first memory bank with the data bus and a second FET switch connects the data lines of the second memory bank with the data bus. The second FET switch is connected to the data bus at a time delayed from the beginning after the start of each clock cycle of the second clock signal. As a result, the data bus is never connected to the data lines of both memory banks at the same time, but rather, the data bus is alternately connected with the first memory bank and then the second memory bank.

A proximity switch assembly and method for detecting activation of the proximity switch assembly is provided. The assembly includes a plurality of proximity switches each providing a sense activation field and control circuitry processing the activation field of each proximity switch to sense activation. The control circuitry monitors the signal responsive to the activation field, determines a rate of change in signal amplitude for each signal, and generates an adaptive time delay based on the control circuitry. The control circuitry further detects a peak amplitude of the signal and determines activation of the switch after expiration of the time delay following the peak amplitude detection.

In general, this disclosure describes techniques of determining a backset for client devices attempting to download data of a live transmission. A backset is an amount of temporal delay that the client devices are delayed by when viewing the live transmission. As described herein, a media content provider may determine a recommended backset for each client devices based characteristics of the client device. Each client device may then be backset by the determined value, or may calculate its own backset based on the recommended backset. Establishing a backset for each client device may avoid rebuffering of live transmission data.

A digital distributed antenna system (DDAS) that regains the capability to perform simulcast to multiple simulcast groups while using a base station's direct digital output is provided. The User Plane data is adapted for simulcast and also for eliminating time delay ambiguities across multiple simulcast digital radios. In addition, the Control and Management Plane is aggregated across multiple remote units to allow a non-modified donor digital base station to control simulcast groups. The result is a low cost digital DAS that can efficiently distribute the capacity of a digital base station to solve coverage and capacity requirements in a manner similar to that now accomplished using a traditional base station with RF in / out.

A Time Division Duplexed (TDD) digital distributed antenna system (DDAS) that performs simulcast distribution to multiple simulcast groups while using TDD time advanced burst to negate the data rate reducing effects of transport delays. The User Plane data is adapted for eliminating time delay ambiguities across multiple simulcast digital radios. In addition, the Control and Management Plane is aggregated across multiple remote units to allow a non-modified donor digital base station to control simulcast groups.

The invention provides an LTE and WLAN interconnecting system and a switching method; and the system introduces the entity of a virtual base station under an LTE architecture, and accesses the entity into the interface of the LTE as WLAN. On the LTE side, the virtual base station remains transparent relative to the LTE side, and is provided with the functions of a general LTE base station. On the WLAN side, the virtual base station can control the WLAN access point. The switching between the LTE and the WLAN is realized through the virtual base station through a standard X2 interface. A second layer tunneling protocol or an Ethernet tunneling protocol is adopted between the virtual base station and the WLAN access point to realize the transmission and the receiving of data and signaling during the switching process, and the WLAN serves as the bottom layered transmission channel of the data and the signaling of an LTE system. The method has the advantage that for the LTE, the switching process is kept consistent with the LTE switching process, which has very small impact on the traditional LTE. The WLAN is connected with the LTE in a tight coupling way, thereby greatly meeting the business requirement requirements, reducing the time delay caused by system switching, and ensuring the system performance.

Retractable ball seats having a housing, a seat, and a plug such as a ball are disclosed. The seat has a retracted position that prohibits the ball from passing through the passageway and an expanded position that permits the ball to pass through the passageway. A time delay material, such as a dissolvable material, maintains the seat in the retracted position. The time delay material disintegrates, degrades, or dissolves within a known period of time such that the retractable ball seat can be placed in a desired location in the wellbore and the ball will be released through the passageway within a known period of time.

Techniques for location-assisted wireless communication use real-time location(s) of wireless transceiver(s) together with stored location-indexed channel information to improve communication over a wireless channel between the transceiver(s). The stored channel information includes channel characteristics (e.g., average power, angle-of-arrival, and time delay of multipath components) that are substantially constant in time but vary gradually as a function of location. Current transceiver location(s) are obtained and used to retrieve stored channel characteristics corresponding to the location(s). The channel information may be used at either or both transceiver(s) to improve reception and / or transmission of signals propagating over the wireless channel. For example, reception may be improved by using path angle information to perform spatially structured reception, or using path delay information to perform temporally structured reception, e.g., to assign fingers to multipath components in a RAKE receiver and / or to track time delays of multipath components.

A method and apparatus for orchestrating multiple fractures at multiple well locations in a region by flowing well treatment fluid from a centralized well treatment fluid center is disclosed that includes the steps of configuring a well treatment fluid center for fracturing multiple wells, inducing a fracture at a first well location, measuring effects of stress fields from the first fracture, determining a time delay based in part upon the measured stress effects, inducing a second fracture after the time delay at a second location based upon the measured effects, and measuring the stress effects of stress fields from the second fracture. Sensors disposed about the region are adapted to output effects of the stress fields. Location and orientation of subsequent fractures is based on the combined stress effects of the stress fields as a result of the prior fractures which provides for optimal region development.

The present invention provides a method and apparatus for curing a coated fiber, comprising either two fiber coating curing stages separated by a cooling stage, or two fiber coating curing stages separated by a distinct time interval, or both. One of the two fiber coating curing stages responds to the coated fiber, and provides a partially cured fiber coating. The other of the two fiber coating curing stages responds to the partially cured coated fiber for further curing the coating of the fiber. In one embodiment of the invention, a cooling stage is placed between the two curing stages, while in the other the curing stages are placed a set distance apart such that polymerization of the coating initiated by the first curing stage has time to complete prior to the coating being irradiated by the second curing stage. The cooling stage is used to actively remove heat generated during the cure process from the fiber coating, while the time delay is used to allow complete polymerization to occur before subsequent irradiations. These embodiments of the present invention can be used separately or in combination to achieve optimal fiber coating cure.

Retractable ball seats having a housing, a seat, and a plug such as a ball are disclosed. The seat has a retracted position that prohibits the ball from passing through the passageway and an expanded position that permits the ball to pass through the passageway. A time delay material, such as a dissolvable material, maintains the seat in the retracted position. The time delay material disintegrates, degrades, or dissolves within a known period of time such that the retractable ball seat can be placed in a desired location in the wellbore and the ball will be released through the passageway within a known period of time.

Detecting a linear impairment in a cable under test by using a random signal transmitted down the cable. The impairment causes a reflected signal to be combined with the random signal. The combined signal extends over a plurality of sub-bands. A method and apparatus perform the steps of: (a) receiving the combined signal from a test point upstream from the impairment; (b) tuning to each sub-band and receiving a part of the combined signal within each sub-band; (c) determining an autocorrelation function of each part of the combined signal of each sub-band, to produce a plurality of autocorrelation functions; (d) combining the autocorrelation functions to form a combined function; (e) detecting the reflected signal from the combined function; and (f) determining, from the combined function, a time delay associated with the reflected signal and the distance from the test point to the impairment.

A system and a method for distance measurement utilizes a radio system. The distance is measured by determining the time it takes a pulse train to travel from a first radio transceiver to a second radio transceiver and then from the second radio transceiver back to the first radio transceiver. The actual measurement is a two step process. In the first step, the distance is measured in coarse resolution, and in the second step, the distance is measured in fine resolution. A first pulse train is transmitted using a transmit time base from the first radio transceiver. The first pulse train is received at a second radio transceiver. The second radio transceiver synchronizes its time base with the first pulse train before transmitting a second pulse train back to the first radio transceiver, which then synchronizes a receive time base with the second pulse train. The time delay between the transmit time base and the receive time base can then be determined. The time delay indicates the total time of flight of the first and second pulse trains. The time delay comprises coarse and fine distance attributes. The coarse distance between the first and second radio transceivers is determined. The coarse distance represents the distance between the first and second radio transceivers in coarse resolution. An in phase (I) signal and a quadrature (Q) signal are produced from the time delay to determine the fine distance attribute. The fine distance indicates the distance between the first and second transceivers in fine resolution. The distance between the first and second radio transceivers is then determined from the coarse distance and the fine distance attributes.

Flow rate measurement system includes two measurement regions 14,16 located an average axial distance ΔX apart along the pipe 12, the first measurement region 14 having two unsteady pressure sensors 18,20, located a distance X1 apart, and the second measurement region 16, having two other unsteady pressure sensors 22,24, located a distance X2 apart, each capable of measuring the unsteady pressure in the pipe 12. Signals from each pair of pressure sensors 18,20 and 22,24 are differenced by summers 44,54, respectively, to form spatial wavelength filters 33,35, respectively. Each spatial filter 33,35 filters out acoustic pressure disturbances Pacoustic and other long wavelength pressure disturbances in the pipe 12 and passes short-wavelength low-frequency vortical pressure disturbances Pvortical associated with the vortical flow field 15. The spatial filters 33,35 provide signals Pas1,Pas2 to band pass filters 46,56 that filter out high frequency signals. The Pvortical -dominated filtered signals Pasf1,Pasf2 from the two regions 14,16 are cross-correlated by Cross-Correlation Logic 50 to determine a time delay τ between the two sensing locations 14,16 which is divided into the distance ΔX to obtain a convection velocity Uc(t) that is related to an average flow rate of the fluid (i.e., one or more liquids and / or gases) flowing in the pipe 12. The invention may also be configured to detect the velocity of any desired inhomogeneous pressure field in the flow. The invention may also be combined with an instrument, an opto-electronic converter and a controller in an industrial process control system.

An apparatus and a method for Envelope Tracking (ET) power amplification in a wireless communication system are provided. The apparatus includes a baseband signal controller for outputting an envelope signal in an envelope signal path and outputting a constant signal in a baseband signal path when measuring a time delay of the envelope signal path, and for outputting a constant signal in the envelope signal path and outputting a baseband signal in the baseband signal path when measuring a time delay of the baseband signal path, a time delay difference measurer for measuring a time delay of each path by calculating a correlation coefficient between the envelope signal path and the baseband signal path and a signal time controller for setting a time delay in a corresponding path using the time delay difference of each path and aligning times.

A protection circuit for a boost power converter provides input under-voltage protection and output over-voltage and over-current protection. The protection circuit includes a control power MOSFET connected in series between the ground of the boost power converter and the ground of the load. The arrangement of the circuit makes it easy to drive the gate of an N-channel power MOSFET and is ideal for current-limiting control, which utilizes the Rds-on of the MOSFET as a current sensing element. Neither a specific gate-driver nor a current sensing resistor is required, and thus high efficiency can be achieved. Furthermore, the slow slew-rate at the gate of the MOSFET provides a soft-start to the load. The protection circuit includes a temperature compensation circuitry to offset the variation of the Rds-on. A time delay circuit prevents the switching elements and protection elements from overload damage.

Some embodiments of the present invention include determining if updates performed by a second user include a systematic change such as a reversal of an update previously performed by a first user within a time window. The reversal is associated with a record of data used by a gamification application executing in a computer system. A time delay is introduced between the update performed by the second user and rewarding the second user if the update performed by the second user includes the reversal within the time window. An update history of the first user and the second user is evaluated to identify pattern of reversals associated with similar records within the time window. The second user is prevented from being rewarded based on identifying that there are patterns of reversals from the update history occurring within the time window.

An AC controller provides programmable switching of AC power flow, together with producing a source of DC power for the AC controller. The AC controller is connected in series with only one side of the AC power source and the AC load, and uses a microcontroller or a Programmable Logic Device (PLD) for the programmable capability. The AC controller can be programmed to provide a light flasher function, a time delay off function, an automatic fade function, a dimming function, a burglar deterrent function, and a time delay dim function. With a multiple-position switch replacing a current wall switch, the operator can easily select many pre-programmed functions.

A method and an apparatus to reproduce a multi-channel audio signal, in which mixing of a center channel signal is performed with a center channel signal in a home theater system. The method of reproducing a multi-channel audio signal includes calculating a delay value of a center channel signal according to location relationships of a listener, a center channel speaker and other channel speakers, regulating a time delay of the center channel signal according to the calculated delay value, and mixing the time-delay regulated center channel signal with other channel signals.

A collaboration scheme for wireless communications devices implemented on a single CMOS integrated circuit is described. By providing a dynamically updateable, multiple-priority protocol, more differentiation between traffic types is provided and response time (latency) is reduced by adjusting the priority allocations between the devices when an application on one device requires greater throughput.

An impulse radio communications system using one or more subcarriers to communicate information from an impulse radio transmitter to an impulse radio receiver. The impulse radio communication system is an ultrawide-band time domain system. The use of subcarriers provides impulse radio transmissions added channelization, smoothing and fidelity. Subcarriers of different frequencies or waveforms can be used to add channelization of impulse radio signals. Thus, an impulse radio link can communicate many independent channels simultaneously by employing different subcarriers for each channel. The impulse radio uses modulated subcarrier(s) for time positioning a periodic timing signal or a coded timing signal. Alternatively, the coded timing signal can be summed or mixed with the modulated subcarrier(s) and the resultant signal is used to time modulate the periodic timing signal. Direct digital modulation of data is another form of subcarrier modulation for impulse radio signals. Direct digital modulation can be used alone to time modulate the periodic timing signal or the direct digitally modulated the periodic timing signal can be further modulated with one or more modulated subcarrier signals. Linearization of a time modulator permits the impulse radio transmitter and receiver to generate time delays having the necessary accuracy for impulse radio communications.

The invention discloses a method of periodic Channel Quality Indicator (CQI) feedback under carrier polymerization, comprising: according to a preset sequencing rule, a user end (UE) successively traverses all BP from partial bandwidth (BP) assembly in a downlink weighting carrier, and simultaneously feeds back a plurality of sub-band CQI by adopting a combined feedback method according to the optimum sub-band CQI in each traversed BP to build a CQI report to be fed back to a base station. The invention also discloses a device of periodic CQI feedback under carrier polymerization. The method and the device of periodic CQI feedback under carrier polymerization can reduce downlink schedule time delay during periodic CQI feedback and improve CQI feedback speed and efficiency. The invention also discloses a method for reducing schedule blockage during periodic CQI feedback under carrier polymerization, namely random processing is carried out on the priority level of each weighting carrierwhen UE feeds back the sub-band CQI.

Control methods for resonant converters offer improved performance in resonant converters that operate with a wide input-voltage range or a wide output-voltage range (or both) by substantially reducing the switching-frequency range. Reduction in the switching frequency range is achieved by controlling the output voltage with a combination of variable-frequency control and time-delay control. Variable-frequency control may be used to control the primary switches of an isolated resonant converter, while delay-time control may be used to control secondary-side rectifier switches provided in place of diode rectifiers. The secondary-side control may be implemented by sensing the secondary current or the primary current (or both) and by delaying the turning-off of the corresponding secondary switch with respect to the zero crossings in the secondary current or the primary current.