48 results about "Time gate" patented technology

A waveform adaptive transmitter that conditions and/or modulates the phase, frequency, bandwidth, amplitude and/or attenuation of ultra-wideband (UWB) pulses. The transmitter confines or band-limits UWB signals within spectral limits for use in communication, positioning, and/or radar applications. One embodiment comprises a low-level UWB source (e.g., an impulse generator or time-gated oscillator (fixed or voltage-controlled)), a waveform adapter (e.g., digital or analog filter, pulse shaper, and/or voltage variable attenuator), a power amplifier, and an antenna to radiate a band-limited and/or modulated UWB or wideband signals. In a special case where the oscillator has zero frequency and outputs a DC bias, a low-level impulse generator impulse-excites a bandpass filter to produce an UWB signal having an adjustable center frequency and desired bandwidth based on a characteristic of the filter. In another embodiment, a low-level impulse signal is approximated by a time-gated continuous-wave oscillator to produce an extremely wide bandwidth pulse with deterministic center frequency and bandwidth characteristics. The UWB signal may be modulated to carry multi-megabit per second digital data, or may be used in object detection or for ranging applications. Activation of the power amplifier may be time-gated in cadence with the UWB source thereby to reduce inter-pulse power consumption. The UWB transmitter is capable of extremely high pulse repetition frequencies (PRFs) and data rates in the hundreds of megabits per second or more, frequency agility on a pulse-to-pulse basis allowing frequency hopping if desired, and extensibility from below HF to millimeter wave frequencies.

A bit synchronizer for a digital receiver system accounts for loss of bit synchronization due to transmission phenomena. The bit synchronizer includes a DC level estimator for converting a sampled digital signal having a bit rate and a sampling rate into a level-adjusted signal. A delay module generates a first timing signal, a second timing signal, and a third timing signal based on the level-adjusted signal. The timing signals correspond to early, on-time, and late sampling windows. The control module generates an output signal based on the timing signals such that the transmit and receive bit timing are synchronized. In one embodiment, the control module has an absolute value stage, an integration stage, and a signal selector. The signal selector is able to select between the timing signals, adjust the symbol rate to re-center the on-time gate, and memory swap to maintain correct averaging operations.

A security system senses intrusions into a shipping container through the opening of doors, cutting an opening, or removing the doors from their hinges. Intrusion information is transmitted to a remote receiver without interrogation, thereby reducing power consumption. Sensing is accomplished by employing a range-gated micro-impulse radar (“RGR”) that generates microwave pulses that bounce around the interior of the container. The RGR includes a range gate that enables measuring reflected signals during the time gate period that is set for the time it takes a pulse to propagate a maximum distance within the container and reflect back. A direct current signal level is produced that represents the average reflected signal level within the container, and a Doppler shift measurement is made that represents motion inside the container. The signals are conveyed to the transmitter for conveyance to the remote receiver.

A low-power implant system. The system includes an implant for implantation into a person, such as a cochlear implant or a middle ear implant. The implant is capable of communicating with a device via transmission of ultra wideband pulses. The device may be adapted to be worn external to the person, or may be a second implant. So as to conserve battery power, the transmitted ultra wideband pulses may have a low duty cycle of approximately 1/1000 or less. Power savings may also be realized by using time-gating amplifiers in the implant and/or device receiver.

A gate driving circuit and a display device having the same, in which the gate lines can be divided into p groups using p shift registers and p-time gate lines can be driven using a signal shifted by 1/p, wherein p is an arbitrary natural number of three or more. Accordingly, since a number of gate lines can be driven using the plurality of shift registers, high-resolution display devices can be manufactured at a low cost.

The invention relates to an intelligent antenna under DTX or HSDPA mode, and a relative device, wherein the method comprises that (1), judging if the system setting is ascending DTX or HSDPA mode, (2), according to user ascending signal information, calculating out beam shaping weighting value of current user special channel, (3), judging if the distance between ascending and descending time is over a time threshold value, (4), current beam shaping weighting value uses the beam shaping weighting value of public channel, (5), judging if current time has user ascending signal, (6), the current beam shaping weighting value uses the history service beam weighting value of last time, (7), according to the beam shaping weighting value, realizing descending beam shaping. The invention can effectively adapt the real0-time change of wireless channel, improve the intelligent antenna property of ascending DTX or HSDPA mode, and improve system stability and reliability.

This invention provides a sort of metrical method which realizes the forecast of the angular displacement of the numerical control rotating floor by the time-bar displacement sensing device. Add an intelligent interface unit between the time-bar and the numerical control system, the import of the intelligent interface unit is the absolute value of the angle which is measured by the time-bar; the export is the increment type impulse signal which can connects with the currency numerical control system. The intelligent interface unit progresses the forecast to the angular displacement figures in the unborn spell according to several discrete absolute value of the measured angle of the time-bar which is in the nonce and in the past. It corrects the predictive error figures which are in the former time slice according to the real measured angle figures which is in now. It realizes the predictive measure of the angular displacement of the numerical control rotating floor. This invention applies to the displacement sensing device with the timing sampling that the time-bar is used to be the deputation, and it applies to the position feedback of the whole closed loop which is from the function unit of the numerical control division likes the numerical control rotating floor, and so on.

The present invention discloses a laser induced fluorescence remote measuring method for water body pollution. It is characterized by that the equipment for implementing said method includes the following several components: Nd:YAG laser, receiving telescope, several fibre bundles, optical filters, photoelectric multiplier and gating device, etc. Said invention also provides the concrete connection mode of all the above-mentioned components and the working principle of said remote measuring method.

The invention advances a new tooth electro time-grating displacement sensor able to make both dynamic and static measurement, making two groups of teeth on both stator/scale and rotor/slide, selecting two groups of teeth on the stator/scale or rotor/slide and staggering by half tooth to form orthogonal, not staggering the other two groups of teeth, forward and backward winding coils on the stator/scale and rotor/slide at regular tooth intervals, using two groups of coils as excitation coils and exciting by two orthogonal simple harmonic waves so as to obtain standing wave responses in the other two groups of coils as standing response coils, superposing the two standing waves and obtaining electric travelling wave whose phase shift directly reflects angular or linear displacement. And its stator/scale and rotor/slide framework can be machined by any common- precision machining device to assure uniform coil distribution, and it can replace any present static and dynamic measuring means to implement high-precision measurement.

A power transistor is provided with at least one transistor finger that lies within a semiconductor material. The gate oxide is segmented into a set of segments with thick field oxide between each segment in order to reduce gate capacitance and thereby improve a resistance times gate charge figure of merit.

The invention relates to a left and right track reversed phase detection method for an audio signal, and is characterized in that the method comprises the following detection steps: each preset parameter value is obtained, and each intermediate variable is initialized; a sampled value is obtained by using audio collection equipment, and in a detection time slice P, the reversed phase sampling time c1 and the same phase sampling time are counted; if the reversed phase probability r is larger than a threshold R of the reversed phase probability, a current audio signal state value V(n) is judged to be a reversed phase; when the accumulated detection time t is larger than or equal to the length T of the detection time, the reversed phase percentage s is calculated; when the reversed phase percentage s is larger than the reversed phase sensitivity S, the state of the current audio signal is determined to be the reversed phase; when an accumulated reversed phase time d1 is larger than or equal to a threshold D1 of the reversed phase time, the audio signal is confirmed to be in the reversed phase; when an accumulated same phase time d2 is larger than or equal to the threshold D2 of the same phase time, the audio signal is confirmed to be in the same phase; otherwise, the audio signal is in the critical state. The detection method confirms the final state in combination with a historical state value and a current state value, thereby greatly reducing the affect of the randomness of an audio phase to the stability of a detection result, and ensuring the accuracy of the detection method; therefore, the detection method is applicable to various sound systems application situations.

An messaging application for electronic devices that allows a sending user to time-gate messages so that a receiving user can only access the message after a specified amount of time has elapsed. When the specified amount of time has passed the receiving user can access the message which presents a reveal effect which may include, a graphic, an animation, text, an audible cue, a haptic cue, or a combination thereof.

The invention relates to a portable detector for measuring human blood sugar concentration by combining time-resolved transmitted spectrum measuring method with Laplace analysis. A human blood composition non-invasive monitoring device comprises an optical table, a photoelectric detection system and a computer, wherein the optical table comprises a laser source module, a finger frame and a pneumatic sleeve, and the photoelectric detection system comprises a photomultiplier, a photomultiplier gaining module and a single photon counter module. The output end of the laser source module is connected with one input end of the finger frame, the output end of the pneumatic sleeve is connected with another input end of the finger frame, the output end of the finger frame is connected with the input end of the photomultiplier, the photomultiplier gain module is connected with another input end of the photomultiplier, the output end of photomultiplier is connected with the input end of the single photon counter module, and the output end of the single photon counter module is connected with the input end of the computer. The human blood composition non-invasive monitoring device detects concentration of acetone in breathed gas of human bodies through a cavity ring-down spectroscopy technique and a background deduction method for diagnosis of diabetes mellitus.

There is provided an optical receiver in which a time gate can be realized with a simple, low-cost configuration, and which has few aspects that require adjustment. The optical receiver of the present invention comprises a decoding circuit in which optical signals which are spread over time in accordance with a coding pattern are inputted and decoded in accordance with a decoding pattern; and a time gate circuit for generating a time gate signal that represents the interval of time in which a significant optical pulse is present in the decoded optical signal, and controlling the passage of the decoded optical signal. The time gate circuit comprises optical splitting means for splitting the decoded optical signal from the decoding circuit into two, optical/electric conversion means for converting one of the split optical signals into an electric signal, time gate signal generation means for generating a time gate signal whose frequency is the fundamental frequency component in synchronism with the electric signal, and gate means for controlling the passage of the other split decoded optical signal in accordance with the time gate signal.

Technology is provided in which, by performing time gate processing using a clock signal with time jitter suppressed, time and intensity fluctuations which in the prior art had been observed in auto-correlated signals after time gate processing are reduced. In a decoder, received optical code division multiplexed signals are divided into two, one of which is reflected as a decoded signal, and the other of which is transmitted as an encoded signal in the encoded state. In the clock extraction circuit, encoded signals are divided into first encoded signals and second encoded signals. In the first clock signal generation portion, first clock signals are generated from the first encoded signals, and optical pulses synchronized with the first clock signals are extracted from the second encoded signals, and second clock signals are generated from the extracted optical pulses. In the time gate processor, time gate processing of the decoded signal is performed, using the second clock signals as the gate signals, and the result is output.

The invention discloses a line stirrer design method for improving reverberation chamber field uniformity. The invention belongs to the technical field of electromagnetic compatibility testing. A method for evaluating electric field uniformity of a test area of a pulse excitation reverberation chamber comprises the following steps: acquiring S21 parameters at a plurality of vertexes of a test areaunder the position of a single stirrer through a proper amount of network analyzers, starting from a frequency domain, performing inverse Fourier transform to a time domain, intercepting a time domain signal in a time period through a time gate technology for processing, intercepting a section of signal of a source signal in the test area of a reverberation chamber through the time gate technology, and calculating an electric field intensity standard deviation and a total standard deviation in the time gate; and finally, comparing the obtained standard deviation in the orthogonal direction and the total standard deviation with specified values of the International Electrotechnical Commission. The measurement process is simple and convenient, the speed is high, and the test time is saved.The introduced error is small, and the obtained result is closer to the distribution characteristic of an electromagnetic field environment of the test area in the real reverberation chamber.