116 results about "CONSECUTIVE SAMPLE" patented technology

Systems and methods are provided for estimating missing samples in a signal. A plurality of samples in the signal is received, and a respective sample corresponds to a respective sample location in a plurality of sample locations. A subset of sample locations representing missing samples in the signal is identified, and a first and a second threshold are determined. Each threshold is an integer number of samples, and the second threshold is greater than the first threshold. A first set of consecutive sample locations from the identified subset of sample locations is formed, and the missing samples in the first set of consecutive sample locations are replaced based on a comparison between a number of locations in the first set of consecutive locations, the first threshold, and the second thresholds.

The invention provides a compensation method for the rotor position angle of a permanent-magnet motor, which can enable a permanent-magnet synchronous motor to keep on stable operation under the conditions of a high speed and large rotary transformer errors. The method specifically comprises the following steps: sampling the rotor position angle of the permanent-magnet synchronous motor by using a rotary transformer coaxial with the permanent-magnet synchronous motor at a specific time interval, resolving output signals of a rotary transformer sensor by using a digital signal processing unit after each sampling operation, and judging whether the variation of the rotor position angle of the motor is within the allowed range; if so, directly using the rotor position angle value of the motor as a correction value of the current rotor position angle of the motor; and if not, calculating the correction value of the current rotor position angle of the motor based on the angular speed of the motor in the last sampling operation and the time interval between two consecutive sampling operations, and compensating for the time delay deviation of the rotor position angle of the motor by using a processor.

A method for judging the reverse connection of a flow sensor comprises the steps of: collecting a time sequence of pressure intensity x1, x2, x3 and x4 at four consecutive sampling points of time and the flow value S corresponding to that time sequence as basis for judgment; calculating three variables dx1=x1−x2, dx2=x2−x3 and dx3=x3−x4; judging a reverse connection of the flow sensor and giving an alarm signal when any one of the two instances appears: 1) x1, x2 and x3 are all smaller than zero and x1 and x3 are equal to or greater than x2, and flow value S is smaller than a predetermined first threshold value f1; 2) dx1, dx2 and dx3 are all greater than zero and dx1 and dx3 are smaller than or equal to dx2, and flow value S is greater than a predetermined second threshold value f2.

A method and circuit to produce an optimal sampling phase for recovery of a digital signal is achieved. A digital signal is over-sampled by sampling on each phase of a multiple phase clock to generate a sample value per phase. The multiple phase clock may be generated by a DLL. A voted value is determined per phase comprising a majority value of a set of consecutive sample values. Transition phases are sensed. A transition phase is defined as two consecutive voted phases comprising different values. The transition phases are compared to a stored phase state to determine a signal shift direction. The signal shift direction is filtered to generate a state update signal. The stored phase state is updated based on the state update signal. The stored phase state corresponds to an optimal sampling phase for recovery of the digital signal.

A self-adjusting hold-off trigger circuit and method detects a threshold crossing between consecutive samples of a digitized input signal as edge events, identifies the crossing as a qualified trigger event if the crossing is in a desired direction based upon trigger criteria, and provides a trigger output when the qualified trigger event occurs greater than an approximate average or peak time after a preceding edge event.

The present publication describes a data transfer method and system in a digital sound reproduction system. The method comprises method steps for generating a digital audio stream for multiple channels in a host data source, e.g. a computer, the audio stream is formed by multiple consecutive samples, receiving the digital audio stream sent by the host data source through a digital data transmission network by several digital receivers each of which including a microcontroller with a clock, the receivers further including means for generating an audio signal. In accordance with the invention the host data source sends repeatedly a synchronization sample to at least one receiver, the receiver replies to the synchronization sample by a return sample, the host calculates a latency (T) for each receiver based on the sending time (Th₁) of the synchronization sample and the reception time (Th₂) of the return sample and the processing time (Tt₁-Tt₂) of the receiver, the host sends to the receiver information of the calculated latency (T) in combination with the time stamp the measurement time, based on this information the receiver adjusts the function of its clock, and the above synchronization steps are repeated continuously.

A timing recovery system encodes data while impressing recognizable patterns thereon, enabling precise timing during subsequent readback operations. An uncoded binary sequence is encoded using an m/n rate block coded sequence, incorporating a unique predetermined binary bit pattern that occurs with a selected level of frequency. The encoded sequence is stored on the recording medium as a series of flux transitions. To read back the stored data, a read head measures the flux transitions stored on the medium and generates a representative analog waveform. A sampler samples the waveform in accordance with a timing scheme provided by a timing circuit. The timing circuit adjusts the timing of the samples to ensure that the analog waveform is sampled at appropriate times to yield the most accurate results. The timing circuit evaluates two consecutive samples to identify samples associated with features of the analog readback waveform that corresponds to the predetermined bit patterns. Identified samples are then compared to determine whether timing of samples should be advanced, retarded, or retained with respect to the analog waveform. After a detector translates samples into an enclosed binary bit stream, a decoder decodes the detector's binary bit stream by revising the original encoding process, recreating the original encoded binary sequence.

A method of synchronizing to GSM RF downlink signal frame timing includes acquiring a continuous sample data record from a base RF channel (BCCH) of the RF downlink signal that encompasses multiple frames of the GSM RF downlink signal to guarantee inclusion of synchronization frames. The location of a frequency correction burst within the sample data record is searched for and, once the frequency correction burst location is found, a synchronization burst is searched for within a limited time range about a predicted location to determine a precise indication of frame location. With frames precisely located, data may be extracted from any desired slot of the frames from the continuous sample data record, or of frames in a continuous sample data record acquired from a related measurement channel, for further measurement processing.

A system and method in a communication device (10) uses timing tracking to correct timing drifting due to the difference in frequency of a transmitter clock and a receiver clock. With the timing tracking, correlation values of three consecutive samples are calculated using the receive signal and the recovered symbols and then summed. A timing signal, (n_k, frac_k) is updated based upon a metric calculated from a previous correlation value, R₋₁, present correlation value (R₀) and a next con-elation value (R₊₁). Adjustment of timing signal is based on the relative location with respect to the current timing of a peak of a second order polynomial curve formed by the first correlation value R₋₁, the second correlation value R₀ and the third correlation value R₊₁.

The invention relates to a sampling device suitable for bioreactors such as microbial fermentation and cell culture, in particular to a concentration gradient diffusion sampling device, which is based on the concentration difference caused by the concentration difference of each component in the liquid in the solution on both sides of the separation membrane. The principle is to form a concentration gradient distribution of components (measured samples) in the sampling pipeline, and the flux or rate of diffusion follows Fick's law. Using this device to sample the samples in the bioreactor has the advantages of effectively preventing sampling pollution and good safety; there is no filtration process of the solution, the membrane pores should not be blocked, and the stability of continuous sampling is high; the sample components are in the sampling pipeline A gradient distribution is formed, which can be measured without cumbersome dilution, making the online detection system simpler, with faster measurement speed and wider linear range, and is especially suitable for on-line detection of various flow injection analysis systems.

A method and apparatus for real-time derivation of precise digital clock edges and synchronous logic samples from a digital signal having a clock channel and at least one data channel acquires a plurality of temporally offset analog samples during each of a sequence of sample periods and from consecutive samples where there is a logic level transition estimates an edge time. From the edge times for the clock channel an offset is added and applied to the at least one data channel to determine the synchronous logic samples for the data channel at each offset clock edge time.

The invention discloses a temperature control method and device for a radio frequency ablation device, and relates to medical device technologies. The method includes the steps of acquiring a temperature of a radio frequency ablation unit, calculating a first temperature difference between the temperature of the radio frequency ablation unit and a preset temperature, and determining whether an absolute value of the first temperature difference is greater than a preset first temperature threshold; when the absolute value of the first temperature difference is greater than the first temperaturethreshold, setting the power of the radio frequency ablation unit to a preset power; otherwise, controlling the power of the radio frequency ablation unit according to the first temperature differenceand the temperature difference change rate; the temperature difference change rate is a difference between the first temperature differences of two consecutive sampling instants. The method can quickly and stably make the temperature of the radio frequency ablation device reach the set temperature range, after the set temperature range is reached, and the temperature of the radio frequency ablation device is kept stable, thereby ensuring the therapeutic effect and treatment safety of the radio frequency ablation technique.

A signal processing apparatus includes an absolute value unit configured to convert an audio signal into absolute values, a representative value calculation unit configured to calculate representative values of consecutive sample values included in blocks of the audio signal which has been converted into the absolute values using at least maximum sample values among values of the samples included in the blocks for individual blocks, an average value calculation unit configured to determine a section which includes a predetermined number of consecutive blocks as a frame and calculate a maximum value of the representative values of the blocks included in the frame and an average value of the representative values of the blocks included in the frame, and a detector configured to detect click noise in the frame on the basis of a ratio of the maximum value to the average value.

A method of calibrating a level gauge system using electromagnetic signals to determine a filling level of a product in a tank. The level gauge system comprises a real time sampler for sampling a reflection signal with a sampling period between consecutive samples. The method comprises the steps of: receiving timing signals from a wireless communication network; generating time stamp signals based on the timing signals; registering a number of the sampling periods between a first time stamp signal and a second time stamp signal; and determining the sampling period based on the registered number of sampling periods and a time between the first time stamp signal and the second time stamp signal. Various embodiments of the present invention provide for high accurate determination of the filling level in a tank without the need for a temperature stable and highly accurate clock reference in the level gauge system.

A frequency analyzer uses a new approach to determine simple and multi-frequency components. The invention mainly comprises a complex filter and a frequency discriminator. The real number part of the input frequency can be represented by a frequency spectrum composed of both positive frequencies and negative frequencies. The complex filter receives an input signal through two sampling points, and then the frequency discriminator computes the phase difference between two sampled signals from these two consecutive sampling points. After applying an inverse trigonometric function, the demodulated frequency is derived from the phase difference. Using a complex function to derive the demodulated frequency is more advantageous in that many high-frequency sampling circuits become unnecessary, thus reducing the power consumption of the frequency demodulation circuit.

A radar apparatus and method for determining the range to and velocity of at least one object comprising, transmitting a plurality of RF signals, each comprising a particular frequency and being transmitted during a particular unique finite period, the plurality of signals collectively comprising at least one first subset of signals having the same frequency and at least one second subset of signals having different frequencies, receiving the plurality of signals after reflection from an object, determining a phase difference between each of the signals and the corresponding reflected signal, each piece of phase difference information herein termed a sample, organizing the samples in two-dimensions wherein, in a first dimension, all samples have the same frequency and, in a second dimension, all consecutive samples are separated from each other by a fixed time interval; processing the samples in the first dimension to determine a phase rotation frequency corresponding to the samples in the first dimension, the phase rotation frequency comprising a Doppler frequency for the at least one object, processing the samples in the second dimension to determine a second phase rotation frequency corresponding to the samples in the second dimension; the phase rotation frequency comprising Doppler frequency and range frequency for the at least one object; comparing the first phase rotation frequency to the second phase rotation frequency to distinguish range frequency from Doppler frequency of the at least one object; and converting the Doppler frequency to a velocity of the object and converting the range frequency to a range of the object.

Rejection of local oscillator alias response is provided in a mixing circuit by (1) a switching mixer producing an output that changes at least twice between two states (e.g., high-low-high or low-high-low) during each local oscillator period, and (2) a charge integrator integrating current output from the switching mixer over the local oscillator period. The switching mixer and charge integrator produce a sampled data format, double sideband signal with serial cancellation of the switching mixer's alias responses. An extension unit connected in series with the switching mixer and charge integrator, and implementing a transform function computing a difference between consecutive samples, produces a cascading effect with the switching mixer and charge integrator, optionally producing additional nulls suppressing alias response at frequencies near the local oscillator frequency. A harmonic gating circuit between the switching mixer and charge integrator, controlled at a multiple of the local oscillator frequency, suppresses harmonic responses of the switching mixer.

The invention is generally directed towards monitoring of a signal (M), such as a clock signal or a data signal, by sampling the signal to obtain a discrete sample representation of the signal and analyzing the sample representation. The idea according to the invention is to slide a sample window (SW) over the sampled signal and determine whether the samples currently within the window include a valid transition sequence. In the general case, the existence of a valide signal is confirmed as long as a valid transition sequence is present in at least one of a predetermined number of consecutive sample windows. In order to reduce the need for oversampling in high-frequency applications, the invention furthermore proposes a multi-phase sampling technique according to which a number of phase-shifted sample clocks (S₁ to S_N) are generated for the purpose of sampling the signal to be monitored. Higher-frequency oversampling is thus replace by a higher resolution in the time domain.

Embodiments of the invention relate to the technical field of infrared touch control devices, and particularly relate to a display screen brightness adjustment method and device. The method comprises: when there is no user touch control action, periodical sampling of an infrared receiving tube in an infrared touch control frame is performed; whether the difference values between infrared signal parameter values of N consecutive samplings and a reference parameter value are all greater than an abrupt change threshold is determined, wherein the N is an integer not less than 2; when the difference values between the infrared signal parameter values of N consecutive samplings and the reference parameter value are all greater than the abrupt change threshold, a display brightness adjustment command is generated. According to the technical scheme, the method and the device can adjust the brightness of high-sensitivity display screen without adding extra light sensing elements.