12 results about "Phase alignment" patented technology

Techniques and apparatus for wireless communication are provided. An example method generally includes: transmitting at least one transmit waveform via at least one transmit antenna; receiving a first receive waveform via a first receive antenna; receiving a second receive waveform via a second receive antenna, the first receive waveform and the second receive waveform corresponding to the at least one transmit waveform; determining at least one tuning parameter based on the first received waveform and the second received waveform, wherein the at least one tuning parameter is associated with at least one of a phase difference or a time delay between the first received waveform and the second received waveform; and configuring at least one of a phase adjustment element or a timing adjustment element of a transmit chain coupled to each of the at least one transmit antenna based on the at least one tuning parameter.

A timing-calibration circuit uses an active phase interpolator to calibrate clock delays through a number of passive fractional delay elements. The timing-calibration circuit minimizes system-wide power consumption by limiting the number and usage of active phase interpolators for delay adjustment in favor of the passive fractional delay elements.

Techniques and apparatus for wireless communication are provided. An example method generally includes: transmitting at least one transmit waveform via at least one transmit antenna; receiving a first receive waveform via a first receive antenna; receiving a second receive waveform via a second receive antenna, the first receive waveform and the second receive waveform corresponding to the at least one transmit waveform; determining at least one tuning parameter based on the first received waveform and the second received waveform, wherein the at least one tuning parameter is associated with at least one of a phase difference or a time delay between the first received waveform and the second received waveform; and configuring at least one of a phase adjustment element or a timing adjustment element of a transmit chain coupled to each of the at least one transmit antenna based on the at least one tuning parameter.

A radio frequency (RF) front-end module (FEM) includes an amplifier and an integrated circuit coupled to the amplifier. The integrated circuit includes a buffer amplifier coupled to the amplifier, a variable attenuator coupled to the buffer amplifier, a phase shifter or time delayer coupled to the buffer amplifier, and a memory configured to store a gain calibration value and a phase calibration value. The gain calibration value controls an attenuation of the variable attenuator and the phase calibration value controls a phase shift of the phase shifter or a time delay of the first time delayer. The RF FEM also includes an interface configured to store the gain calibration value and the phase calibration value in the memory, an RF connection to a transceiver, and an RF connection to an antenna.

A system for phase alignment includes a radio frequency integrated circuit (RFIC) having a phase locked loop (PLL) circuit and a missing pulse detection circuit, the missing pulse detection circuit configured to detect a missing pulse from a reference clock source and generate a detection pulse signal, and a counter reset circuit connected to the missing pulse detection circuit, the counter reset circuit configured to generate a counter reset signal in response to the detection pulse signal, the counter reset signal configured to establish an absolute time and frequency reference for the PLL circuit.

The present disclosure provides a synchronization method involving operation at a timing source and at remote timing circuits respectively communicatively coupled to the timing source. Generating, at the timing source, a reference signal having a reference frequency; generating a multi-tone waveform; and combining the reference signal with the waveform to generate a synchronization signal having a first temporal portion, the first temporal portion comprising the reference signal without the waveform, alternating with a second temporal portion comprising the waveform. The synchronization signal is transmitted to the timing circuit through each of a plurality of signal paths having different respective propagation delays. Each of the timing circuits determines a phase difference between the received single tones to determine a propagation delay of the connected signal path. Each reference signal is individually delayed at the timing circuit based at least on the propagation delay such that the timing circuit provides phase-aligned output reference signals.

Techniques and apparatus for wireless communication are provided. An example method generally includes: transmitting at least one transmit waveform via at least one transmit antenna; receiving a first receive waveform via a first receive antenna; receiving a second receive waveform via a second receive antenna, the first receive waveform and the second receive waveform corresponding to the at least one transmit waveform; determining at least one tuning parameter based on the first received waveform and the second received waveform, wherein the at least one tuning parameter is associated with at least one of a phase difference or a time delay between the first received waveform and the second received waveform; and configuring at least one of a phase adjustment element or a timing adjustment element of a transmit chain coupled to each of the at least one transmit antenna based on the at least one tuning parameter.

The invention discloses a ring oscillator based on multi-phase coupling calibration, which belongs to the technical field of radio frequency integrated circuit design and comprises three mutually coupled oscillation loops based on three-stage delay units and calibration loops among the oscillation loops. In the structure, an input node of a delay unit of each oscillation loop is connected with a calibration unit of a calibration loop, when phases at two ends of the calibration unit are inconsistent, oscillation loop current is redistributed through the calibration unit, and phase alignment is realized through a current real-time compensation mechanism; after the three oscillation loops are mutually coupled, phase jitter caused by external noise disturbance of any oscillation loop can be fed back to the other two oscillation loops through the calibration loop, so that automatic compensation and equalization of phase errors are realized in the whole system, and the phase noise of each oscillation loop is effectively reduced. Meanwhile, the dynamic phase calibration mechanism of the three oscillation loops significantly enhances the single event effect resistance of the circuit.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a measurement on a reference signal. Accordingly, the UE may transmit a meta indicator. The meta indicator may represent one or more properties associated with processing of the reference signal at the UE. Numerous other aspects are described.

The purpose of this invention is to provide a method for continuous acoustic signal splicing based on time-domain cross-correlation phase alignment, belonging to the field of acoustic signals. The method includes the following steps: receiving the original signal and bandpass filtering it; constructing a computational region for estimating the time delay difference; calculating the time-domain cross-correlation of the signal to estimate the delay; phase alignment and smooth weighted fusion; and recursively splicing segment by segment. After splicing all signals, a final continuous acoustic signal sequence is obtained. This invention ensures no phase distortion in the waveform and accurately captures the time delay, thereby achieving phase alignment. A continuous, smooth, and complete acoustic signal sequence is obtained through recursive segmentation. This invention synthesizes discrete short signal segments into a long signal with continuous phase, thereby obtaining a more granular frequency scale in the Fast Fourier Transform, effectively solving the problems of spectral overlap and insufficient resolution in narrowband signal detection.

The invention discloses an underwater acoustic reverberation suppression stationary phase nuclear inversion parameterized phase synchronization transformation method, device and equipment and a storage medium, and the method comprises the steps: determining the frequency spectrum power information and phase function of a transmitted underwater acoustic signal, carrying out the windowing processing of the received underwater acoustic signal based on the phase alignment information and phase translation information, and obtaining the phase function of the received underwater acoustic signal; performing parameterized phase synchronization frequency-time transformation on each receiving window signal to obtain a standard receiving window signal in phase synchronization with each transmitting window signal; transmitting time-frequency distribution data and receiving time-frequency distribution data are respectively determined, and kernel inversion iteration correction is carried out on each standard receiving window signal; according to the invention, the accuracy of the determination result of the target underwater acoustic signal can be improved, so that the reverberation interference is effectively suppressed, and the detectability of the weak target signal is improved.

The invention relates to the technical field of industrial data analysis, and discloses a generator set AGC regulation performance evaluation method and system, and the method comprises the steps: obtaining an automatic power generation control instruction sequence and an actual power sequence of a generator set, carrying out the processing, obtaining a regulation time lag, and carrying out the phase alignment processing of the actual power sequence; generating a reference response curve and a dynamic residual sequence based on a phase alignment result and a preset generator set physical inertia time constant; carrying out feature analysis on the dynamic residual sequence, identifying an effective adjustment interval and calculating a symbol flipping frequency; correcting the dynamic residual error sequence based on the symbol flipping frequency and a preset compensation factor to obtain a corrected residual error sequence; and carrying out statistics on characteristic parameters of the corrected residual error sequence, carrying out calculation to obtain an adjustment efficiency evaluation index of the generator set in a preset sampling period, and evaluating the AGC adjustment performance of the generator set according to the adjustment efficiency evaluation index. The power grid frequency modulation stability and the power supply reliability are improved.