8 results about "Digital control oscillator" patented technology

A communication system includes a master communication device and a slave communication device. The master communication device includes a first signal generator, a second signal generator, a signal combiner, and a transmitting HBC (Human Body Communication) electrode. The signal combiner combines a first signal with a second signal, so as to generate a third signal. The transmitting HBC electrode transmits the third signal through a human body. The slave communication device includes a receiving HBC electrode, a signal splitter, a processor, and an injection-locked DCO (Digital Control Oscillator). The receiving HBC electrode receives a mix signal from the human body. The signal splitter divides the mix signal into a data signal and a synchronization signal. The injection-locked DCO performs a time synchronization process according to the synchronization signal.

The application discloses a satellite navigation receiver signal processing method and system, and belongs to the technical field of satellite navigation. The method comprises the following steps: step 1, initializing the satellite navigation receiver, and establishing a communication link between the satellite navigation receiver and an RTK reference station; step 2, processing received satellite signals by the satellite navigation receiver to obtain satellite ephemeris parameters; then combining the received reference station data to form basic data; step 3, constructing a carrier phase double difference prediction model and a code phase prediction model, combining the basic data, respectively calculating local carrier signal control quantities and local code signal control quantities, and writing the control quantities into a digital control oscillator; and step 4, performing position solving, updating a satellite navigation receiver predicted position by using a new position obtained by solving, and feeding back to step 3 to form a closed loop control of position solving assisted signal tracking. The application can realize high-precision and continuous signal tracking in a complex environment.

The application relates to the field of satellite positioning technology and discloses a satellite signal receiving control method, device and equipment and a storage medium, the method comprising the following steps: receiving a frequency configuration instruction; determining a frequency configuration module to be switched according to a to-be-switched frequency in the frequency configuration instruction; adjusting the frequency of a local oscillator frequency signal of a transceiver through a digital control oscillator according to a target frequency in the frequency configuration instruction; controlling the local oscillator frequency signal to be input into a mixer of the frequency configuration module to be switched, so that the input signal of the frequency configuration module to be switched sequentially passes through the mixer, an analog-to-digital converter and a filtering and decimation module of the frequency configuration module to be switched, and then is matched with the target frequency, frequency configuration operation of the transceiver is completed, and the input signal is mixed with the local oscillator frequency signal in the mixer. The technical scheme of the application can adaptively configure the working frequency of the transceiver, and improve the detection precision and resolution of satellite signals.

The application provides a software-defined wake-up receiver implementation method and system, which comprises the following steps: a transmitter generates a wake-up sequence according to an agreed code rate and a wake-up sequence, and transmits the wake-up sequence at a frequency point at which a wake-up receiver works, so as to form a wake-up signal; a radio frequency front end of the wake-up receiver performs low-power down-conversion on the received wake-up signal, so as to obtain a baseband signal, and then moves the baseband signal from a carrier frequency to a base frequency; a comparator in the wake-up receiver compares the baseband signal after down-conversion with a threshold, so as to generate a bit stream; a correlator and a masker in a digital circuit of the wake-up receiver compare the bit stream under the clock driving of a digital control oscillator, detect a moment at which the wake-up signal ends, and pull up a wake-up flag, so as to enable a high-power circuit part. According to different steps and purposes of software definition, the wake-up receiver technology can be used for implementing network address allocation, changing signal properties of the wake-up sequence, improving security and the like.

This invention provides a fully digital phase-locked loop (PLL) and its locking method, comprising: dividing the output frequency of a numerically controlled oscillator (CNC) into N frequency bands through pre-calibration, and obtaining the input control word range corresponding to each frequency band, where N is a natural number greater than 1; setting the input control word of the CNC oscillator according to the locking frequency; inputting a reference signal and a feedback signal to a time-to-digital converter (TD-SCDC); and switching the loop state of the fully digital PLL from open-loop to closed-loop when the value of the phase digital signal output by the TD-SCDC meets a preset condition. By setting the input control word of the CNC oscillator according to the locking frequency, the phase of the feedback signal output by the CNC oscillator is made close to the phase of the reference signal, thereby making the value of the phase digital signal output by the TD-SCDC close to 0, thus enabling the loop state of the fully digital PLL to be quickly switched to closed-loop, solving the problem of how to shorten the locking time of the fully digital PLL.

The application provides a quartz gyro digital circuit phase compensation method and system, the method comprising: generating a co-directional signal and a quadrature signal through a digital control oscillator in a microprocessor; co-directionally demodulating a driving displacement signal output by an ADC in the microprocessor by taking the co-directional signal as a reference signal, and quadrature demodulating the driving displacement signal by taking the quadrature signal as a reference signal; and performing angle rotation on the driving displacement signal after co-directional demodulation and quadrature demodulation according to the time delay of a driving loop in a digital circuit of a quartz gyro, to obtain a new co-directional signal and a new quadrature signal. The application realizes phase compensation, guarantees the phase stability of the driving loop, accurately, reliably and efficiently controls the driving frequency of a digital quartz gyro, improves the performance of the quartz gyro, and is simple in design, saves devices and reduces costs.

The invention provides a programming method and device of a digital phase-locked loop system and a storage medium. The programming method comprises the following steps: acquiring a system design index and a process design package input by a user; generating a first file when the standard subunit is established according to the process design package; analyzing the system design indexes and the standard subunits to obtain types, sizes and connection relations of corresponding devices; configuring a numerical control oscillator, a time-to-digital converter and a digital filter according to the type, size and connection relationship of the corresponding device, and generating a second file based on the related information of the configuration process; performing a digital back-end process based on the second file to generate a third file; and integrating the first file, the second file and the third file into a configuration file. On the basis, key simulation units such as a numerical control oscillator and a time-to-digital converter can be parameterized, so that the key simulation units have the characteristics of configurable specification, migratable process and automatic layout generation while high performance is maintained.

The application discloses a signal loop adjusting method and device, electronic equipment and a storage medium, relates to the chip technical field, and the method is applied to an estimation module of a resolver digital converter and comprises the following steps: acquiring a first initial angle according to sine output signals and cosine output signals of a resolver; acquiring a first initial angular velocity according to at least two first initial angles and a sampling frequency of an analog-to-digital converter; sending the first initial angle to a digital control oscillator and sending the first initial angular velocity to a loop filter, so that the signal loop of the resolver digital converter performs a phase synchronization operation based on the first initial angle and the first initial angular velocity. The technical scheme of the embodiment of the application reduces the construction time of the closed loop of the resolver digital converter, improves the response speed of the feedback control system in the resolver digital converter, and further improves the decoding efficiency of the resolver digital converter.