17 results about "Keying" patented technology

This invention discloses a simple, multifunctional, integrated 5G analog fronthaul in-band full-duplex communication method for remote units (RUs). This method primarily relates to the fields of optical communication technology and microwave technology. The system structure of the method, as shown in Figure 1 of the specification, includes a laser, downlink vector signal, electrical local oscillator signal, downlink interference signal, target signal, reference signal, 90° electrical coupler, dual-polarization quadrature phase-shift keying modulator, phase modulator, single-mode fiber, optical coupler, polarization beamsplitter, polarization beam combiner, polarization controller, polarizer, and photodetector. The remote unit (RU) uses a single phase (PM) modulator to achieve self-interference cancellation (SIC) combined with anti-fiber dispersion transmission and down-conversion, eliminating the need for bias control and additional local oscillator (LO) branches, resulting in a simple structure. At the central office (CO), the carried downlink signal and local oscillator signal are single-sideband modulated to achieve anti-fiber dispersion transmission. The RU uses wavelength reuse technology to perform PM cascaded down-conversion on the signal received from the uplink, and the SIC is moved from the RU to the CO to simplify the RU. The entire link has no optical filter and is reconfigurable.

The application discloses a kind of conversion method and system of timing sampling data to whole cycle sampling data, and the present application obtains the timing sampling time based on the keying position moment when obtaining keying position moment by timing sampling, according to the timing sampling time and the vibration signal of timing sampling, obtains the vibration signal of whole cycle sampling, effectively realizes the conversion of timing sampling data to whole cycle sampling data, can make timing sampling acquisition system realize whole cycle sampling function, and the present application can be realized by software, without changing the hardware structure of timing sampling acquisition system, without increasing hardware investment.

Provided are a method for waking up a device and a communication apparatus, the method comprising: determining, by a first device, wake-up information, the wake-up information being used to wake up a second device or not to wake up the second device; determining a wake-up sequence based on the wake-up information; and transmitting the wake-up sequence to the second device at a wake-up signal receiving opportunity of the second device, each bit of the wake-up sequence being modulated into one or more low-power wake-up symbols by on-off keying, the wake-up signal receiving opportunity comprising a wake-up signal receiving opportunity frequency domain resource, the wake-up signal receiving opportunity frequency domain resource being adjacent to an edge of a transmission bandwidth of the first device in a frequency domain. The frequency domain resource occupied by the transmission of the low-power wake-up symbol is adjacent to the edge of the transmission bandwidth of the first device in the frequency domain, which can reduce the influence of the transmission of the low-power wake-up symbol on the spectral efficiency of a main communication link, and is conducive to ensuring the compatibility of the link for transmitting the low-power wake-up symbol with the main communication link.

This invention discloses a differential chaotic phase-shift keying waveform design method and modulation / demodulation method suitable for integrated communication and sensing. In this invention, the reference subcarrier and data subcarrier within the same subcarrier group share the same chaotic reference sequence, allowing the receiver to recover the original data using the existing OFDM-DCSK incoherent detection structure. Simultaneously, based on the Riemann matrix-based group selection mapping method, by constructing a constant complex weight vector within the group, multiple OFDM-DCSK time-domain candidate waveforms are generated and selectively transmitted without changing the OFDM-DCSK system's "reference-data equal-weight spread spectrum" structure and the receiver's incoherent demodulation method, thus achieving effective suppression of PAPR in the transmitted waveform. Using the OFDM-DCSK time-domain candidate waveforms as a unified baseband signal, incoherent communication and radar sensing functions are simultaneously realized with a single hardware and spectrum resource.

This application discloses a matrix keypad circuit and a meter, relating to the field of keypad circuit technology. It includes a grounding keypad unit comprising N grounding keys, each grounding key's first end connected to an input / output port, and the second end of each grounding key being connected to a common ground. It also includes N scanning keypad units, each comprising N-1 scanning keys and a first diode. The scanning keys and the first diode within the same scanning keypad unit are connected to different input / output ports, and are shared. The first diodes in the N scanning keypad units are connected to different input / output ports. A controller, connected to the input / output ports, is used to sequentially select one input / output port as a level input port and identify the level of the level output port and the level of the level input port to determine the matrix keypad state. The level output port is one of the N-1 non-level input ports among the input / output ports. This application improves the utilization rate of the I / O ports on the matrix keypad circuit.

A radar device includes a transmitting antenna unit, a modulator, a receiving antenna unit, a receiver, and a processor. The transmitting antenna unit includes transmitting antennas. The modulator generates transmission signals respectively provided to the transmitting antennas by executing phase-shift keying through diverging the common signal into diverged signals having the number being equal to the number of the transmitting antennas and rotating respective phases of the diverged signals. The receiving antenna unit includes at least one receiving antenna. The receiver generates a received code of at least one received signal. The received code is acquired by encoding an appearance pattern of a peak of at least one received signal on a Doppler frequency axis. The processor generates information related to an object, according to the received code generated by the receiver. The modulator executes the phase-shift keying by using a linear block code as an assigned code.

A fluid filter system comprising a universal keying element has been disclosed. A filter subassembly component usable in the fluid filter system, such that the filter subassembly component is to at least one of filter a fluid entering the fluid filter system and regulate a flow in the fluid filter system, the filter subassembly component comprising a universal keying element. The universal keying element including a first configuration of engaging surfaces cooperable with a matching configuration of a complementary keying element of a first compatible filter subassembly component, and a second configuration of engaging surfaces cooperable with a matching configuration of a complementary keying feature of a second compatible filter subassembly component, in which the filter subassembly component is severally couplable to the first compatible filter subassembly component and the second compatible filter subassembly component.

The invention discloses a correlation type optical time domain reflection signal processing method and system, and relates to the technical field of optical fiber sensing, and the method comprises the following steps: a transmitting end transmits a dual-polarization quadrature phase shift keying optical signal to an optical fiber; a receiving end obtains a coherent superposition signal of the dual-polarization quadrature phase shift keying optical signal reflected by each scattering point of the optical fiber through coherent detection; respectively calculating respective Jones vector inner products according to the dual-polarization quadrature phase shift keying optical signal and the coherent superposition signal, and performing preset correlation operation according to the Jones vector inner products of the dual-polarization quadrature phase shift keying optical signal and the coherent superposition signal to obtain a composite signal. Natural suppression of laser phase noise, obvious weakening of optical fiber front section common optical path disturbance and stable measurement insensitive to polarization state rotation can be realized.

Systems and methods are disclosed for orchestrating sensitive identity actions, including recovery, re-keying, and credential rotation, using risk-conditioned control selection and enforceable authorization gates. A gateway obtains contextual signals, computes a risk output, and selects a discrete policy band specifying required step-up verifications, a quorum threshold t, and a cryptographic profile. When quorum authorization is required, an escrow instance is initiated that stores required step-ups and threshold t, custodians are assigned, and approvals are accepted only from assigned custodians and only upon verifiable step-up satisfaction. Upon quorum satisfaction, the system releases a release value, performs crypto-agile re-keying under classical, hybrid, or post-quantum profiles, and optionally executes a dependency-aware rotation plan with validation and rollback. The system generates decision receipts and audit events binding inputs, policy outputs, approvals, escrow transitions, and resulting actions, with optional integrity protections enabling independent verification and tamper detection.

Methods, systems, and devices for wireless communications are described. In some cases, a wireless device may communicate an indication that probabilistic shaping is to be applied to each ring of a set of rings of a geometric modulation scheme and an indication of a non-uniform distribution associated with the probabilistic shaping. Additionally, the wireless device may perform probabilistic shaping to map a set of information bits to a set of constellation points associated with the set of rings in accordance with the non-uniform distribution, where the non-uniform distribution indicates an unequal probability of the set of information bits being mapped to each ring of the set of rings. Thus, the wireless device may transmit a message based on a modulation symbol sequence that is generated based on the set of information bits mapped to the set of constellation points.

Magnetic actuation involving key structure for percussive feedback effect. A key switch for a keying device, comprising: a housing having an internal structure, wherein a cavity is defined within the internal structure; a plunger protruding from a top side of the housing and extending into the cavity, the plunger operable to be pressed and travel along a linear range of motion within the cavity of the housing; a plug composed of a magnetic material and configured at a bottom section of the cavity; and a conductive coil, wherein the conductive coil is operable to generate a magnetic field in response to receiving an electric current, the magnetic field operable to magnetically move the plug within the cavity such that the plug impacts a portion of the housing or the plunger, wherein the impact produces a feedback effect that is mechanically transferred through the key switch.

This invention provides a novel space optical communication pulse-modulated optical signal transmitting device and modulation method, which combines the characteristics of PAM modulation and pulse modulation. It maintains the timing accuracy of pulse communication systems while enabling each pulse to carry more bits of information. Compared with traditional OOK or PPM systems, it can significantly improve the information transmission capacity per unit bandwidth and the optical link spectrum utilization efficiency. Through the multi-level mechanism of PAM modulation and the cooperation of a high sampling rate photodetector, the system has stronger fault tolerance to non-ideal channel conditions such as jitter and path disturbance, making it suitable for communication scenarios with frequent dynamic changes, such as inter-satellite communication and UAV networking. At the same time, the signal control board has a multi-level adjustable mechanism of 16, 32, and 128 levels, allowing users to flexibly configure the system transmission rate and error resistance according to actual needs such as communication distance, link quality, and power budget, thereby improving the system's adaptability and overall performance.

Optical fiber connectors, cable assemblies, and methods for manufacturing them are described. In one embodiment, the optical connector comprises a housing and a multifiber ferrule. The housing comprises a longitudinal channel between a rear end and a front end, and a rear portion of the housing comprises a coding or keying portion and at least one locking feature integrally formed in the rear portion of the housing.

According to an embodiment, a glitch rejection circuit includes a first stage averaging circuit with programmable length, a second stage averaging circuit, and a hysteresis comparator. The first stage implements a recursive moving sum average using a FIFO buffer to process a binary input signal. The second stage provides moving average filtering. The hysteresis comparator uses programmable thresholds set based on peak signal values to generate a clean output signal. The circuit removes glitches from frequency-shift keying (FSK) demodulator input signals while maintaining signal integrity at high bitrates. The programmable parameters allow optimization based on expected glitch characteristics and system requirements.

The application discloses an APF multi-machine parallel system current sharing control method and system, a storage medium, and an APF multi-machine parallel system, which is composed of N single-phase APFs connected in parallel to an electric network and is used for compensating for harmonic currents and reactive currents of the electric network; a signal generation module generates a data signal by using a modulation method of direct sequence spread spectrum differential phase shift keying (DS-DPSK); a signal acquisition and demodulation module is used for collecting, filtering, despreading and demodulating an electric network voltage signal and restoring the same into a corresponding data signal; and a compensation control module adjusts a compensation coefficient to realize current sharing control according to the received data information. The application can realize power quality treatment, data transmission, current sharing control for reducing inverter loss and safe and stable operation.

This application discloses a half-duplex protocol synchronization control method and system based on out-of-band digital keying features, relating to the field of digital communication and network protocols. The method includes: setting a sub-band outside the main data carrier band; generating a pseudo-random sequence containing local node identifiers, timestamps, and channel coordination information, and modulating it into an out-of-band digital keying signal, which is then combined with the main data signal to form a radio frequency signal for transmission; during node transmission, acquiring a mixed signal superimposed on the local transmission component and the external radio frequency signal via split-feed and monitoring the receiving path, and performing out-of-band filtering, demodulation, and weighted cross-correlation detection to suppress local transmission interference, identify external node sequences, obtain arrival time peaks, and parse external identifiers, timestamps, and coordination control information; calculating the time deviation based on the local receiving time, completing clock synchronization correction, and adjusting the transmission state and link time slot scheduling. This improves the synchronization sensing capability and coordination control reliability during transmission.