110 results about "Keying" patented technology

The invention provides an M-system chaos shift keying communication method, device, equipment and medium, and the method comprises the steps: generating a long chaos sequence and a short chaos sequence through employing two chaos generators with different chaos mapping, mapping an M-system symbol into an embedded position through employing a symbol-to-position mapping table, and carrying out the mapping of the M-system symbol into the embedded position; a short chaotic sequence is embedded into a corresponding position of a long chaotic sequence to generate a combined chaotic transmitting signal, so that M-system transmission can be realized only through two chaotic generators, and M chaotic mapping is not needed to construct a signal space; and a receiving end adopts a deep neural network demodulation model to carry out probability judgment on the segmented subsequences, so that incoherent demodulation is realized, the traditional chaotic synchronization technology and orthogonalization technology are not needed, the system structure is effectively simplified, and the realization difficulty is reduced.

Apparatuses and methods for generating on-off keying (OOK) signal based on orthogonal frequency-division multiplexing (OFDM) waveform. A method for an Internet of Things (IoT) device to communicate with a reader includes receiving a preamble signal that includes a start indicator part (SIP) and a clock acquisition part (CAP), receiving a physical reader-to-device channel (PRDCH), and receiving a postamble signal. The preamble signal, the PRDCH, and the postamble signal are OOK modulated based on an OFDM waveform. The preamble signal is followed by the PRDCH without a gap. The PRDCH is followed by the postamble signal without a gap. When the postamble signal ends in during an OFDM symbol duration, a padding signal is included from the end of the postamble signal for a remainder of the OFDM symbol duration.

System and method for an over-the-air computation (AirComp) scheme for federated edge learning (FEEL) doesn't require channel state information (CSI) at the edge devices (EDs) or edge server(ES). The disclosure adopts the majority vote (MV) principle and defines multiple subcarriers and orthogonal frequency division multiplexing (OFDM) symbols for voting options, which reduces to frequency-shift keying (FSK) over OFDM subcarriers as a special case. Thus, FSK-based over-the-air computation is provided for federated edge learning without channel state information. Since the votes from EDs are separated on orthogonal resources, the scheme eliminates the need for truncated-channel inversion (TCI) at the EDs and allows the ES to detect MV with a non-coherent detector.

A transmitting apparatus and method for low signal-to-noise ratio, SNR, communications. An example method comprises transmitting (610) in a first mode, in which an Orthogonal Frequency Division Multiplexing, OFDM, waveform having an OFDM symbol length is formed using Inverse Discrete Fourier Transform, IDFT, functionality and transmitted. The method further comprises transmitting (620) in a second mode, in which an integer number of multiple-frequency-shift keying, MFSK, symbols per the OFDM symbol length are formed using the same IDFT functionality and transmitted, and selectively switching (605) between transmitting in the first mode and transmitting in the second mode. In embodiments, switching between the first and second transmission modes may be based on an estimate of signal-to-noise ratio, SNR, for a received signal and a target symbol-error-rate.

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.

Methods and systems for validating key rotation requests for endpoint devices are disclosed. The key rotation requests may be signed by one or more signing systems according to a set of re-keying rules for the endpoint device. The set of the re-keying rules may indicate that key rotation requests may be valid if signed using at least two different keys. The set of the re-keying rules may also indicate that each of the at least the two different keys be from a different grouping of keys of multiple groupings of keys included in a secure key repository. Each grouping of keys may be associated with a different organization. Therefore, key rotation requests may be serviced if signatures associated with the key rotation requests meet the re-keying rules thereby decreasing a likelihood of compromise of the endpoint devices via compromise of a key.

This disclosure provides a signal processing method and system for continuous-variable quantum key distribution, relating to the field of communication technology. The method includes: up-converting two double-sideband quadrature phase-shift keying (PSK) signals to a first center frequency and a second center frequency, respectively, to form a first quantum signal in the X-polarization direction and a first quantum signal in the Y-polarization direction; adding a first pilot signal in the X-polarization direction to the first quantum signal in the X-polarization direction to obtain a first optical signal in the X-polarization direction; adding a first pilot signal in the Y-polarization direction to the first quantum signal in the Y-polarization direction to obtain a first optical signal in the Y-polarization direction; using a polarization coupler to combine the first optical signal in the X-polarization direction and the first optical signal in the Y-polarization direction into a polarization multiplexed signal; and transmitting the polarization multiplexed signal to a receiver through a quantum channel. According to embodiments of this disclosure, the security key rate of continuous-variable quantum key distribution can be improved.

A disarmable port protector for locking engagement of a communication port of electronic equipment includes a lock body for retentively engaging the communication port when disposed at a locking position. The lock body includes an interface portion and an engagement portion extending longitudinally therefrom. A key body coupled to the lock body is displaceable between protecting and disarming positions relative to the lock body. The key body includes a base portion and a disarming portion extending longitudinally therefrom. The disarming portion in the disarming position disengages the lock body from the communication port for withdrawal from the locking position. A keying portion extends from the base portion for stopping engagement of the lock body when in the protecting position. The key body is released for displacement to the disarming position upon the keying portion being at least partially displaced relative to the base portion in tamper evident manner.

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.

The invention provides an intelligent lock detection method and system based on an optical signal or a magnetic induction signal, and the method comprises the steps that an intelligent lock end employs an amplitude on-off keying to transmit a digital binary code stream to a detection end, and the code stream comprises a random digital signal and a checksum signal; the detection end judges the state of the intelligent lock according to the state of the code stream data; the intelligent lock detection method comprises a detection method based on an optical signal and a detection method based on a magnetic induction signal. The detection method comprises the following steps: the intelligent lock end adopts an MCU (Microprogrammed Control Unit) to drive an infrared emission LED (Light Emitting Diode) to emit an optical pulse signal; the detection end adopts an infrared receiving LED to continuously receive an optical pulse signal, the optical pulse signal is converted into a TTL level to be output, the TTL outputs a high level when the optical pulse signal has a carrier wave, and the TTL outputs a low level when the optical pulse signal does not have the carrier wave; and continuously detecting the high-level time and the low-level time, and judging the state of the received code stream data through the high-level time and the low-level time. The state of the intelligent lock is continuously detected in the whole process, cheating is prevented, and the safety of the intelligent lock is guaranteed.

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of a user equipment (UE) in a wireless communication system includes determining an on-off keying (OOK) waveform for a low power synchronization signal (LP-SS), and determining at least one of an LP-SS reference signal received power (LP-RSRP), an LP-SS reference signal received quality (LP-RSRQ), an LP-SS received signal strength indicator (LP-RSSI), and an LP-SS signal to noise and interference ratio (LP-SINR) based on the LP-SS. The determined at least one of the LP-RSRP, the LP-RSRQ, the LP-RSSI, and the LP-SINR is based on a segment having a non-zero value in the OOK waveform of the LP-SS. The method further includes performing, using a low power receiver (LR) of the UE, a first radio resource management (RRM) measurement based on the LP-SS.

The present disclosure relates to a connector having plug-in contacts on top and bottom. The connector includes a housing, and first, second, third, and fourth rows of electrical contacts disposed in the housing. To help maintain and improve signal integrity, the connector housing may include one or more of the following: asymmetric keying features, asymmetric alignment features, and alternating plug-in electrical contacts.

Fiber optic connectors, cable assemblies, and methods of making the same are disclosed. In one embodiment, the optical connector includes a housing and a multi-fiber ferrule. The housing includes a longitudinal passage between a front portion and a rear portion, and the rear portion of the housing includes a keyed portion and at least one locking feature integrally formed in the rear portion of the housing.

According to an embodiment, a wireless power receiving device includes a demodulator that generates carrier cycle data from a received frequency-shift keying modulated signal with dithering. A high-pass filtering circuit extracts offset values from the carrier cycle data. A polyphase filtering circuit includes multiple smoothing filters and distributes the extracted offset values among these filters based on a dithering pattern length. A compensation circuit stores smoothed offset values from the polyphase filtering circuit in a dithering table during an evaluation window and applies these stored values to compensate carrier cycle data during subsequent demodulation.

A system may include a terminal block having a plurality of slots on a first side of the terminal block, such that each of the plurality of slots is configured to receive an insert. The system may also include an input / output (I / O) device comprising a circuit, such that the circuit may include one or more indentations that may receive one or more inserts positioned in one or more slots of the plurality of slots.

Disclosed is a method for implementing a block cipher that includes generating an initialization vector counter. The method includes generating a key tree based on the initialization vector counter where the key tree includes one or more coeval states and where each of the one or more coeval states represents a time period where the time period of each subsequent coeval state is nested within the previous coeval states. The key tree further includes the key that is determined for each of the one or more coeval states where each of the one or more coeval states is determined based on a counter. The message further includes encrypting, using the key, one or more blocks of data to be transmitted where the recipient is capable of decrypting the one or more blocks only if they are received during the time period of each of the one or more coeval states.

A packaging apparatus (200) for packaging a radio device (202) is disclosed that prevents erroneous assembly component attachment. The packaging apparatus includes a pentahedral bin (204) configured to store the radio device for transportation. A side plate (210) of the five-sided box includes a male head portion (212) of the bonding component. The packaging device also includes a top protection element (214) configured to be placed on a portion of the radio device exposed by the open side of the pentahedral box. The top protection element comprises a female portion (216) of the bonded component and at least one template (218) for attaching at least one assembly component (220) to the radio device. The male and female portions of the bonding component are such that the at least one template is in a desired position for attaching the at least one assembly component when the male portion is inserted into the female portion.

The invention relates to a unified NDK (Named Data Keying) driving architecture with a DSP (Digital Signal Processor) supporting multiple PHYs (Physical Layers) and an implementation method, and the driving architecture realizes flexible adaptation of PHY driving through a three-layer architecture comprising a basic driving layer, an extended driving library and an external driving interface; a three-level elastic framework is used, automatic identification and layered loading are achieved, all IEEE 802.3 Ethernet PHY chips are supported, and compared with a monomer solidification framework and full-manual programming adaptation in the prior art, development is simpler and more flexible, and efficiency is higher. According to the method, a DSP user can directly use the NDK library without recompiling, so that the development difficulty is reduced, and the development time and energy are saved.

A data processing device is provided, including a spectrum extraction circuit configured to receive a first electrode signal and obtain a first component signal having a first preset frequency in the first electrode signal; an amplitude and phase extraction circuit, electrically connected to the spectrum extraction circuit, configured to generate a differential phase-shift keying signal, the differential phase-shift keying signal includes a real part of phase and an imaginary part of phase of the first component signal; a demodulation circuit, electrically connected to the amplitude and phase extraction circuit, configured to demodulate the differential phase-shift keying signal according to a phase angle to obtain data information in the first electrode signal, the phase angle is an arctangent value of a ratio of the real part of phase to the imaginary part of phase.

This invention discloses a DPSK receiver for adapting to the defect of undesirable carrier frequency variation over time in the presence of a transmitter. The aim of providing an apparatus and method for adapting the receiver to transmitter defects is thus achieved. The frequency offset estimation unit includes a first phase estimation unit, a second phase estimation unit, and a clean / dirty selector, wherein a first phase error estimate e is output. dirty (k) The first phase estimation unit includes a first frequency offset estimation low-pass filter, the bandwidth of which is wider than the bandwidth of the second frequency offset estimation low-pass filter in the second phase estimation unit. The second phase estimation unit outputs a second phase error estimate e. clean (k), the dirty / clean selector is configured to compare the ratio of the second phase error estimate to the first phase error estimate with a threshold T and output a binary comparison result c(k). The demodulation reference estimation unit includes a first filter and a second filter, wherein the filter bandwidth of the first filter, which is part of the “dirty” reception path of the receiver, is wider than the filter bandwidth of the second filter, which is part of the “clean” reception path of the receiver. If the ratio of the second phase error estimate to the first phase error estimate is lower than the threshold T, the “clean” reception path is used to output the received information bits; otherwise, the “dirty” reception path is used.

To solve the problem that in a case where a plurality of detection means is installed in an integrated structure such as a conduit pipe and an elastic wave or the like is observed for a purpose of specifying a leakage location or the like, a large amount of cost and labor are spent on calibration of time information between the detection means, so that it is desired to realize an inexpensive and highly accurate time synchronization method and to automatically perform distance measurement of each detection means.SOLUTION: In addition to information to be a target in detection means, a standard time radio wave or the like is received and managed as integrated information, and time series information of data observed by each detection means is corrected based on the time information. Analysis close to real time is performed by using a 260 MHz band being a band of disaster prevention administrative radio for transmission of each detection means and its observation data. An artificial elastic wave is generated by keying, and distance between the detection means is calculated.SELECTED DRAWING: None

Provided in the present disclosure are an information configuration method and apparatus, and a processor-readable storage medium. The method comprises: a first device acquiring at least one piece of configuration information, which is used for determining an on-off keying (OOK) waveform of a first signal and / or a second signal, wherein the first signal is used by the first device to acquire wake-up information, and the second signal is used by the first device to acquire at least one of synchronization information, measurement information and cell index related information.

An efficient structure and methodology are provided for coherent signal processing in optical access networks. Differential phase-shift keying (DPSK) modulation is used for coherent passive optical networks. The use of DPSK modulation can reduce the complexity of a receiver of an optical network unit by improving the receiver tolerance to frequency offsets. A system can comprise an optical line terminal having a coherent transmitter configured to transmit an optical signal over an optical fiber channel to a coherent receiver in an optical network unit of a passive optical network, and a DPSK modulator coupled to the coherent transmitter to code the optical signal transmitted. The coherent receiver of the optical network unit of the passive optical network can be coupled to a DPSK demodulator.

Methods, systems, and devices for wireless communications are described. The described techniques may enable a receiving device to de-map a set of mapped bits by selecting, for a point on a received signal, a subset of constellation points of a constellation with which to perform a soft decision. The subset of constellation points may include a closest constellation point to the point on the signal, an origin of the constellation, one or more constellation points that are a same distance from an origin of the constellation as the closest constellation point with different angles from an axis of the constellation, or a same angle from the axis of the constellation as the closest constellation point with different distances from the origin of the constellation, and a constellation point that is opposite to the closest constellation point in the constellation.

The invention provides an information configuration method and device and a processor readable storage medium. The method comprises the steps that first equipment obtains at least one piece of configuration information used for determining an on-off keying (OOK) waveform of a first signal and / or a second signal; wherein the first signal is used for the first device to obtain wake-up information, and the second signal is used for the first device to obtain at least one of synchronization information, measurement information and cell index related information. According to the invention, the problem of how to configure the first signal and / or the second signal generated based on the OOK waveform at present can be solved.

The invention discloses a method and a device used in a node of Internet of Things communication in wireless communication. The node receives the first information block; a first PRDCH is sent, and the first information block configures the first PRDCH; the first PRDCH adopts an OOK (On-Off Keying); the transmitting power value of the first PRDCH is equal to the smaller value of the comparison between the maximum output power value and the first transmitting power value, and the maximum output power value depends on the power level of a sender of the first PRDCH; the first transmitting power value is linearly related to a target power control parameter value, and the target power control parameter value depends on whether the first PRDCH carries L1 control information or not and the number of OOK time units included in an OFDM symbol occupied by the first PRDCH in a time domain. The power control is optimized, and the transmission quality is improved.

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.

A Dry-Mate Connector System (DMCS) is capable of a direct and convenient connection / disconnection of standardized Commercial Off-The Shelf (COTS)-compatible data communication cables and connectors with submersible electronic equipment for transmission of data / signals / power therebetween, and is suitable for indefinite submersion, as well as adaptable to full ocean depth. DMCS is equipped with sealing elements, a keying / alignment mechanism for proper alignment of COTS connectors for mating the portions, a locking mechanism to ensure the portions remain locked and pressure sealed, and a dummy plug for sealing the connector when not in use. Functional dummy plugs are contemplated to broaden the functionality.

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.

The invention discloses a wireless energy transmission and data communication system. An alternating current input end comprises a resonance network; the switch module is connected to the two ends of the resonant capacitor and is used for switching a zero-voltage output mode or an active rectification mode of the wireless energy transmission system by switching on or off the resonant capacitor; the active rectification module comprises a power tube and a voltage comparison module, and the voltage comparison module controls the on-off of the power tube by comparing the voltage of the AC input end with a preset threshold value; the control module comprises a pulse width modulation feedback loop, and the feedback loop dynamically adjusts the duty ratio of the switch module according to the output voltage of the load end; the data modulation module comprises a dual-mode ramp generation unit and a demodulation unit, the dual-mode ramp generation unit realizes load keying modulation of uplink data by adjusting phase switching of ramp signals, and the demodulation unit recovers modulation data by detecting energy signal changes; the output voltage is kept stable in a full-load range; and the peak efficiency is greatly improved compared with a traditional scheme.