154 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.

A 4 frequency-shift keying (4FSK) transceiver is provided. The 4FSK transceiver includes both a 4FSK transmitter and a 4FSK receiver. The 4FSK transmitter includes a voltage-controlled oscillator (VCO) and two data links coupled to the VCO for delivering two parallel streams of input data bits to the VCO. For each pair of parallel input data bits received from the two data links, the VCO outputs a modulated signal having one of four operating frequencies via 4FSK modulation. Separately, the 4FSK receiver includes a power divider, for dividing the multi-frequency modulated signal into two paths of two binary bit streams, and a pair of low-noise amplifiers (LNAs) separately coupled to the two paths and configured as a pair of band-pass filters for filtering two different subsets of the four operating frequencies from the two binary bit streams into two filtered binary bit streams.

The invention discloses a method and a device used in a node of Internet of Things communication in wireless communication. A node sends a first PRDCH, and the first PRDCH adopts an OOK (On-Off Keying); wherein the first PRDCH comprises L1 control information, candidate formats of the L1 control information included in the first PRDCH at least comprise a first format and a second format, and the first format and the second format respectively aim at different device types of receivers of the first PRDCH. The number of control information bits included in the first format and the number of control information bits included in the second format are different, and only the L1 control information of the second format in both the first format and the second format includes device type information. According to the method, the scheduling flexibility is improved, and the implementation complexity 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.

Keying may be used to indicate various features of cables, cable connectors, and / or equipment. The keying mechanisms of the connectors systems disclosed herein identifies whether each plug is a pinned plug or a pinless plug. The keying mechanisms disclosed herein identify the number of optical fibers terminated at each plug. For example, one type of keying mechanism may indicate a cable plug manufactured under a 40 Gb / sec standard and another type of keying mechanism may indicate a cable plug manufactured under a 100 Gb / sec standard. The keying mechanisms may indicate a cabling / wiring pattern to be used (e.g., indicates a polarity of the cable). The cables and / or plugs may be color coded based on the keying mechanism. Accordingly, the keying may alert a user to the features of the cable that are not readily apparent upon a cursory inspection.

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.

The present invention discloses a power information cooperative modulation method based on a buck DC converter, and relates to the technical field of power information cooperative modulation. The present invention combines the structural characteristics of the three-phase staggered parallel buck DC converter itself to perform power information cooperative modulation, utilizes the inherent phase relationship of the three-phase staggered 120° of the three-phase staggered parallel buck DC converter, and changes the amplitude and phase characteristics of the output voltage ripple by adjusting the carrier phase offset to achieve information coding modulation. The present invention realizes the unification of phase-shift keying switching frequency, improves the performance of power transmission and information interaction, and the ripple amplitude fluctuation range is small. When multiple converters are operated in parallel, the converter in the non-communication state can avoid interference with the information demodulation of the communication end converter because the ripple amplitude approaches zero, and there is no need to adopt an orthogonal switching frequency switching strategy, which effectively reduces the system complexity and improves applicability.

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 method for processing a radar signal using Doppler Division Multiplexing, DDM, wherein the radar signal is transmitted from a plurality of transmitters each using a different phase shift keying scheme, wherein the weight of at least one of the different phase shift keying schemes is not a power of two, the method comprising a sequence of steps comprising: Transmitting a radar signal from a plurality of transmitters, wherein the transmission from each transmitter uses a different respective phase shift keying scheme, Receiving a radar signal at a plurality of receivers, each combination of transmitter and receiver representing a virtual antenna; Converting the received radar signal into digital received radar data; Performing a range Fourier transform and a Doppler Fourier transform to convert the received radar data into a range-Doppler data cube having a plurality of bins, each containing a complex numerical value as a function of range and Doppler; and DDM decoding the range-Doppler data cube into received scene data as a transformed data cube having a plurality of bins each containing a complex number value as a function of range, Doppler, and virtual antenna; the method further comprising: a) correcting an angle estimation distortion resulting from phase components injected as a result of the at least one of the different phase shift keying schemes that is not a power of two; b) correcting rotation phases in the values of the transformed data cube resulting from the value of at least one of the different phase-shift keying schemes that is not a power of two; and c) Avoid amplitude distortion caused by interbin misalignment of the ODDM-shifted peaks in the Doppler FFT spectrum.

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 utility model discloses a multiplexing keying circuit for an electric vehicle, which comprises a first receiving module, a second receiving module and a trigger keying module, the trigger keying module is used for generating various control signals, the first receiving module is used for judging the power-on state of the electric vehicle, the Bluetooth state of the electric vehicle and the riding state of the electric vehicle, and the second receiving module is used for receiving the control signals. The second receiving module is used for judging the riding state of the electric vehicle, and the first receiving module and the second receiving module are used for receiving various control signals and controlling the electric vehicle to perform corresponding actions according to the received control signals. Various different control signals can be sent out by pressing the trigger key module, the electric vehicle is controlled through the first receiving module and the second receiving module to achieve different functions, the one-key multi-purpose function is achieved, the number of switch buttons installed on the electric vehicle is reduced, and the simplicity of the switch buttons of the electric vehicle is improved.

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.

The invention discloses a precise deception jamming signal photonics generation method for a synthetic aperture radar (SAR), and relates to the field of optical communication, microwave technology and electronic countermeasure. According to the method, a laser device LD, a dual-polarization quadrature phase shift keying modulator DP-QPSK, a bridge, an arbitrary waveform generator AWG, an optical band pass filter OBPF, an erbium-doped fiber amplifier EDFA, a polarization controller PC, a polarizer Pol and a photoelectric detector PD are included. According to the invention, high-fidelity false target deception can be realized by using only one DP-QPSK modulator, a template signal generation method directly used for a microwave photon frequency conversion system is designed, complex signal processing is not needed, SAR deception jamming signals can be generated through one photon mixing, the signal processing complexity is reduced, and the signal processing efficiency is improved. The method is simple in structure, good in real-time performance and high in parameter reconfigurable capability, a false target image is highly similar to a real target, effective cheating can be achieved, the method conforms to the future development trend of an electronic countermeasure system, and the method has application value in the fields of future radar electronic warfare and the like.

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.

The invention discloses a microwave terahertz wave modulation method for medical imaging, which comprises the following steps that: a transmitting end generates a terahertz carrier signal through a frequency multiplication technology, and removes irrelevant frequency components by using a band-pass filter; a baseband signal and a terahertz carrier signal are modulated, and a Gaussian noise and temperature noise module is combined to simulate a transmission environment; a receiving end recovers the baseband signal through band-pass filtering, demodulation, low-pass filtering and quantization judgment, and carries out signal reconstruction and comparison; the method is used for constructing a biological medium model according to dielectric constant characteristics of biological tissues in a terahertz frequency band, and simulating the propagation process of signals in the biological tissues, including attenuation, dispersion and scattering phenomena. The method provided by the invention has the following advantages: (1) high-precision modulation and demodulation of terahertz carrier signals under complex conditions can be realized; (2) the method is used for a biological medium model, effectively simulates the propagation law of signals in biological tissues, and adapts to the influence of dielectric properties of different tissues; (3) binary amplitude keying (2ASK) modulation is adopted, the system is simple in design and easy to realize, and the demodulation process is high in precision; (4) the system simulation is simple for the establishment of a hardware system, and is convenient for practical engineering application; and (5) the robustness of signal reconstruction is improved, a noise interference environment is adapted, and the accuracy and stability of signal transmission are ensured.

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.