32 results about "Channel spacing" patented technology

The invention provides an inter-channel crosstalk suppression method in a multi-channel optical module, which aims at the problems of inter-channel interference and signal overlapping caused by wavelength shift in the multi-channel optical module, calculates the wavelength shift by adopting a proportional integral differential control method through collecting the reading of a temperature sensor and the output wavelength data of a laser device in real time, and finally suppresses the crosstalk in the multi-channel optical module. The threshold value is dynamically adjusted in combination with the environment temperature change, and the interference risk index is quantified; the wavelength drift trend is extracted through time sequence analysis, the channel interval adjustment logic is optimized, the filter bank is dynamically configured to improve the signal purity, meanwhile, the wavelength parameter is corrected through the offset compensation value, and the stability is ensured. If the transmission quality requirement is met, configuration parameters are locked, a correction model is matched and optimized through historical data, potential risks are predicted in combination with state estimation filtering, and the logic adaptability is enhanced and adjusted. According to the invention, efficient correction of wavelength drift and interference minimization are finally realized, and the transmission quality and operation stability of the multi-channel optical module are improved.

The utility model provides an automatic frequency hopping image transmission communication system, which comprises at least one host and a plurality of slaves in wireless communication with the host, and the host and the slaves respectively comprise a frequency hopping communication circuit. The frequency hopping communication circuit is composed of a chip which supports the fastest 100 hops per second and is provided with 80 channels, the channel interval is 30 kHz, the self-correlation coefficient is 0.4, the mutual relation is 0.5, the frequency hopping sequence length is at least 80, and the synchronization time is three frames of 10 milliseconds. The host and the slave of the image transmission communication system adopt the chip supporting the frequency hopping technology for communication, single-frequency communication is not used any more, so that interference signals are difficult to aim at specific frequencies to interfere, the stability and the reliability of communication are improved, the chip supporting the frequency hopping technology can send and receive signals at different frequencies, and the communication efficiency is improved. And the influence of signal fading and multipath effect is effectively avoided.

A present disclosure provides a method for designing a microchannel using a channel gap optimal design algorithm and a fuel cell including a separator designed using the same. The fuel cell including the separator designed using the method for designing a microchannel using a channel gap optimal design algorithm can be designed by calculating an optimal channel gap through the algorithm, and through the designed optimal channel gap, temperature reduction of a fluid, temperature distribution, and flow distribution uniformity can be improved.

Techniques pertaining to designs of channelization of the 60 GHz band for next-generation wireless local area networks (WLANs) are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus by communicating with a channelization design of the 60 GHz band having a channel center frequency being equal to (a channel starting frequency+ΔF)+ΔF*channelIndex, with ΔF denoting a half of a channel spacing and with channelIndex denoting a channel index value.

This application relates to the field of optical communication technology, specifically to a dense wavelength division multiplexing (DWDM) structure and optical chip, aiming to solve the technical problem of how to achieve a large-channel, low-crosstalk DWDM structure based on multiple coarse wavelength division multiplexers. To this end, the DWDM structure of this application includes: multiple sets of one-to-one corresponding micro-ring resonators and coarse wavelength division multiplexers, where the resonant wavelength of the micro-ring resonator includes the output wavelength of its corresponding coarse wavelength division multiplexer. Through the interleaving design of the output wavelengths of adjacent coarse wavelength division multiplexers, the channel spacing of the reduced coarse wavelength division multiplexers is achieved. Through the wavelength selection of the micro-ring resonators and the matching design between micro-ring resonators with different center resonant wavelengths and each coarse wavelength division multiplexer, the severe channel crosstalk problem caused by simply interleaving the coarse wavelength division multiplexers is reduced, thus forming a new large-channel, low-crosstalk DWDM structure, solving the problem of severe crosstalk in conventional large-channel DWDM designs.

The invention belongs to the technical field of optical fiber communication and optical devices, and provides an ultrahigh-channel-number orbital angular momentum mode converter utilizing a few-mode optical fiber hybrid structure aiming at the problem that an orbital angular momentum mode converter based on a spiral long-period optical fiber grating has certain limitation on the number of channels or the frequency band covered by the channels at present. The orbital angular momentum mode converter is composed of two sections of graded-index few-mode optical fibers inscribed with spiral long-period fiber gratings and a section of step-index few-mode optical fiber. The orbital angular momentum mode converter provided by the invention can generate ultrahigh orbital angular momentum mode channels under wide bandwidth, and the channel interval can be flexibly controlled by changing the length of the step refractive index optical fiber. In addition, the periods of the two spiral long-period fiber gratings are reasonably designed, and multi-channel orbital angular momentum mode conversion of different orders can be achieved. The device is simple in structure, convenient to manufacture and high in reliability, and has certain practicability.

The application provides an online near-infrared spectrum detection method and system for biomass raw material components, and relates to the technical field of component detection. Firstly, the particle size distribution and the near-infrared spectrum data of the biomass raw material are acquired in real time, and the two types of data are time-stamped and aligned to establish a correlation mapping. Secondly, based on the mapping data, the channel spacing of a multi-channel adjustable distance optical attenuator is dynamically adjusted to generate standardized spectrum data that eliminates particle size interference. Then, by assigning differentiated weights to the characteristic wavebands of each main component, enhanced characteristic spectrum data is constructed. Finally, a multi-output regression model is established using pre-set samples, and the contents of cellulose, hemicellulose, lignin and other components are simultaneously inverted by inputting the enhanced characteristic spectrum data into the model, thereby realizing rapid and accurate online detection of the components of the biomass raw material in the continuous conveying process.

The application discloses a kind of optical fiber data transmission methods and systems based on wavelength division multiplexing, it is related to optical fiber data transmission technical field, the method comprises: constructing the standard wavelength distribution and channel spacing reference distribution of each wavelength channel in wavelength division multiplexing optical fiber network;Real-time detection current wavelength offset and current optical power parameter of each wavelength channel, obtain prediction wavelength offset distribution sequence;According to prediction wavelength offset distribution sequence, standard wavelength distribution and channel spacing reference distribution, calculate the expected crosstalk intensity distribution sequence and expected transmission quality influence distribution sequence between each wavelength channel;Obtain the optimal optical power parameter of each wavelength channel, and carry out crosstalk suppression to the wavelength division multiplexing optical fiber network.The problems of serious crosstalk and unstable transmission quality in the wavelength division multiplexing network of existing optical fiber data transmission technology are solved.

An optical distribution node, ODN, 100 comprises downstream, DS, optical routing apparatus (110) and upstream, US, optical routing apparatus 120. The DS optical routing apparatus comprises DS output ports (112) and a DS input port (114) for receiving wavelength division multiplexed, WDM, DS channels having a first channel spacing. The DS optical routing apparatus (110) is configured to distribute the WDM DS channels into WDM DS channel sub-sets, the WDM DS channels in the sub-sets are non-contiguous and have larger channel spacing, and to route WDM DS channel sub-sets to different DS output ports. The US optical routing apparatus (120) comprises a US output port (122) and US input ports (124) for receiving WDM US channel sub-sets of WDM US channels, the WDM US channels in the sub-sets are non-contiguous and have the larger channel spacing. The US optical routing apparatus is configured to combine the WDM US channel sub-sets, the combined WDM US channels have the first channel spacing, and to route the combined WDM US channels to the US output port.

The invention provides an atomic antenna array system and a cross-band microwave measurement method. The atomic antenna array system comprises a detection light array assembly, a coupling light array assembly, a first dichroic mirror, a first reflector, a second dichroic mirror, a second reflector, an atomic gas chamber module, a local oscillator microwave module and a detection module. The detection light array assembly is used for outputting a collimated detection light beam array. The coupling light array assembly is used for outputting a coupling light beam array of a target distribution configuration. The atomic antenna array system can control the beam array distribution, and dynamically adjust the channel spacing and topological structure configuration of the coupled light beam array according to the target distribution configuration, thereby improving the phase matching of each channel, and achieving the cross-band microwave array detection. Coherent superposition of signals of all channels can be ensured through the detection module, so that antenna large-array enhanced detection is realized. Therefore, the signal measurement sensitivity and the measurement frequency coverage range of the atomic antenna array system can be effectively improved.

This invention discloses a dual-band TR component using a non-circular cluster connector, relating to the field of radio frequency and microwave technology. Specifically, it includes a structural cavity and a non-circular cluster connector. Metal cover plates on both sides of the structural cavity form first and second sealed cavities, each housing a power supply board for one frequency band, a microstrip line, and an RF chip. The non-circular cluster connector includes an outer conductor and an insulator, with one central pin and two central pins fixed inside. Central pin one extends into the first sealed cavity to connect to microstrip line one, and central pins two extend into the second sealed cavity to connect to microstrip line two. This invention enables the simultaneous transmission of three signals using a single non-circular connector, breaking the thickness limitations of double-sided layouts, avoiding the risk of hole breakage due to excessively close connector spacing, and achieving high integration and high isolation with extremely small channel spacing.

The invention belongs to the technical field of radar signal processing, and provides a DBF-SAR multi-jammer positioning method and device based on phase search, and the method comprises the steps: carrying out the processing of an echo signal containing interference based on a signal model, and obtaining a system receiving signal, the signal model is used for predicting the phase relation between the received interference signal and the lower visual angle of the jammer; the echo signal containing interference comprises a signal transmitted by at least one jammer; converting the system receiving signal into a time-frequency domain to obtain a time-frequency domain signal, and sequentially separating and extracting interference in the time-frequency domain signal to obtain interference signals received by different channels; and establishing an optimization model according to the phase difference of the interference signals received by the different channels so as to determine the distance direction position of each jammer. According to the method, the channel cancellation principle is utilized, the limitation of channel spacing is broken through, and high-precision positioning of the multiple jammers is achieved.

A semiconductor device including a stack structure including gate layers and interlayer insulating layers spaced apart in a vertical direction, a channel hole penetrating the stack structure in the vertical direction, a core region extending within the channel hole, a channel layer disposed on a side surface of the core region, a first dielectric layer, a data storage layer and a second dielectric layer, which are disposed between the channel layer and the gate layers, and a pad pattern disposed on the core region, in the channel hole, and in contact with the channel layer. A first horizontal distance between a side surface of a first portion of an uppermost gate layer and an outer side surface of the channel layer is greater than a second horizontal distance between a side surface of a second portion of the uppermost gate layer and an outer side surface of the pad pattern.

The invention discloses a batch detection system and method for electronic ink screen driving substrates, and relates to the technical field of electronic circuit testing. The system comprises an integral contact electrode, a reference impedance unit, a switching control module and a measurement analysis module. The switching control module selects to apply a reference signal to a single channel or an integral contact electrode, and cooperates with the reference impedance unit to respectively realize short circuit detection of an isolation state between channels and resistance detection of a conduction state of each channel. By adopting a large-area soft contact mode, the detection efficiency is high, the flexible circuit is not damaged, and the measurement result is accurate and reliable.

Example embodiments of the present disclosure are directed to component carrier (CC) transmission for power spectral density imbalance A method comprises receiving, from a second apparatus, configuration information for testing at least one of maximum output power reduction for carrier aggregation or additional maximum output power reduction for carrier aggregation; determining, based on the configuration information, a first number of resource blocks (RBs) for a first CC and a second number of RBs for a second CC, a gap between the first number of RBs and the second number of RBs being larger than a nominal channel spacing, and the first number being different from the second number; and performing, simultaneously, a first transmission to the second apparatus via the first CC using the first number of RBs and a second transmission to the second apparatus via the second CC using the second number of RBs.

The invention relates to the technical field of optical fiber sensing demodulation, in particular to a fiber bragg grating demodulation system based on phase modulation and an arrayed waveguide grating. A narrow linewidth laser of the system is used for generating an optical signal; the optical circulator is used for transmitting an optical signal to the fiber bragg grating sensor and receiving reflected light; the high-speed phase modulator is used for performing phase modulation on the reflected light to generate an optical frequency comb; the multi-channel array waveguide grating is used for dispersing light with different spectral components in the optical frequency comb to corresponding output channels according to wavelengths; the photoelectric detection array is used for detecting the optical power of the output channel and converting the optical power into an electric signal; and the digital signal processing unit is used for collecting the electric signals, comparing the electric signals with the calibration database and demodulating the central wavelength of the fiber bragg grating sensor. According to the invention, the defect that the traditional array waveguide grating demodulation method is limited by channel spacing and is difficult to realize high resolution is overcome, and the demodulation precision is improved.

Absorbent product including a laminate of at least two plies, wherein the absorbent product has a measured Y-Connected Area parameter greater than 20 and a Surface Channel Spacing of less than 2.5 mm. The absorbent product has high strength and low machine direction stretch.

The invention, which belongs to the technical field of optical communication, discloses an optical receiving assembly comprising a circuit board, an array waveguide grating, a photoelectric detector, a trans-impedance amplifier and a substrate. The circuit board is provided with a first conductive pattern, and the first conductive pattern comprises a plurality of pairs of differential signal lines and a plurality of grounding lines of a receiving end. A second conductive pattern is arranged on the substrate, the second conductive pattern comprises a plurality of pairs of fan-out differential traces and a plurality of fan-out ground wires, the fan-out ground wires are fan-out side by side, a pair of fan-out differential traces is arranged between every two adjacent fan-out ground wires, and the trans-impedance amplifier is electrically connected with the circuit board through the second conductive pattern. The substrate is added between the trans-impedance amplifier and the differential signal lines of the circuit board, and the fan-out differential traces are arranged on the substrate so as to be matched with the channel spacing of the differential signal lines with larger channel spacing on the circuit board, so that the length of the bonding wire can be shortened, the signal crosstalk is further reduced, and the high-frequency performance is optimized.

The invention discloses an optical fiber data transmission method and system based on wavelength division multiplexing, and relates to the technical field of optical fiber data transmission, and the method comprises the steps: constructing standard wavelength distribution and channel interval reference distribution of each wavelength channel in a wavelength division multiplexing optical fiber network; detecting the current wavelength offset and the current optical power parameter of each wavelength channel in real time to obtain a predicted wavelength offset distribution sequence; calculating an expected crosstalk intensity distribution sequence and an expected transmission quality influence distribution sequence between wavelength channels according to the predicted wavelength shift distribution sequence, the standard wavelength distribution and the channel interval reference distribution; and obtaining an optimal optical power parameter of each wavelength channel, and performing crosstalk suppression on the wavelength division multiplexing optical fiber network. The problems of serious crosstalk and unstable transmission quality of a wavelength division multiplexing network in the existing optical fiber data transmission technology are solved.

The invention discloses an optical fiber filter capable of being flexibly designed, and relates to the technical field of wavelength division multiplexers, the optical fiber filter comprises a filter assembly, the filter assembly comprises an incident light processing part, the incident light processing part comprises incident light FA, an incident light lens is fixed at the light output end of the incident light FA, a first transmission grating is arranged at the light output end of the incident light lens, and a second transmission grating is arranged at the light output end of the incident light FA. And a light emitting processing piece is arranged on one side of the first transmission grating. Through the diffraction of the first transmission grating and the design of the input and output first optical waveguide array, multiplexing of various wavelengths can be realized, the waveguide spacing can be smaller than the optical fiber spacing, the number of multiplexing wavelengths can be greatly increased, and the size of the device can be reduced; the bandwidth of each path of filter can be independently and flexibly regulated and controlled by adjusting the waveguide width; by changing the channel spacing, the spacing, the central wavelength and the spacing between the filter channels can be effectively adjusted, so that the design freedom degree and the performance configurability of the filter are remarkably improved.

The invention provides a paging method and device, equipment, a storage medium and a product. The method comprises the steps that different time domain symbols are distributed to all cells based on physical cell identifiers of all the cells, and channel intervals corresponding to the different time domain symbols differ by a preset number of frequency division multiplexing symbols; according to each time domain symbol, broadcasting a corresponding configuration parameter to a terminal in each cell, so that the terminal sends a message to the communication base station with different time domain configurations according to the configuration parameter; receiving a paging message sent by each terminal, the paging message comprising terminal wireless capability information, and determining the terminal of which the terminal wireless capability information meets a preset condition as a target terminal; increasing the paging retransmission times of each target terminal; and adjusting the physical downlink shared channel setting of each cell according to the position and the signal quality of each target terminal. While the access success rate of the target terminal is ensured, the communication resource loss is controlled at a low level, and the paging success rate of the terminal is improved.

The invention relates to a range finding method based on BLE CS, an electronic device and a storage medium, and belongs to the technical field of communication, the method comprises the following steps: establishing a connection with an anchor point based on a BLE terminal, simplifying a BLE CS range algorithm to obtain an optimized range finding algorithm, reading a corresponding channel phase angle based on a channel interval corresponding to a previous range finding distance to calculate a phase difference, and determining the phase difference based on the previous range finding distance; the first distance of the distance measurement is calculated according to the calculated phase difference, the first sentence is judged and the distance measurement result is optimized based on the first maximum distance measurement distance of the theoretical maximum channel interval, and the circuit delay of the phase difference used for distance measurement is removed to obtain better distance measurement precision. According to the invention, the problems of high complexity and large operand of the BLE CS ranging algorithm in the prior art are solved.

The invention provides a three-baseline interferometer direction finding method and device based on data space-frequency transformation, and relates to the technical field of radar signal electronic reconnaissance. The method mainly comprises the following steps of: channelizing and numbering broadband signals; setting a channel spacing, and constructing a receiving signal expression of each antenna; extracting a specified antenna signal data item, and executing digital up-conversion by taking the maximum channel frequency as a target carrier frequency; arranging the signals after frequency conversion according to channel numbers to obtain an initial virtual extension sequence; fusing same-channel data of other antennas to form a perfect sequence; constructing a generalized space steering vector based on the unified carrier frequency, the channel spacing and the discrete angle; and screening an angle corresponding to the maximum amplitude value as a signal arrival direction through correlation operation of the vector and the perfected sequence. According to the method, a complete space-frequency transformation and virtual aperture expansion process is formed, the problems of contradiction between direction finding precision and phase ambiguity, difficulty in broadband signal adaptation and the like can be solved without changing a physical baseline, and high-precision direction finding of broadband signals is realized.

The present invention provides a semiconductor device and a method for manufacturing the same. The method includes the steps of: preparing a substrate and forming a drift region on the substrate; forming a plurality of channel spacing regions in the drift region such that channel regions are formed with spacing between each of the two channel spacing regions; forming a source contact region, a drain contact region and a gate contact region in the drift region, and forming a substrate contact region on the substrate with spacing between it and the drift region, wherein the gate contact region is located between the source contact region and the drain contact region, and the source contact region and the drain contact region are in communication via a channel region. In the solution of the present invention, a plurality of channel spacing regions are formed such that channel regions are formed with spacing between each of the two channel spacing regions, thereby adjusting the width of the channel regions to adjust the pinch-off voltage of the device, ensuring that the device has a sufficiently high on-current when it is turned on, further reducing the on-resistance of the device, reducing the power consumption of the device, and improving the performance of the device.

This application discloses an automatic optimization alignment and spacing calibration system and method for multi-channel optical coupling, relating to the field of multi-channel position error calibration. The system includes a high-precision six-dimensional adjustment platform supporting the multi-channel optical chip to be coupled. A central control and data processing unit selects a reference channel, controls the platform to move to the coupling search starting pose, and initiates an automatic optimization program for six-degree-of-freedom step scanning. An optical power detection unit collects the coupling output power value for each pose. The central control and data processing unit compares the power values ​​and records the pose corresponding to the maximum power value as the optimal coupling pose coordinates for the current channel. The control platform moves from these coordinates to the coupling search starting pose of the target channel, executes the automatic optimization program, and sequentially records the optimal coupling pose coordinates for each target channel. Based on all optimal coupling pose coordinates, channel spacing calibration results are generated. This application can simultaneously complete high-precision calibration of the actual spacing between channels while automatically optimizing alignment.

The application relates to a sweep frequency method, a detection method and a device based on an HPLC dual-mode wireless system, and belongs to the technical field of power line carrier communication and wireless communication, and comprises the following steps: determining that the current wideband channel environment is a DTMB channel environment; determining a subchannel number list in a DTMB channel interval according to a DTMB channel opening condition; sequentially performing sweep frequency processing on the subchannel number list in the DTMB channel interval, and when a subchannel that can be accessed is detected, the sweep frequency ends; otherwise, a center frequency point list of the DTMB channel is determined according to the DTMB channel opening condition; sequentially performing sweep frequency processing on the center frequency point list of the DTMB channel, and when a subchannel that can be accessed is detected, the sweep frequency ends. The application can improve the sweep frequency efficiency by preferentially performing sweep frequency on the subchannel number list in the DTMB interval and then performing sweep frequency on the center frequency point list of the DTMB channel; and the application can efficiently and accurately obtain a communication mode of the coincident subchannel number according to the channel correlation of the LTF.

The invention discloses an electric power communication network intelligent scheduling method and device and a medium, and belongs to the technical field of electric power communication, and the method comprises the steps: obtaining an optical fiber connection point data output stress distribution diagram, judging an area with the stress concentration width exceeding a preset threshold value, predicting the nonlinear growth characteristics of insertion loss, the method comprises the following steps: determining a channel position with a reduced signal-to-noise ratio and probability distribution with an increased bit error rate, obtaining signal data transmitted by an optical fiber link, processing the signal, outputting a balanced signal, adjusting channel interval configuration data, obtaining a modulation format of each channel, determining a transmission efficiency balance point under the influence of a stress fatigue factor, and sending the transmission efficiency balance point to the optical fiber link. And determining the variation range of the spectrum efficiency, obtaining a target power allocation scheme by combining the signal-to-noise ratio and the modulation format of each channel, updating configuration parameters, and optimizing the link transmission performance. Through intelligent prediction of optical fiber stress damage and dynamic adjustment of channel parameters and power distribution, adaptive optimization of transmission efficiency and reliability of an electric power communication network is realized.

Absorbent product including a laminate of at least two plies, wherein the absorbent product has a measured Y-Connected Area parameter greater than 20 and a Surface Channel Spacing of less than 2.5 mm. The absorbent product has high strength and low machine direction stretch.

The application discloses a PCM heat exchanger flow channel type selection optimization method and device, and is implemented according to the following steps: S1, obtaining the logarithmic mean temperature difference of the whole PCM heat exchanger according to the preset plate heat exchanger shape size, import and export air temperature and phase change point temperature of the PCM phase change material, and establishing an energy equation based on the logarithmic mean temperature difference; S2, solving the energy equation by using a numerical iteration method, and obtaining the flow channel design parameters most meeting the conditions by using a difference matrix; S3, obtaining a thermal performance factor according to the flow channel design parameters, repeating the above step S2 for different air flow channel spacings, obtaining multiple groups of air spacing and corresponding PCM heat exchange plate thickness combinations, and obtaining the optimal flow channel design parameters according to a thermal performance factor matrix, in combination with the range limitation of the air spacing and the corresponding PCM heat exchange plate thickness. The application solves the problems of low utilization efficiency of the phase change material and low energy conversion efficiency of the PCM heat exchanger designed by the current design type selection optimization method.

The application provides a wireless communication method and a wireless communication device, and relates to channelization design of a 60GHz frequency band of a next-generation WLAN. The wireless communication method can include: a processor of a first device and a second device performing wireless communication in a 60GHz frequency band, the wireless communication including at least one of the following: sending first data or first information to the second device; receiving second data or second information from the second device; wherein the wireless communication in the 60GHz frequency band includes communication by using channelization design of the 60GHz frequency band, wherein a channel center frequency of the channelization design of the 60GHz frequency band is (channel start frequency + ΔF) + ΔF*channel index, wherein ΔF is half of a channel interval, and the channel index represents a channel index value.