48 results about "Receiver Bandwidth" patented technology

The invention discloses an unmanned aerial vehicle wireless signal automatic extraction and amplitude comparison direction finding method based on spectrum data, and relates to the technical field of wireless communication and direction finding, an 8-channel uniform circular array receiving system is adopted, a specific frequency band is scanned, after spectrum data is preprocessed, a time-frequency graph is generated based on short-time Fourier transform, a spectrum peak is extracted through an Otsu algorithm, and the spectrum peak is extracted through an amplitude comparison algorithm; after unmanned aerial vehicle signals are recognized and parameters such as power and frequency deviation are calculated in combination with dynamic time warping and a deep learning classifier, a power ratio matrix is constructed, an azimuth angle is calculated according to a uniform circular array directional diagram function and optimized and calibrated, a track is smoothed through Kalman filtering, and the system has adaptive interference suppression and can adjust receiving bandwidth in real time and start a notch filter. According to the method, through full-process technical innovation, the wireless signal extraction precision and direction finding reliability of the unmanned aerial vehicle in a complex environment are remarkably improved, missing detection and false detection are reduced, and the method has good environment adaptability and anti-interference capability.

According to various embodiments of the present disclosure, a method performed by a first device includes the steps of: transmitting information of a first system bandwidth including a plurality of first occupied bandwidths or a plurality of first transmission bandwidths to a plurality of second devices; and transmitting a signal to the plurality of second devices on the basis of the first system bandwidth, wherein, on the basis of the first system bandwidth being related to inter-channel frequency hopping (FH), the system bandwidth is configured to be smaller than or equal to a first reception (Rx) bandwidth related to the plurality of second devices.

There is provided a user apparatus configured to receive bandwidth information from a first base station and a second base station, and select one of a first mode and a second mode as an operation mode by using the bandwidth information, in which the first mode is a mode in which a capability of the user apparatus is limited compared to a capability of a first other user apparatus connecting to the first base station, and the second mode is a mode in which the capability of the user apparatus is not limited compared to a capability of a second other user apparatus connecting to the second base station.

The present invention discloses a detector chip assembly for high-speed optical signal reception, comprising: a detector chip; a TIA; at least two leads connected to the output end of the TIA for connecting to an external circuit; a capacitor located between the detector chip and the TIA; one end of the capacitor being grounded together with the detector chip; the capacitor being connected in parallel with the TIA; and at least two sections of gold wires, a first gold wire connecting the detector chip and the capacitor, and a second gold wire connecting the capacitor and the TIA. The detector chip of the present invention converts the received high-speed modulated optical signal into an electrical signal, and the electrical signal is input to the TIA through an inductor and a capacitor and then input to the external circuit through the leads after being amplified by the TIA. By selecting appropriate inductors and capacitors, the present invention can greatly increase the effective reception bandwidth of the detector chip, thereby realizing the reception of high-speed optical signals by using low-cost and low-bandwidth detector chips.

Methods and apparatuses for downlink and uplink transmissions in full-duplex systems. A method for operating a user equipment (UE) for receiving a physical downlink shared channel (PDSCH) includes receiving: first information for a first modulation and coding scheme (MCS) table associated with a first frequency-domain subband in a reception bandwidth on a cell, second information for a second MCS table associated with a second frequency-domain subband in the reception bandwidth, and third information for a condition. At least one of the first and second frequency-domain subbands is one of a subband full-duplex (SBFD) downlink (DL) subband, an SBFD flexible subband, or an SBFD uplink (UL) subband. The method further includes determining whether the condition is valid for reception in a slot or symbol and receiving the PDSCH in the slot or symbol based on the first MCS table when valid and the second MCS table when not valid.

The invention discloses a self-adaptive carrier frequency point and bandwidth filtering noise reducer and a method thereof. The method comprises the following steps of: dividing the whole receiving bandwidth of a receiver into N segmented frequency spectrums; calculating N noise power thresholds corresponding to the N segmented spectrums, and setting cascaded N noise elimination modules according to the N segmented spectrums and the N noise power thresholds; the method comprises the following steps: inputting carrier data into cascaded N noise elimination modules, filtering an ith segment frequency spectrum through an ith noise elimination module to obtain ith segment frequency spectrum filtering data, calculating the average power of the ith segment frequency spectrum filtering data, comparing the average power with an ith preset noise power threshold value, if noise is judged, subtracting the noise from the original carrier data, and if the noise is not judged, subtracting the original carrier data from the ith preset noise power threshold value; and if the ith section of spectrum data contains signal data, reserving the signal data, and directly outputting the input signal of the ith noise elimination module as the input signal of the (i + 1) th noise elimination module. According to the method, the noise can be effectively reduced in a self-adaptive manner under the condition that the carrier frequency point and the bandwidth are unknown.

A computerized simulation system includes a digital receiver emulator that applies over-sampling and multiplexing to in-phase and quadrature (I-Q) data streams to create a composite I-Q signal stream that represents a signal environment in a bandwidth wider than that of an assumed digital receiver bandwidth, applying a band-limiting filter to reduce the signal bandwidth so as to match the digital receiver bandwidth, and decimating the I-Q signal to match the data rate of the simulated digital receiver. The digital receiver can accurately emulate effects of band-adjacent signals that may be adjacent or overlap with the receiver passband, considering the characteristics of low-pass filters used in real-world receivers. The simulation system may be part of a training system that presents a simulated signal environment to a trainee.

A user equipment (UE) transmits, to a network device, a first uplink (UL) reference signal (RS) on a first component carrier (CC) and a second UL RS on a second CC. The first and second UL RSs are transmitted without using digital pre-distortion (DPD), and the first and second CCs form part of a reception bandwidth of the network device. The UE receives, from the network device, a first indication of whether DPD is enabled or disabled for performing subsequent UL transmissions on the first CC, wherein the first UL RS is used for determination of the first indication. The UE performs subsequent UL transmissions on the first CC with or without using DPD based on whether DPD is indicated as enabled or disabled on the first CC. The UE receives, from the network device, a second indication of whether DPD is enabled or disabled for performing subsequent UL transmissions on the second CC, wherein the second UL RS is used for determination of the second indication. The UE performs subsequent UL transmissions on the second CC with or without using DPD based on whether DPD is indicated as enabled or disabled on the second CC.

A method of sharing a frequency between base stations, which is performed by a specialized base station having at least some specialized coverages inside a general purpose coverage of a general purpose base station, may comprise: receiving information about adjacent base stations including the general base station from a mobile edge core network configured to manage the specialized base station; requesting, by the specialized base station, necessary bandwidth parts from the mobile edge core network; receiving allocation information for the bandwidth parts from the mobile edge core network; and setting the bandwidth parts based on the allocation information, wherein the specialized base station provides a specialized service to a specialized terminal in the specialized coverage according to the set bandwidth parts.

A receiver receives a wireless signal comprising a plurality of fields including a legacy short training field (L-STF), legacy long training field (L-LTF), and legacy signal (L-SIG) field transmitted to a plurality of antenna of the receiver. For each sub-band in a receiver bandwidth and when samples of the L-STF is received, a first angle based autocorrelation is performed to determine a group of sub-bands which maximize a magnitude based on the first autocorrelations for one or more sub-bands. For each sub-band in the receiver bandwidth and when samples of the L-LTF is received, a second angle based autocorrelation is then performed to refine the crude bandwidth pattern estimate. One or more signal fields and one or more data fields of the received signal are decoded based on the refined bandwidth pattern estimate.

The invention discloses a data sending method and device, computer equipment and a storage medium, and relates to the technical field of data transmission, and the method comprises the step of dynamically adjusting the data transmission frequency according to the signal states of two clock domains. And if the receiving bandwidth of the first interface is relatively low, when it is detected that the signal values of the synchronous effective signal and the second effective signal at the target moment are different, the second interface stops sending data, so that the transmission frequency is reduced, the bandwidth requirement of the first interface is met, and data loss is avoided. On the contrary, if the receiving bandwidth of the first interface is high, when the signal values of the synchronous effective signal and the second effective signal at the target moment are the same, the second interface can perform data transmission. According to the technical scheme, the bandwidth of the second interface can be dynamically adjusted to be matched with the bandwidth of the first interface, bandwidth differences of different interfaces can be adapted, data transmission is more stable, and flexible bandwidth matching is achieved.

A computerized simulation system includes a digital receiver emulator that applies over-sampling and multiplexing to in-phase and quadrature (I-Q) data streams to create a composite I-Q signal stream that represents a signal environment in a bandwidth wider than that of an assumed digital receiver bandwidth, applying a band-limiting filter to reduce the signal bandwidth so as to match the digital receiver bandwidth, and decimating the I-Q signal to match the data rate of the simulated digital receiver. The digital receiver can accurately emulate effects of band-adjacent signals that may be adjacent or overlap with the receiver passband, considering the characteristics of low-pass filters used in real-world receivers. The simulation system may be part of a training system that presents a simulated signal environment to a trainee.

This specification presents a discontinuous reception operation method, characterized in that: in a wireless communication system, a terminal configured with multiple cells performs physical downlink control channel PDCCH monitoring during an active duration; receives bandwidth part BWP setting information, where the BWP setting information notifies a specific BWP; receives a PDCCH based on the PDCCH monitoring, where the PDCCH includes sleep indication information for a specific cell among the multiple cells of the terminal; and activates the specific BWP based on the sleep indication information indicating non-sleep.

The present invention relates to the technical field of ring transducers, and particularly relates to a design method for a multi-excitation broadband ring transducer with a low water permeability coefficient and a low sound insertion loss. By using two rings with the same outer diameter and height but different inner diameters, they are made to operate at two different frequencies f1 and f2 respectively; when in use, the two rings are connected in series or in parallel, and the resonance frequencies of the two rings themselves are coupled to expand the receiving or transmitting bandwidth. In the state where the two rings are connected in series, the anti-resonance frequencies of f1 and f2 are coupled to expand the receiving bandwidth. In the state where the two rings are connected in parallel, the resonance frequencies of f1 and f2 are coupled to expand the transmitting bandwidth; through the design method, the purpose of multi-excitation coupling to expand the bandwidth is achieved while the external dimensions of the transducer remain unchanged.

A user equipment (UE) transmits an uplink (UL) reference signal (RS) to a network without using digital pre-distortion (DPD). The UE receives, from the network, an indication of whether DPD is enabled or disabled for performing the UE’s subsequent UL transmissions, wherein the transmitted UL RS is used for determination of the indication. The UE performs its subsequent UL transmissions with or without using DPD based on whether DPD is indicated as enabled or disabled. The UL RS may be transmitted over a frequency portion of a reception bandwidth of the network, and wherein a location and a width of the frequency portion are tailored so as to allow the network to characterize an Adjacent Channel Leakage Ratio (ACLR) of the UE within the reception bandwidth. The network may, in response to a change in UE UL transmit power, request the UE to transmit the UL RS without using DPD. When DPD is disabled, it may be disabled for as long as the subsequent UL transmissions are performed with a transmit power value that is lower than or equal to a reference transmit power value with which the UL RS was transmitted.

The present disclosure relates to a radar signal modulator with bandwidth compensation and a frequency offset sequence. For example, a system, method, and circuit device for generating a frequency-hopping radar signal are provided. In one example, the radar signal modulator includes a frequency offset generator, a phase-locked loop (PLL), and bandwidth compensation circuitry. The frequency offset generator is configured to generate a frequency offset sequence. The bandwidth compensation circuitry is configured to combine a modulated signal with the frequency offset sequence to generate a bandwidth-compensated signal. The PLL is configured to receive the bandwidth compensation signal and generate a frequency-hopping radar signal based on the bandwidth compensation signal.

The invention discloses a receiver parameter determination method and device, equipment, a medium and a program product, and belongs to the field of zero power consumption. The method is performed by a zero power consumption device, the method comprising: determining receiver parameters used by the zero power consumption device, the receiver parameters comprising a receiver type and / or a reception bandwidth. According to the method, the receiver parameters used by the zero-power-consumption equipment are determined, and the receiver parameters comprise the receiver type and / or the receiving bandwidth, so that the receiver parameters corresponding to different scenes are determined in different scenes, the actual demand condition is met, and the use flexibility of the zero-power-consumption equipment is improved.

A signal acquisition unit acquires a reception signal received by a reception device from a transmission device that moves relative to the reception device. A bandwidth specifying unit specifies a reception bandwidth that is a bandwidth of the reception signal. A shift specifying unit specifies a change amount of a Doppler shift per time on the basis of a difference between a bandwidth of a transmission signal in the transmission device and the reception bandwidth. A compensation unit compensates for a change of the Doppler shift of the reception signal on the basis of the change amount specified.

The application relates to the technical field of wireless communication, and discloses a free space optical and millimeter wave / terahertz fusion transmission system and a working method. The system comprises a transmitter, a base station and a central office. The millimeter wave / terahertz signal is generated by adopting a full-optical up-conversion architecture at the transmitting end, the received millimeter wave / terahertz electrical signal is converted into an optical domain signal at the base station, the optical domain signal is fused with a free space optical signal, the fused optical signal is received by a single optical coherent receiver at the central office, and the fused optical signal is processed. The system is accurately designed in terms of optical frequency relationship, so that the two types of heterogeneous signals fall within the receiving bandwidth of the single coherent receiver, and single-receiver reception is realized. The system supports two working modes of high capacity and high reliability, adopts adaptive demodulation or a hybrid automatic repeat request mechanism based on maximum ratio combination in severe weather conditions, improves transmission reliability, and has the technical effects of reducing system complexity, improving spectrum utilization efficiency, enhancing communication reliability and supporting flexible deployment.

A method of authenticating a received signal comprises receiving signals within a spectrum of bandwidth B, converting the signals into a frequency domain representation of bandwidth B, and segmenting the frequency domain representation of bandwidth B into spectrum segments each of training bandwidth W. For each spectrum segment, the method further comprises applying the spectrum segment to a neural network, and receiving, from the neural network, a radio frequency identification map comprising two or more classification vectors. The method further comprises determining a total variation across the two or more classification vectors and identifying the received signal as authenticated when the total variation is less than a threshold value. The method may further comprise training the neural network using a training dataset of wideband training samples. The method may further comprise generating each of the wideband training samples by stitching together two or more stored signals.

A clutter suppression method uses the local oscillator frequency hopping characteristics of high repetition rate stepping frequency signals, sets the receiver bandwidth and local oscillator frequency hopping interval that meet the conditions, and combines the receiver gating filter to effectively suppress the clutter outside the target echo distance range. Without additional hardware and operation processing, it is convenient to realize, beneficial to subsequent signal processing requirements, improves the visibility level under clutter, enhances the target detection ability, and has good engineering application value.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a bandwidth part (BWP) configuration that indicates a set of BWPs configured for communications by the UE. The UE may then receive a wake-up signal (WUS) monitoring configuration that indicates respective monitoring window offset values, respective time gap values, or both, for the set of configured BWPs (e.g., a per-BWP configuration for the monitoring window offset values, respective time gap values, or both). In some aspects, the respective monitoring window offset values and respective time gap values correspond to boundaries of respective WUS monitoring windows for set of configured BWPs. The UE may then monitor, within each BWP of the set of configured BWPs, for wake-up signaling. The UE may monitor for the wake-up signaling during one or more WUS monitoring occasions within the respective WUS monitoring window for the BWP.

The invention relates to the technical field of wireless communication, and discloses a free space light and millimeter wave / terahertz fusion transmission system and a working method. The system comprises a transmitter, a base station and a central office, a millimeter wave / terahertz signal is generated at a transmitting end by adopting an all-optical up-conversion architecture, a received millimeter wave / terahertz electric signal is converted into an optical domain signal at the base station to be fused with a free space optical signal, and a fused optical signal is received and processed by utilizing a single optical coherent receiver at the central office. The system enables two types of heterogeneous signals to fall into a receiving bandwidth of a single coherent receiver through accurately designing an optical frequency relation, thereby achieving the receiving of the single receiver. Two working modes of high capacity and high reliability are supported, an adaptive demodulation or hybrid automatic repeat request mechanism based on maximum ratio combination is adopted under severe weather conditions, the transmission reliability is improved, and the technical effects of reducing the system complexity, improving the spectrum utilization efficiency, enhancing the communication reliability and supporting flexible deployment are achieved.

A downlink transmission method is performed by a network device and includes: configuring a first control resource set (CORESET) of a physical downlink control channel (PDCCH) for a first type of terminal, wherein a frequency domain width of the first CORESET is greater than a receiving bandwidth of a control channel supported by the first type of terminal.

Provided in the present invention is a method performed by user equipment (UE), the method including: determining a location of a receiving bandwidth according to a configuration parameter; and receiving a signal within the receiving bandwidth, the configuration parameter including a bandwidth location of a synchronization signal block (SSB) and / or a bandwidth location of a control resource set (CORESET).

The invention belongs to the field of nuclear magnetic resonance logging, and particularly relates to an in-situ high-signal-to-noise-ratio small-diameter nuclear magnetic logging system and a design method, and the method comprises the steps: forming a magnetic resonance signal-to-noise-ratio environment item according to environment factors in a detection area; the required magnetic resonance signal-to-noise ratio is set, system parameter items are obtained according to a magnetic resonance signal-to-noise ratio model, and the magnetic resonance signal-to-noise ratio model is the magnetic resonance signal-to-noise ratio, the magnetic resonance signal-to-noise ratio environment item and the system parameter items; selecting system working frequency, system receiving bandwidth and system transmitting power according to the system parameter items; and designing the nuclear magnetic logging system according to the system working frequency, the system receiving bandwidth and the system transmitting power, so that the structure of the nuclear magnetic logging system is matched with the system working frequency, the system receiving bandwidth and the system transmitting power. The nuclear magnetic logging system designed by the design method can obtain a high signal-to-noise ratio under the condition of realizing miniaturization. And the in-situ application effect of the small-diameter magnetic resonance logging equipment is expanded.

The invention discloses an all-optical terahertz envelope detection method, and relates to the technical field of optical terahertz technology and envelope detection, and the method comprises the steps: converting a received terahertz pilot frequency and a target electric signal into a single-side-band optical signal through an ultra-wideband electro-optical processing technology; the upper path adopts a laser injection locking technology to filter a target optical signal and amplify pilot frequency optical power, and the lower path retains the target optical signal through an optical filtering technology; the optical signals of the upper path and the lower path are coupled, the optical signals are converted into intermediate-frequency electric signals through the broadband electro-optical beat frequency technology, and then digital sampling is carried out to recover target communication or sensing information. The invention further discloses an all-optical terahertz envelope detection receiving system. According to the method, the terahertz signal envelope receiving bandwidth can be effectively improved, the problem that the bandwidth of an electronic envelope detector is limited is solved, and the detection sensitivity is improved; in addition, by using the homologous characteristic of the pilot frequency and the target signal, the frequency offset interference of the target signal can be eliminated, and the system complexity is reduced.

A detection device for calcification according to an embodiment of the present disclosure may include a frequency determination unit, an ultrasound transceiver unit, and a band signal processing unit. The frequency determination unit may determine a transmission frequency of a transmitted ultrasound signal. The ultrasound transceiver unit may transmit the transmitted ultrasound signal to an object and receive a received ultrasound signal reflected from the object. The band signal processing unit may filter the received ultrasound signal to extract a calcification signal corresponding to a calcification included in the object. The detection device for calcification according to the present disclosure transmits a transmitted ultrasound signal at a frequency within a band of the ultrasound probe and includes a band signal different from a transmitted signal frequency among smoothed signals reflected from the calcification in a reception bandwidth of the ultrasound probe, thereby more accurately detecting the calcification within the object.