43 results about "Wideband communication systems" patented technology

Systems, apparatuses, methods, and computer program products are disclosed for adaptive transmission with improved channel estimation for ultra-wideband communications. An example method includes receiving a set of reference signals. The example method also includes determining, using the set of reference signals, estimated channel error information for a channel. The example method also includes modifying a Signal-to-Interference-plus-Noise Ratio (SINR) based on the estimated channel error information. The example method also includes modifying a channel capacity based on the estimated channel error information. The example method also includes determining channel state information based on the modified SINR and the modified channel capacity. The example method also includes outputting the channel state information.

A method implemented by a first device operating in a communication system includes: obtaining a channel representation of a set of channels between the first device and a second device, wherein the set of channels corresponds to a set of subcarriers, the first device has multiple antenna ports, and the second device has one or more antenna ports; the first device determines one or more communication filters based on at least the channel representation; the first device applies the one or more communication filters to communication on at least one antenna port of the multiple antenna ports of the first device, wherein the communication is performed on the set of subcarriers.

An ultra-wideband (UWB) communication system comprising a transmitter having two antennas and a receiver having a single receive antenna. Respective selected portions of the UWB signal are transmitted by the transmitter via each of the two transmit antennas and are received at the receive antenna. By comparing the phases of the received signal portions, the phase difference of departure can be determined. From this phase difference the known distance, d, between the transmit antennas the Cartesian (x, y) location of the transmitter relative to the receiver can be directly determined.

The application discloses a binary antenna with ultra-wideband and high isolation and a design method thereof, and mainly solves the problem that the bandwidth of the existing traditional antenna is too narrow to adapt to the demand of a wideband communication system. The application comprises a dielectric substrate, a metal floor and two symmetrical cone monopole antennas and a symmetrically designed antenna decoupling matching network (DMN), wherein the DMN is formed by bending eleven groups of transmission lines with fixed length and width, the first seven groups are used for decoupling of the antenna, and the last four groups are used for matching adjustment. Through the DMN, high port isolation (> 20 dB) between the two cone monopole antennas is realized. The DMN designed in the application has high design freedom, and compared with other decoupling technologies, a wider decoupling bandwidth is realized.

The invention discloses a communication method and device, a storage medium and equipment, and relates to the technical field of communication, and the method comprises the steps: in equipment comprising a broadband communication system and a narrowband communication system, when the broadband communication system meets a preset sleep condition, controlling the broadband communication system to enter a sleep state; when the narrowband communication system accords with a predetermined detection condition, switching to a candidate broadband working frequency point of the broadband communication system through the narrowband communication system for signal acquisition to obtain broadband frequency point data; detecting whether a broadband network signal exists on the broadband frequency point data; and if the broadband network signal exists on the broadband frequency point data, waking up the broadband communication system. According to the invention, the broadband communication system in the broadband and narrow converged communication equipment can reliably work as required, and the energy consumption of the broadband and narrow converged communication equipment is reliably reduced.

The present application relates to the technical field of broadband antenna, in particular to a kind of broadband transverse electric and magnetic horn antenna that can be installed on the surface of metal cylinder, it is characterized in that, metal cylindrical carrier, four broadband transverse electric and magnetic horn antennas installed on the surface of metal cylinder, each transverse electric and magnetic horn antenna is mainly composed of radiation structure and ridge, to increase the bandwidth of antenna.Compared with prior art, the bandwidth of antenna is significantly improved by adding ridge structure.Transverse electric and magnetic horn antenna is connected with two nylon isolation columns and metal cylinder through a inverted L type structure.The antenna provided by the present application has the characteristics of wide operating frequency band, good directivity, etc., and is suitable for electromagnetic compatibility test, radar system, field measurement and ultra-wideband communication system.

The invention relates to the technical field of wireless, and provides a cavity-backed circularly polarized antenna. The cavity-backed circularly polarized antenna comprises a resonant cavity, the top layer of the resonant cavity is etched with a radiation structure, and the radiation structure is used for generating an inherent circularly polarized resonance point; at least one resonant structure is arranged in the resonant cavity, the at least one resonant structure is used for generating an additional circularly polarized resonant point, and the at least one resonant structure is electromagnetically coupled with the radiation structure, so that the inherent circularly polarized resonant point and the additional circularly polarized resonant point interact to widen the circularly polarized bandwidth. According to the invention, the axial ratio bandwidth is effectively expanded so as to meet the requirements of a modern broadband communication system.

The invention discloses a photoelectric detector and a photoelectric communication system. The photoelectric detector comprises a substrate and a photoelectric conversion structure, the photoelectric conversion structure is arranged on one side of the substrate in a first direction, and the first direction is the thickness direction of the substrate; the photoelectric conversion structure comprises a plurality of photon absorption layers, the photon absorption layers are arranged in the second direction, the adjacent photon absorption layers make contact with each other, and the second direction is perpendicular to the first direction. When the above scheme is adopted, the plurality of photon absorption layers of the photoelectric conversion structure are arranged along the direction perpendicular to the thickness direction of the substrate, that is, the plurality of photon absorption layers are arranged along the width or length direction of the substrate, and the active absorption region of the photoelectric detector has a large photosensitive surface, so that the coupling efficiency of incident light can be improved; the responsivity of the photoelectric detector can be improved, the bandwidth of the photoelectric detector can be improved, and the requirements of an ultra-wideband communication system can be met.

The invention discloses a multi-dimensional bee colony broadband communication system and method based on space-time, the system comprises a space-time electromagnetic spectrum sensing avoidance suppression module, a self-adaptive channel interference resistance module and an intelligent cooperative channel repair module, the bee colony system designs a communication integrated link, according to different interference sources, the communication integrated link can be matched with the communication integrated link, and the communication integrated link can be matched with the communication integrated link. And the space-time electromagnetic spectrum sensing avoidance suppression module monitors and identifies an interference source environment in a space domain, a time domain and a channel frequency offset, correspondingly extracts interference source characteristics, and cooperatively monitors and adjusts navigation and communication interference at the same time. An interference area, an interference frequency band and an interfered signal segment are determined by analyzing an interference source, a channel navigation integrated link dynamically adjusts a broadband communication modulation coding type and dynamically adjusts a considerable navigation information strategy according to the interfered strength, and meanwhile, an intelligent interference database training model is adopted to identify the interference type, so that the channel navigation integrated link is optimized. An interfered signal is intelligently repaired by adopting a mode of composite synthesis to counteract the interference signal, the channel navigation anti-interference capability of the bee colony unmanned aerial vehicle cluster is improved through a series of measures, and an effective data analysis and performance evaluation basis is provided for a subsequent communication anti-interference experiment of the unmanned aerial vehicle cluster.

The utility model relates to electronic field especially, and it is a kind of filter circuit and filter.The filter circuit includes input port, output port, filter network;Filter network includes first inductance unit, second inductance unit, first capacitor unit, second capacitor unit, third capacitor unit, fourth capacitor unit, first inductive element;The filter network between input port and output port is built by first inductance unit, second inductance unit, first capacitor unit, second capacitor unit, third capacitor unit, fourth capacitor unit, first inductive element, the simple and small design of filter structure is realized, and performance is stable, especially applicable to various small, portable electronic equipment and wideband communication system.

The invention discloses a beam forming method and device for large-scale users, and relates to the field of wireless communication. The method is used for solving the problem that the broadband communication system cannot better optimize the system performance due to the problems of a beam offset effect, a coupling relation and the like existing in an existing beam forming design method of the broadband communication system in a large-scale user scene. According to the method, channel clustering processing is carried out based on channel state information so as to distinguish user channel characteristics of different frequencies; secondly, constructing a joint optimization model comprising a digital beam former, an analog beam former and subcarrier allocation; and finally, solving the joint optimization model through an iterative optimization algorithm to obtain an optimized beamforming matrix and subcarrier allocation scheme.

The invention discloses a double-layer reflecting plate structure for effectively avoiding resonance points of an ultra-wideband oblique polarization array. According to the double-layer reflecting plate structure, resonance is suppressed and radiation characteristics are optimized through a double-layer reflecting plate and gap design. The structure is composed of a plurality of reflecting plate units, and each unit comprises an upper-layer reflecting plate, a lower-layer reflecting plate and a supporting column structure connecting the upper-layer reflecting plate and the lower-layer reflecting plate. Through slot coupling control, cavity height optimization and stepped reflection plate arrangement, resonance points of the ultra-wideband oblique polarization antenna are effectively suppressed, the consistency of a radiation pattern is improved, the cross polarization ratio is increased, and the ultra-wideband oblique polarization antenna is suitable for a high-frequency-band wideband communication system.

The application discloses a communication method, device, storage medium and equipment, relates to the technical field of communication, and comprises the following steps: when a wideband communication system of a device comprising a wideband communication system and a narrowband communication system meets a predetermined dormancy condition, the wideband communication system is controlled to enter a dormant state; when a narrowband communication system meets a predetermined detection condition, the narrowband communication system is switched to a candidate wideband operating frequency point of the wideband communication system to collect signals and obtain wideband frequency point data; whether there is a wideband network signal on the wideband frequency point data is detected; and if the wideband network signal exists on the wideband frequency point data, the wideband communication system is woken up. The application can make the wideband communication system of a wide-narrow integrated communication device reliably work on demand, and reliably reduce the energy consumption of the wide-narrow integrated communication device.

Systems and methods for encoding and decoding ultra-wide band (UWB) communication signals includes encoding by block interleaving at either bit-level or symbol-level following convolutional encoding, and decoding by block de-interleaving UWB symbols or log-likelihood ratios (LLRs) prior to convolutional decoding. Decoding may further include detecting and nulling (or lowering) outlier UWB symbols or LLRs determined to be affected by interference, prior to block de-interleaving.

In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets discontinuously.

The invention discloses a channel estimation method based on a super-large-scale MIMO near-field broadband communication system, and the method comprises the steps: constructing a super-large-scale MIMO near-field broadband communication system model, and constructing a signal model and a near-field broadband channel model based on the communication system model; in the super-large-scale MIMO near-field broadband communication system model, dividing a received signal into M subcarriers, dividing the subcarriers with adjacent frequencies into one group, and calculating an angle-distance bilinear mode matrix of frequency groups; path detection is carried out based on the bilinear mode matrix of the frequency grouping, a sparse support set is obtained, and the sparse support set comprises the optimal support index of the sampling position of the maximum correlation power in each path component; and performing channel recovery based on the sparse support index to obtain a broadband channel matrix of the whole super-large scale MIMO near-field broadband communication system. According to the method, the accuracy and robustness of near-field broadband channel estimation can be obviously improved.

The present invention discloses a method for generating synchronization sequences for low-orbit satellite broadband communications based on linear frequency modulation. The method comprises the following steps: generating up-and-down chirp frequency signals using a fractional slope coefficient of linear frequency modulation spread spectrum modulation; generating up-and-down chirp phase signals using a phase-frequency relationship; generating up-and-down chirp time domain signals using a phase signal index; generating a signaling signal using the slope coefficient and modulation symbol value of the linear frequency modulation spread spectrum; and generating a synchronization sequence frame structure using the generated up-and-down chirp and signaling signal. When applied to a low-orbit satellite broadband communication system, the present invention can achieve time-frequency synchronization in low signal-to-noise ratio and large-scale Doppler frequency shift environments. It can also flexibly adjust the sequence frequency domain position to avoid partial interference in the synchronization channel, thereby improving the anti-interference capability of the synchronization system.

The invention discloses an ultra-wideband communication system packaging structure which comprises a packaging substrate, the packaging substrate comprises a first power supply area and a second power supply area, the first power supply area is used for being connected with a power supply pin of a transceiver circuit, and the second power supply area is used for being connected with a power supply pin of a phase-locked loop circuit. The layout of the first power supply area and the second power supply area meets the requirement that the physical distance between the first power supply area and the second power supply area is maximized; the distance and the size of the high-frequency adaptive conductive connecting pieces are adaptive to the signal wavelength of the ultra-wideband communication frequency band, and the high-frequency adaptive conductive connecting pieces are used for suppressing high-frequency parasitic coupling; and the analog pin area and the digital pin area respectively belong to different physical partitions of the packaging substrate and are isolated from each other through a grounding conductive connecting piece. According to the invention, high-frequency interference suppression is realized by coupling geometric constraint and electromagnetic field regulation and control principles through a space-electromagnetic cooperative isolation design of a packaging level.

In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets discontinuously.

A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.

The invention discloses a channel customization method based on an intelligent metasurface, a medium and a product, and relates to the technical field of wireless communication, and the method comprises the steps: executing a time delay extension calculation operation: receiving a signal which is transmitted to a target RIS by a transmitting end and is reflected by the target RIS through a receiving end of a target channel, and obtaining a received signal; the target RIS refers to a reconfigurable intelligent metasurface which sequentially takes each group of codebooks of L groups of codebooks generated in advance as a current codebook and configures the phase of each reflection unit of the reconfigurable intelligent metasurface of the target channel based on the current codebook; calculating the delay spread variance of the received signal; based on the time delay spread variance of each received signal, calculating a time delay spread variance average value of each reflection unit of the reconfigurable intelligent metasurface under different phase configurations; selecting the phase configuration with the minimum time delay spread variance average value of each reflection unit as the optimal phase configuration of each reflection unit; according to the invention, the channel quality of a broadband communication system can be improved.

The application provides a near field communication user positioning method and device based on beam offset, comprising: a target user feeds back a subcarrier frequency with maximum received signal power to a target base station subarray, the target base station subarray calculates a detection angle of the target user in a local coordinate system where the subarray is located according to the subcarrier frequency; based on the multiple detection angles and a pre-constructed positioning model, an angle estimation result and a distance estimation result of the target user are obtained, and the angle estimation result and the distance estimation result of the target user are taken as a positioning result to complete two-dimensional positioning of the target user; wherein the positioning model is trained by angle samples and distance samples detected by multiple subarrays. The application realizes the effect of positioning a near field user in a wideband communication system under the influence of beam offset with small time overhead.

The invention relates to an airborne equipment uplink resource configuration method, device and equipment, a readable storage medium and a product, and relates to the technical field of wireless communication. The method comprises the following steps: acquiring a service flow demand involved in a ground-air broadband communication system, the total number of base stations and same-frequency interference signals received by uplink of each base station; determining the number of required base stations corresponding to the service flow demand; and determining interfered base station information according to a first comparison result between a preset uplink interfered threshold and the same-frequency interference signal of each base station, according to the total number of the base stations, the information of the interfered base stations and the number of the required base stations, determining a resource configuration strategy of the uplink of the airborne equipment of the ground-air broadband communication system; the resource configuration strategy comprises spectrum resource configuration and transmitting power configuration for the airborne equipment. By adopting the method, the communication interference risk can be reduced.

In some aspects, the disclosure is directed to methods and systems for interference mitigation and cancellation in full duplex amplifiers for cable modem or broadband communication systems. In many implementations, an interference canceller in the downstream path may be provided to equalize composite power on the FDX upstream subbands within a predetermined range of amplitude (e.g. X dB) from the desired downstream signal on the same subband, without affecting the downstream subbands.

The present invention proposes a simulation method, medium and device for a non-stationary MIMO channel of an ultra-wideband unmanned aerial vehicle, specifically: a user inputs configuration parameters; channel simulation parameters related to bandwidth are calculated, including the Rice factor, the number of scattering clusters and the number of sub-paths within the scattering clusters; channel simulation parameters related to geometry are calculated, including the delay and angle parameters of the line-of-sight path, the delay, angle parameters and power parameters of the non-line-of-sight path, the power correction factor related to the attitude and the Doppler phase; finally, the channel simulation output result is obtained by using the calculated channel simulation parameters related to bandwidth and geometry. The present invention proposes a channel simulation method for an unmanned aerial vehicle supporting an ultra-wideband communication system, introducing parameters related to bandwidth, thus being more consistent with the real scenario; the present invention also proposes an accurate calculation method for channel parameters and supports the continuous evolution of a dynamic scenario, and can reflect the channel non-stationarity caused by attitude and frequency changes.

A method of operating a communications system includes receiving a signal at a digital predistorter (DPD), introducing predistortion to the signal using the DPD, and converting the predistorted signal to an analog signal using a digital-to-analog converter having a first bandwidth. The method also includes amplifying the analog signal, sampling the amplified signal using an analog-to-digital converter having a second bandwidth less than the first bandwidth, and extracting coefficients of the DPD from the sampled signal.

A method and apparatus of a first network entity in a wireless communication system supporting ranging capability are provided. One or more ranging cycles in which a ranging control message RCM and ranging assistance data are identified are identified in a ranging block; a RCM including an advanced ranging control information element (ARC IE) is generated, the ARC IE including a ranging method field, wherein the ranging method field includes a value indicating whether the ranging cycle after the RCM is used for ranging assistance information exchange; ranging assistance data is transmitted to a second network entity in the ranging cycle after the RCM when the value included in the ranging method field corresponds to ranging assistance information exchange; and an acknowledgement ACK corresponding to the ranging assistance data is received from the second network entity.

The application provides a broadband control system, a control method and a device. The broadband control system comprises: an RIS array, the RIS array comprising a plurality of RIS sub-arrays; a true time delay control module, configured to apply time delay or phase shift processing to a beam signal input into the RIS array, so that the beam signal output by the RIS array is in a target state; the target state comprises a first state and a second state, in the first state, the beam signal of all frequency bands is directed to the direction of a same terminal; in the second state, the beam signal of different frequency bands is directed to different terminal directions. The application combines the RIS array with the true time delay control module, applies time delay or phase shift to the input beam signal, realizes true time delay or phase shift regulation and control, can effectively solve the problem of aperture effect, and guarantees communication quality. Through frequency band regulation and control of the beam signal, SU-MIMO communication or MU-MIMO communication can be realized.

The invention provides a broadband beam dispersion suppression method and system based on a movable intelligent metasurface. The system comprises a base station and an intelligent reflecting surface, the base station is provided with a movable antenna array, and the intelligent reflecting surface is divided into a plurality of movable sub-arrays; jointly optimizing the position of each antenna in the movable antenna array and the position of each sub-array in the movable sub-array; wherein the joint optimization aims to maximize the minimum user received signal power on the whole frequency band, and meets the movement constraint of the movable antenna and the movable sub-array. The broadband THz communication system assisted by the intelligent reflecting surface is enabled by using the movable device, and the receiving power of each subcarrier at a user is remarkably improved and the dual-beam dispersion effect is almost completely eliminated by jointly optimizing the positions of the movable antenna and the intelligent reflecting surface subarray.

The application discloses an ultra-wideband communication system packaging structure, which comprises a packaging substrate, a first power supply area and a second power supply area, the first power supply area is used for connecting the power supply pin of a transceiver circuit, the second power supply area is used for connecting the power supply pin of a phase-locked loop circuit, and the layout of the first power supply area and the second power supply area satisfies the maximum physical distance between the two; further comprising an electromagnetic isolation barrier, a plurality of high-frequency adaptive conductive connecting pieces, the distance and size of which are adapted to the signal wavelength of the ultra-wideband communication frequency band, and are used for inhibiting high-frequency parasitic coupling; an analog pin area and a digital pin area, which respectively belong to different physical partitions of the packaging substrate, and are isolated through a ground conductive connecting piece. Through the space-electromagnetic collaborative isolation design of the packaging level, the coupling geometry constraint and the electromagnetic field regulation and control principle are combined, and high-frequency interference inhibition is realized.