38 results about "Millimeter wave communication systems" patented technology

The invention discloses a sparse interaction beam prediction method fusing perception and communication. The method comprises the following steps: acquiring and preprocessing multi-modal sensing data; feature extraction is carried out on the preprocessed multi-modal sensing data; introducing a learnable potential vector by adopting a Perceeiver-Transform structure, and carrying out cross attention interaction on the learnable potential vector and the spliced sequence, so as to obtain a multi-modal fusion feature; and mapping the multi-modal fusion features to a millimeter wave beam space through a beam domain projection mechanism, generating probability distribution of the beam space, and outputting a predicted optimal beam according to the probability distribution. According to the method, the learnable potential vectors are adopted, sparse interaction and efficient fusion of the multi-modal fusion features are achieved, the sensing features are mapped to the millimeter wave beam space through a beam domain projection mechanism, the calculation amount is reduced, the robustness and prediction precision are improved, and the method is suitable for large-scale popularization and application. And the method is suitable for millimeter wave communication systems in low-altitude unmanned aerial vehicles, Internet of Vehicles and high-dynamic environments.

The invention discloses a packaging antenna module and a millimeter wave packaging antenna. The packaging antenna module comprises a packaging body; the trapezoidal shallow cavity structure is positioned in the packaging body and is used for integrating a chip; the first antenna array is located on the first side of the trapezoidal shallow cavity structure and is arranged on the upper surface of the packaging body; the second antenna array is located on the second side of the trapezoidal shallow cavity structure and is arranged on the upper surface of the packaging body; and the bonding pad array is positioned on the lower surface of the packaging body and is used for connecting a circuit board. According to the embodiment of the invention, the problems of low integration level and insufficient performance of the antenna in the prior art are solved, the packaging antenna performance with low loss, high efficiency and high integration level is realized, and the application requirement of a millimeter wave communication system is met.

The invention belongs to the technical field of high-speed rail communication, and discloses a method for optimizing an intelligent reflecting surface in high-speed rail communication based on discrete phase shift, which comprises the following steps of: constructing a high-speed rail millimeter wave communication system comprising a base station, the intelligent reflecting surface and a plurality of mobile relays; establishing a channel model of each channel in the high-speed rail millimeter wave communication system; deducing a received signal expression of each mobile relay by combining the channel model and the discrete phase shift of the intelligent reflecting surface, and calculating the reachable rate of each mobile relay; establishing a target function by taking minimization of the transmitting power of the base station as a target, and meanwhile, setting constraint conditions to construct an optimization problem; and jointly optimizing the transmission covariance matrix of the base station and the discrete phase shift of the intelligent reflecting surface, and solving an optimization problem through an alternate optimization algorithm to reduce the transmission power of the base station. By adopting the method provided by the invention, the power consumed by the base station is reduced on the premise of ensuring the communication quality of the mobile relay.

The application discloses a kind of FPGA implementation methods for time-frequency synchronization of multi-path parallel transmission millimeter wave OFDM communication system, according to the frame structure of transmission signal physical layer and the number of parallel transmission paths of FPGA implementation time base, training sequence with specific structure is generated in time domain;Correlation operation is carried out on baseband multi-path parallel receiving signal using delay autocorrelation method, and the coarse timing synchronization position is found by the method of flow experience threshold comparison;The angle information carried by autocorrelation result is used to realize the frequency offset estimation calculation of system;The correlation operation is carried out on local cache sequence and receiving signal sequence, and the fine timing synchronization position is obtained;The final system symbol timing synchronization result position index is obtained by adding coarse synchronization and fine synchronization result, and the data sequence after symbol timing synchronization is output;Corresponding complex exponential signal is generated simultaneously, and frequency offset compensation operation is carried out on the sequence after timing synchronization, to complete system synchronization task.The application can improve system synchronization accuracy, reduce hardware implementation time cost and complexity.

A communication system operable in the millimetre-wave spectrum including: a transmitter arranged to emit a transmit millimetre-wave signal, a polymer millimetre-wave fibre arranged to propagate the transmit millimeter-wave signal, a receiver arranged to receive the propagated transmit millimeter-wave signal. The transmitter is arranged to receive an input signal and includes: an in-phase path and a quadrature path for the input signal, modulation means for performing modulation with a millimetre wave carrier signal, amplifier means, combiner means. The in-phase path and the quadrature path each has a pre-equalizing filter to filter the input signal, prior to applying the input signal to the modulator means, amplifier means and combiner means.

The invention provides a combined scheduling method for predicting and enhancing QoS (Quality of Service) sensing millimeter wave beams and power, and belongs to the technical field of wireless communication and resource management. In a millimeter wave system, user equipment periodically measures downlink reference signal receiving power and reports the downlink reference signal receiving power to a base station; and the BS maintains a historical RSRP sequence for each UE, and performs multi-step prediction by using an AI model to obtain a Top-K candidate beam at a future moment and the quality of the Top-K candidate beam. And the base station fuses the prediction result with the queue state, the service type and the QoS constraint, constructs a prediction enhancement state, and jointly optimizes beam selection and power distribution based on a deep reinforcement learning model. According to the method, a neural network does not need to be deployed on the UE side, the problem of channel aging is effectively relieved, the spectrum efficiency is remarkably improved in a high-mobility scene, meanwhile, time delay is reduced, the QoS default probability is reduced, and the method is suitable for a millimeter wave communication system of eMBB, URLLC and mMTC mixed services.

The application discloses a precision-adjustable wideband temperature compensation circuit based on a gallium arsenide process and relates to the technical field of integrated circuits.The circuit comprises a temperature compensation driving module, a temperature compensation attenuation module and a temperature compensation precision control logic module.The temperature compensation driving module senses environmental temperature changes through a clamping circuit and a differential network and outputs an analog control voltage.The temperature compensation attenuation module comprises a plurality of parallel controllable attenuation units, each of which comprises two series-connected transistors, and the on-off of each controllable attenuation unit is controlled by a switch signal of the control logic module and the attenuation amount of each controllable attenuation unit is controlled by an analog voltage of the driving module.The control logic module controls the conduction of different numbers of attenuation units by receiving an external TTL signal, so that the multi-gear adjustment of the overall temperature compensation precision is realized.The application overcomes the shortcomings of the traditional temperature compensation circuit, such as unadjustable precision and narrow frequency band, and has the advantages of wide working frequency band, adjustable temperature compensation precision, compact structure and easy integration, and is suitable for high-performance millimeter wave communication systems.

A phase shifter for a millimeter wave (mmW) communication system, the phase shifter comprising: an in-phase variable gain amplifier (I VGA) and a quadrature VGA (Q VGA) configured to receive a radio frequency (RF) signal, the I VGA and the Q VGA configured to provide selectable outputs to a primary side of a first electromagnetic (EM) element and a primary side of a second EM element, respectively, the first EM element is configured to provide a single-ended I output and the second EM element is configured to provide a single-ended Q output; and a hybrid quadrature generator (HQG) configured to receive a single-ended I output of the first EM element and a single-ended Q output of the second EM element, the HQG configured to provide a combined signal at a desired phase.

The invention discloses a millimeter wave band-pass radio frequency switch circuit, a radio frequency switch and a wireless communication system. The circuit comprises a first transistor, a second transistor, a first inductor and a second inductor, a grid electrode of the first transistor is used for accessing a first bias voltage, a drain electrode of the first transistor is connected with one end of the first inductor, and a source electrode of the first transistor is grounded; the other end of the first inductor is grounded; the grid electrode of the second transistor is used for accessing a second bias voltage, the drain electrode of the second transistor and the drain electrode of the first transistor are connected with the common connection end of one end of the first inductor, and the source electrode of the second transistor is connected with one end of the second inductor. Compared with a traditional low-pass matching network type switch, the band-pass network can move a working frequency band from a low frequency to a high frequency, the stop-band network provides excellent isolation performance, and the low-pass matching network type switch is suitable for a high-frequency-band and multi-system millimeter wave communication system.

This invention provides a wireless communication control method and apparatus utilizing element error fitting of a millimeter-wave array antenna. The method includes: identifying anomalous element positions based on the synchronization relationship between the received signal sequences of each element obtained from the downlink reference signal received by the millimeter-wave array antenna during normal communication, thus obtaining anomalous elements; constructing local spatial response difference features based on the first received signal of the anomalous element in the received signal sequence and the second received signal of the normal element in the received signal sequence; fitting the offset of each anomalous element relative to the ideal element response based on the projection behavior of the local spatial response difference features in the spatial angular domain, thus obtaining the element error morphology; and activating redundant antenna subarrays if the element error morphology indicates that the millimeter-wave array antenna does not meet preset beam pointing conditions. This invention improves the robustness and stability of millimeter-wave communication systems under complex hardware conditions.

The invention provides a broadband wide-angle tight coupling dipole array antenna working at a Ka wave band. The broadband wide-angle tight coupling dipole array antenna is composed of a plurality of antenna units arranged in a matrix mode. Each unit comprises a single-layer Rogers 5880 dielectric substrate, a bottom-layer metal floor, an upper-layer wide-angle matching layer and a tight dipole radiation layer; wherein the tail ends of vibration arms of the bow-tie-type dipole units are mutually overlapped to enhance coupling, the hyperbolic impedance transformers realize conversion from unbalance to balance and broadband matching, the short-circuit metal wires inhibit common-mode resonance, and the wide-angle matching layer is a frequency selective surface formed by rectangular metal patches. Passive edge units are additionally arranged on the two sides of the array, outer side short-circuit lines are removed to slow down the truncation effect, the metal wall and the floor are integrally machined, the active standing-wave ratio within 27.5-35 GHz is smaller than or equal to 2.1 when + / -50-degree scanning is supported, and the efficiency is larger than or equal to 80%. The antenna has the advantages of low profile, high integration, wide bandwidth angle and high radiation efficiency, and is suitable for a millimeter wave communication system.

This application discloses a beam management method and apparatus for environment semantic-assisted communication. It acquires raw image data from a base station camera, uses a generative model for repair and enhancement to generate an enhanced image; employs a lightweight detection network to extract environmental semantics, generating candidate bounding boxes and confidence scores; obtains the current optimal beam measured by the base station through beam scanning, maps it to a spatial azimuth angle, and projects it onto the image plane to obtain the expected position of the target vehicle; performs spatial likelihood matching between the expected position and the candidate bounding boxes, and identifies the target vehicle based on the confidence scores; tracks the target vehicle's trajectory to obtain temporal state information; inputs the temporal state information into a temporal prediction network to predict the future optimal beam and perform beam switching. This achieves all-weather stable beam management for vehicle-to-everything (V2X) millimeter-wave communication systems in low-light nighttime environments, solves the performance gap caused by uneven day-night data distribution, and reduces beam scanning overhead and access latency.

The invention relates to the technical field of unmanned aerial vehicle communication, and discloses an unmanned aerial vehicle millimeter wave communication system assisted by computer vision target perception, comprising a vision perception module used for collecting and processing image data to output two-dimensional position and attitude information of a communication target; the spatial information resolving module is used for fusing the multi-source data to resolve the three-dimensional physical coordinates of the target; the joint optimization decision module is used for solving a joint optimization problem taking maximization of the data transmission quantity as a target based on the three-dimensional coordinates so as to generate an optimal unmanned aerial vehicle flight path and communication power distribution strategy; and the flight and communication control module is used for converting the strategy into a control instruction and executing the control instruction. Through closed-loop integration of visual perception and joint optimization, the unmanned aerial vehicle can autonomously perceive the target position and cooperatively optimize flight and communication resources, the prior dependence on the target position is eliminated, and the establishment efficiency of a communication link and the data transmission performance are remarkably improved.

Techniques are provided for managing transmit and receive beams for bistatic radio frequency (RF) sensing in millimeter wave (mmW) communication systems. An example method of tracking targets using bistatic RF sensing includes receiving one or more sensing reference signals; generating a signal report based at least in part on the one or more sensing reference signals; transmitting the signal report; receiving tracking signal configuration information; receiving one or more tracking reference signals identified in the tracking signal configuration information; and tracking one or more targets associated with the one or more tracking reference signals.

The present invention belongs to the field of wireless communications and relates to a millimeter-wave beam tracking method based on contrastive learning. The method is oriented to a millimeter-wave communication system. In combination with visual and LiDAR information in an environment that are collected by a plurality of sensors installed at a millimeter-wave base station, a machine learning model is used to perform feature processing on data of different modalities, and a multi-modal fusion strategy based on contrastive learning is used to enhance the synergistic effect between data of various modalities, so as to obtain a method for real-time prediction of the current beam and tracking of a plurality of future beams. In the present invention, multi-modal data fusion and contrastive learning are combined for beam tracking, such that the accuracy and stability of beam tracking can be effectively ensured, thereby ensuring the communication efficiency of a millimeter-wave communication system.

The invention relates to a port selection and phase shift joint optimization method for an FRIS enabled millimeter wave communication system, and the method comprises the steps: building a problem model of port selection and phase shift optimization by employing a channel from a base station to an FRIS and a channel from the FRIS to a user, and taking the maximization of the spectrum efficiency between a receiving signal and a sending signal as a target; according to the problem model, constructing a closed-form solution of an FRIS phase shift matrix based on single-port gain; selecting a port with the maximum individual contribution value according to the closed-form solution, and obtaining an optimal port set; the discrete phase of each active port is updated according to the optimal set of ports, and a value that maximizes the reachable rate is selected. By adopting the FRIS, the probability of communication interruption caused by communication blockage can be obviously reduced, and the reliability of a communication system is improved.

The application belongs to the technical field of wireless communication security and signal processing, and discloses a high-reliability device authentication method based on antenna array error characteristics and double-beam transmission, which comprises the following steps: 1, constructing a double-beam, wherein signals received by a user equipment are transmitted through the double-beam; 2, actively tracking the double-beam and adjusting the direction of the double-beam in real time; 3, modeling a statistical analysis model of a radiation mode; 4, defining a radiation mode characteristic extraction target, completing characteristic extraction, and calculating gain error values, phase error values and position error values; 5, calculating signal energy, comparing the signal energy with a preset threshold as an energy detection statistical quantity, judging the legitimacy of a signal source, and completing device authentication. The authentication scheme provided by the application can effectively cope with the influence of array errors, thereby providing a reliable and efficient authentication solution for a millimeter wave communication system and helping to enhance the security of a communication link.

The application provides a user-centered joint optimization method and system of a cell-free MIMO system, and relates to the technical field of wireless communication. The method comprises the following steps: constructing a downlink of a UCCF millimeter wave mMIMO communication system, the mMIMO communication system comprising a plurality of randomly distributed access points AP and user equipment UE, each AP being equipped with a polarized reconfigurable array, and constructing a signal model; based on the signal model, constructing a corresponding channel model; and constructing an initial hybrid beamforming model; based on the channel model, optimizing the channel model with an optimal sum rate as a target; according to an optimal perturbation genetic algorithm, iteratively optimizing an AP-UE clustering matrix A, a polarization mask matrix B of all APs and the hybrid beamforming model to obtain a target joint optimization model. The application solves the problem that the performance of an existing cell-free large-scale MIMO system is limited in a dense user or dynamic network environment.

The invention discloses a broadband high-efficiency millimeter wave CMOS power amplifier, and relates to the technical field of millimeter wave integrated circuits. The amplifier is composed of an input matching circuit, a power amplification core circuit and an output matching circuit, the core circuit adopts a four-stage stacked push-pull Class-B structure formed by complementary NMOS and PMOS devices, the output power is improved through alternate conduction, the channel width of each branch transistor is decreased progressively according to the number of stacked stages, series resonant inductors are arranged between the stacked stages, the inductance value is increased progressively, and the output power is increased progressively. Parasitic capacitance is compensated, group delay balance is guaranteed, and efficiency and gain flatness are improved; and the grid electrode of the stacked transistor is grounded through a capacitor to prevent overvoltage breakdown. The input matching circuit comprises a low-Q inductance-resistance matching network and a multi-stage gradual change impedance matching network, and the output matching circuit adopts the multi-stage gradual change impedance matching network, so that broadband matching is realized, and the loss is reduced; the maximum power additional efficiency reaches 40.2% in the frequency band of 10-40 GHz, the maximum saturation output power is 20.4 dBm, and the broadband millimeter wave power divider is suitable for a broadband millimeter wave communication system.

The present invention discloses a signal receiver and signal receiving method involving nonlinear detection method for mmWave OTFS systems in high mobility scenarios with non-ideal power amplifier, which is applicable in the fifth generation (5G) and beyond networks. The millimeter wave (mmWave) system is envisioned to be a promising candidate of 5G. However, the high frequency and large bandwidth operation in mmWaves result in nonlinear distortions from the power amplifier in the system. The nonlinearly distorted signals from non-ideal power amplifier when propagate through a wideband high mobility channel tremendously degrades the systems performance. Attributed to the non-ideal power amplifier, the nonlinear distortions induce multiplicative distortions and inter symbol interference (ISI) in the OTFS system. It further causes the posterior probability of the transmitted signal non-Gaussian and analytically intractable. The present signal receiver and signal receiving method proposes an amalgamation of maximal ratio combining (MRC) and particle filter in the delay-Doppler domain to retrieve the desired signal from the nonlinearly impaired observations.

The invention discloses generation of a frequency hopping millimeter wave signal with a deception frequency point, and belongs to the technical field of communication. The method comprises the following steps: expanding a seed key shared by a transmitting end and a receiving end into a pseudo random number sequence A, and generating a frequency hopping digital carrier signal; generating a random number sequence B, determining a frequency difference between a deception frequency point and a real frequency point, and generating a deception frequency point digital frequency hopping signal; generating a random number sequence by using a random number generator, and loading a random phase in each frequency hopping interval of the deception frequency point carrier signal to obtain a deception frequency point carrier signal with a disordered phase position; a digital carrier signal and a baseband signal are respectively modulated on an optical carrier which is generated by two lasers and has a certain frequency difference through a DAC and an IQ modulator, and the frequency difference determines a center carrier frequency for finally generating a frequency hopping millimeter wave signal. And the frequency hopping millimeter wave signal with the deception frequency point is input to an antenna through a photoelectric detector to complete emission. And the security of the frequency hopping millimeter wave communication system is improved.

The invention discloses a millimeter wave high-gain filtering transmission array antenna which comprises a horn feed source and a filtering transmission array plane arranged at an interval with the horn feed source, the horn feed source emits spherical waves to the filtering transmission array plane, the filtering transmission array plane comprises a filtering transmission antenna unit array, and each filtering transmission antenna unit comprises a magnetoelectric dipole antenna assembly. The antenna comprises a receiving electric dipole patch and a transmitting electric dipole patch which form an incident array plane and a transmitting array plane respectively, and the transmitting array plane comprises a first transmitting electric dipole patch and a second transmitting electric dipole patch which rotates relative to a mirror image of the first transmitting electric dipole patch according to a preset phase. The antenna has high gain and good aperture efficiency in a passband, the transmission coefficient of the filtering transmission antenna unit has good band-pass filtering response, full coverage of 5G n257 and n258 frequency bands can be achieved, strong out-of-band rejection can be achieved on upper and lower sidebands, and the antenna has the high roll-off characteristic, is simple in structure and low in manufacturing cost and is suitable for a millimeter wave communication system.

The invention discloses an interconnection structure of a millimeter wave packaging antenna module, which relates to the technical field of millimeter wave communication, and comprises an integral packaging structure, a substrate material and lamination structure, a key interconnection structure, performance index and verification, and prototype processing and assembling. Wherein the key interconnection structure specifically comprises a PCB and SiP chip interconnection structure, an interconnection structure between SiP chips, an interconnection structure between SiP and GaAs chips and an interconnection structure between GaAs chips and an antenna array, through a multi-section impedance matching design, matching structures are designed between the PCB and the SiP chips respectively, broadband low-loss transmission is achieved, and the antenna array has the advantages of being simple in structure, low in cost and high in reliability. A double gold wire bonding structure is combined to reduce the parasitic inductance of a GaAs chip bonding wire and improve the matching performance, a bonding point is arranged on a cavity step through a step bonding technology, the length of a gold wire is shortened, the high-frequency loss is reduced, three-dimensional lamination interconnection is utilized, a radio frequency signal can be led to an antenna from a chip through a blind hole and a strip line, and the antenna performance is improved. High-density signal routing is achieved, and the application requirement of a millimeter wave communication system is met.

The application discloses a kind of millimeter wave high gain filter transmission array antennas, comprising: horn feed, filter transmission array array surface being spaced apart with horn feed, horn feed emits spherical wave to filter transmission array array surface, filter transmission array array surface includes filter transmission antenna unit array, filter transmission antenna unit includes magnetoelectric dipole antenna component, it includes receiving electric dipole patch and transmitting electric dipole patch, respectively constitute incident array and transmitting array, transmitting array includes first transmitting electric dipole patch and second transmitting electric dipole patch mirror image rotation relative to first transmitting electric dipole patch according to preset phase.The antenna has high gain and good aperture efficiency in passband, the transmission coefficient of filter transmission antenna unit has good band-pass filter response, can realize the full coverage of 5G n257 and n258 frequency band, and can realize strong out-of-band suppression in upper and lower sideband, with high roll-off characteristics, simple structure, low manufacturing cost, suitable for millimeter wave communication system.

The application discloses a kind of millimeter wave beam training and environment perception integration system and method, belong to wireless communication field, wherein, system includes high-precision clock source clock reference signal is synchronized to each clock node, clock node provides reference clock signal for base station and user;Software-defined radio module of base station side generates baseband signal and up-converts, millimeter wave phased array is converted again and carries out beam forming, user side carries out down-conversion symmetrically;Software-defined radio module of user side realizes beam scanning and beam measurement, records reference signal received power;Inertial measurement unit synchronously measures and records the motion state of user;Processing module receives millimeter wave communication system measurement data and inertial measurement unit measurement data, utilizes confidence propagation real-time positioning and map construction algorithm real-time processing data estimates user and virtual anchor position.It is thus, using beam spatial channel information and the auxiliary information of user position, improve user positioning accuracy and environmental perception ability.

The present invention relates to a vision-assisted millimeter wave beam prediction method for low-light environments, belonging to the field of wireless communications. Targeting millimeter wave communication systems, the method collects image data of a communication environment under low-light conditions by means of a camera installed at a base station to construct a millimeter wave beam prediction system model, and uses a deep neural network model and a course training policy to learn the collected image data so as to predict an optimal communication beam. The present invention can improve the performance of models in low-light environments and accelerate the convergence speed of network models, thereby improving the accuracy of beam prediction and enhancing the robustness and reliability of millimeter wave communication systems in low-light environments.

This invention belongs to the field of wireless communication technology, specifically relating to a sparse three-dimensional antenna array-assisted beamforming method based on preset element positions. By constructing a rigorous physical consistency constraint model and employing hyperbolic tangent mapping and the Log-Sum-Exp function to smoothly reconstruct non-smooth geometric constraints, a highly efficient and stable joint alternation optimization algorithm is successfully designed. This invention overcomes the spatial degree-of-freedom bottleneck of traditional rigid planar arrays and fixed three-dimensional arrays in complex multipath environments. Under the premise of strictly adhering to stringent physical constraints such as element movement boundaries, intra-layer anti-coupling, and inter-layer anti-blocking, it achieves a significant leap in channel capacity and deep optimization of eigenvalue distribution, providing a complete and highly physically feasible technical solution for future high-capacity, highly robust millimeter-wave communication systems.

The invention provides a feature extraction and fusion reconstruction method, an electronic device, a medium and a product, the feature extraction and fusion reconstruction method comprises the following steps: obtaining channel time sequence data, and carrying out dimension standardization and time sequence arrangement on the channel time sequence data to obtain preprocessed data; pCA dimension reduction processing is carried out on the preprocessed data, and static features are extracted; sampling the preprocessed data by adopting a sliding window, and constructing a time sequence sample; extracting dynamic characteristics of the time sequence samples; performing full-connection mapping on the static features; performing feature splicing and regression output on the static features and the dynamic features; and training, testing, evaluating and visualizing the output result. According to the feature extraction and fusion reconstruction method, the static space feature and the dynamic time-varying feature of the channel can be precisely restored, high-precision channel modeling and reconstruction of a millimeter wave communication system in a dynamic environment are achieved, robustness, stability and channel estimation performance are good, delay is short, and generalization ability is high.