48 results about "Antenna spacing" patented technology

The invention relates to a mobile antenna communication system robust resource optimization method based on angle information uncertainty, and belongs to the field of wireless communication. The method comprises the following steps: constructing a mobile antenna communication system model, and establishing a system energy efficiency maximization resource allocation model based on bounded angle information uncertainty by considering base station transmitting power constraint, user rate constraint, channel uncertainty constraint and mobile antenna spacing constraint; a non-convex original problem is equivalently converted into a convex subproblem about base station beam forming and movable antenna positioning by using transformation replacement, Bukbach, exponential conversion, continuous convex approximation, an S process, a subgradient inequality, singular value decomposition and a block coordinate descent method; and solving a plurality of convex sub-problems by using the CVX to obtain an optimal beam forming matrix and a movable antenna position vector, namely an optimal resource allocation strategy. The energy efficiency of the mobile antenna system can be effectively improved, and compared with a traditional method, the communication outage probability can be effectively reduced.

The invention discloses a design method and system of an array antenna, and relates to the technical field of computer aided design. According to the design method of the array antenna, a test angle, the number of antenna units in the array antenna, an initial current intensity value and an initial phase value of each antenna unit, and an antenna spacing value and an antenna working frequency value of each group of adjacent antenna units are acquired, array analysis and gain analysis are performed, and whether gain is in a preset interval is judged; and if the gain of all the test angles does not meet the preset interval requirement, adjusting the current intensity and the phase value, and repeatedly analyzing and judging until the gains of all the test angles meet the preset interval requirement. According to the method, the gain is ensured to meet the preset interval requirement in all test angles, so that the consistency of the multi-angle gain is improved, the calculation complexity of the optimization process is effectively reduced, and the design efficiency is remarkably improved.

The invention discloses a beam training method, system and device for a near-field broadband XL-MIMO system based on grating lobes, and relates to the technical field of wireless communication. The method comprises the following steps: selecting a base station antenna spacing greater than half-wavelength, activating a corresponding antenna and connecting the antenna to a TTD element; designing a grating lobe generation and coverage mechanism based on the antenna spacing greater than half wavelength, and generating a codebook containing a user potential range area; and the pilot signals in the codebook are sequentially sent by the base station so as to carry out rough search. The position of the user is searched in two stages. In the rough search stage, a codebook based on grating lobes is designed in angle and distance dimensions by selecting a base station antenna spacing greater than half-wavelength and calculating TTD parameters, so that a plurality of potential user positions are determined. And in the accurate searching stage, the antenna spacing is recovered to the half wavelength, and the user position with the optimal gain is accurately identified according to the result of the rough searching stage, so that the final user position estimation is obtained.

The present invention discloses a device and method for improving the AoA measurement accuracy of UWB. The device includes a UWB chip, three external antennas, three internal antennas, a main control MCU, and a power supply. The three external antennas and the three internal antennas are both distributed in an equilateral triangle. The distance between the internal antennas is less than λ / 2, the distance between the external antennas is greater than λ / 2, and the connecting lines between the internal antennas and the connecting lines between the external antennas are parallel, and the distance between the external antennas is twice the distance between the internal antennas. When working, the azimuth angle is calculated by using the external antenna measurement received phase difference obtained by the external antenna with an antenna spacing d greater than half the wavelength λ / 2 of the signal, which can improve the accuracy of the final calculation. By using the internal antenna measurement received phase difference obtained by the internal antenna with an antenna spacing d less than half the wavelength λ / 2 of the signal to correct the external antenna measurement received phase difference obtained by the external antenna, the ambiguity can be avoided, thereby achieving the design purpose.

The invention provides an MA joint beam forming optimization method for a low-orbit satellite communication ground station, belongs to the technical field of satellite communication physical layers, and aims to solve the problems that in MA architecture related algorithms, antenna space layout and beam forming strategies cannot be effectively coordinated, but are limited by power consumption, size and mechanical structure constraints of a satellite-borne platform, the implementation difficulty is large, and the cost is high. The method comprises the following steps: establishing a three-dimensional geocentric spherical coordinate system and a three-dimensional geocentric Cartesian coordinate system; establishing a ground station center Cartesian coordinate system; acquiring an average reachable rate, a signal to interference plus noise ratio of a ground station and interference signal gains of other satellites; constructing an optimization problem P1 by taking the antenna position, the antenna spacing and the signal to interference plus noise ratio of the ground station and the interference signal gains of other satellites as constraint conditions; introducing an auxiliary variable, and converting the optimization problem P1 into a quadratic constraint problem p2; and decomposing the secondary constraint problem p2 into a sub-problem P3 to optimize AWV and a sub-problem P4 to optimize APV, and carrying out iterative solution.

The utility model relates to the technical field of communication equipment, and discloses a double-antenna spacing adjusting device, which comprises a fixed support, a transfer assembly and two antenna fixing assemblies. The transfer assembly is arranged at one end of the fixing support, one antenna fixing assembly is arranged at the other end of the fixing support, and the other antenna fixing assembly is arranged at the output end of the transfer assembly. According to the utility model, the transfer assembly drives the antennas on the two antenna fixing assemblies to be close to each other or far away from each other, and when the transfer assembly controls the two antenna fixing assemblies to be close to each other, the antennas can be adjusted to the closer positions at the same time, so that the occupied space is smaller; the transfer assembly adjusts the two antenna fixing assemblies to be far away from each other, so that the distance between the two antenna fixing assemblies is adjusted to be larger than 1 m, the requirement that the lifting rod carries the two antennas for simultaneous communication is met, and mutual communication interference of the two antennas installed on the antenna fixing assemblies is avoided.

The invention relates to the technical field of wireless communication, in particular to an antenna radiation and mutual coupling collaborative optimization system based on a time domain hybrid fast algorithm. The antenna radiation and mutual coupling collaborative optimization system based on the time domain hybrid fast algorithm is applied to an unmanned aerial vehicle group communication system and comprises an antenna array unit, a data acquisition unit, a time domain hybrid fast algorithm unit, a mutual coupling calculation unit, an optimization control unit and a communication coordination unit. According to the invention, the three-dimensional geographic coordinates, attitude angle data and signal intensity of the unmanned aerial vehicle group are acquired in real time through the data acquisition unit, and real-time mutual coupling coefficient analysis of the mutual coupling calculation unit is combined, so that the system can dynamically sense the formation form change and trigger the optimization instruction, and the optimization control unit performs comparison through a preset threshold value. The node with the maximum deviation degree is adjusted preferentially, it is ensured that the antenna spacing and the radiation pattern are always adaptive to the dynamic environment, the mutual coupling effect is reduced, and the communication stability is remarkably improved.

Provided are a method by which a first device performs wireless communication, and a device supporting same. The method may comprise the steps of: acquiring configuration information for sensing from a base station or a sensing management function (SMF); and transmitting or receiving a sensing signal on the basis of at least one antenna. For example, the at least one antenna may be on the basis of an antenna interval included in the configuration information.

The present invention proposes a method for estimating angles when the antenna spacing exceeds half a wavelength, which is used for angle measurement when the antenna spacing exceeds half a wavelength. The method comprises the following steps: 1) constructing an OFDM-based angle measurement system; 2) initializing a transmitter to send an OFDM signal to a receiver; 3) constructing a signal reception model at the receiving end; 4) introducing a reference angle to iteratively project the signal; 5) using the proposed power-based matching pursuit algorithm to perform parameter estimation; and 6) determining the angle of the direct path. The present invention effectively solves the problem that the angle cannot be accurately measured when the antenna spacing exceeds half a wavelength, and improves the angle measurement accuracy, and is suitable for scenarios such as personnel positioning in indoor environments.

The invention discloses a multi-carrier space division multiple access system based on a movable antenna and an optimization method of the multi-carrier space division multiple access system, and relates to the technical field of wireless communication. According to the method, a channel model, including time domain channel response and frequency domain channel response, under the system is provided firstly, and then the transmission rate of the system is maximized on the premise that the given transmitting power, the minimum antenna spacing and the antenna moving area are met. In order to optimize the transmission rate of the system, the invention provides an alternate optimization algorithm which sequentially and alternately optimizes precoding and antenna positions. According to the invention, the spatial degree of freedom can be fully utilized; through joint optimization of system precoding design and antenna positions, the transmission rate of the system is maximized under the condition that the system meets the constraints of given transmitting power, antenna moving areas and minimum antenna intervals.

Disclosed is a blood flow measurement device capable of emitting microwaves at a target blood vessel of a human body, measuring a blood flow in real time by using the microwaves reflected from the blood vessel, and adjusting, by means of a simple method, the position of the target blood vessel, which is the target of the microwaves. The disclosed blood flow measurement device comprises a probe having: a bar-shaped probe body extending in the longitudinal direction; and an antenna unit formed at one end of the probe body. The antenna unit includes: a transmission antenna for emitting microwaves at the target blood vessel in the human body; a reception antenna for receiving the microwaves transmitted from the transmission antenna and reflected by the target blood vessel; and an antenna spacing adjusting unit, which adjusts spacing between the transmission antenna and the reception antenna so as to adjust the measurement position of the blood flow to the depth of the target blood vessel for which the blood flow is to be measured.

The invention belongs to the technical field of base stations, and particularly relates to a base station convenient to adjust and install, which comprises a base and a moving seat slidably arranged on the base, a plurality of antennas are arranged on the moving seat, a lightning rod is arranged on the moving seat, a moving screw rod is fixedly arranged on the base, and the moving seat is slidably arranged on the base through the moving screw rod; according to the base station convenient to adjust and install, through rotation of the vertical rod and meshing of the driving gear and the driven gear, the movable base moves on the movable lead screw through the threaded sleeve, and position adjustment of the movable base is achieved; meanwhile, the vertical rod enables the transverse moving lead screw to drive the transverse moving rod to move through the connecting assembly, the transverse position of the antenna is adjusted, the antenna distance is changed in the lifting process of the moving seat, the vertical rod can further drive the lifting lead screw to rotate, a mounting seat on the lightning rod moves on the lifting lead screw and the lifting sliding rod, and the lightning rod is synchronously lowered in the lowering process of the moving seat. Lightning rod installation and maintenance are facilitated.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a network node may receive signals associated with a spatially multiplexed communication having a first number of layers per polarization via a set of receive antenna groups having a first antenna pitch independent of a distance between the network node and a transmitting device. The network node may forward signals associated with spatial multiplexing communications having a second number of layers per polarization via a set of transmit antenna groups having a second antenna pitch independent of the distance between the repeater and the receiving device. Numerous other aspects are described.

The application discloses a kind of design method and system of array antenna, it is related to computer-aided design technical field.The design method of array antenna, by obtaining test angle, the number of antenna units in array antenna, the initial current intensity value of each antenna unit, initial phase value, the antenna spacing value of each group adjacent antenna unit, antenna operating frequency value, and carry out array analysis and gain analysis, whether the gain is in the preset interval is judged, if not satisfied, adjust current intensity and phase value, repeat analysis and judgment, until the gain of all test angles meets the preset interval requirement, the initial data of the application is analyzed and gain analysis, combined with adjustment compensation model, the current intensity and phase distribution of antenna unit are gradually optimized, ensure that gain meets the preset interval requirement in all test angles, so as to not only improve the consistency of multi-angle gain, but also effectively reduce the calculation complexity of optimization process, significantly improve design efficiency.

The invention provides a full-duplex antenna system and an application method thereof, electronic equipment and a computer program, and relates to the technical field of communication, a transmitting antenna is designed into a multi-order two-dimensional array and is provided with a reflecting surface, and meanwhile, beam direction adjustment is realized in combination with an adjustable module; a multi-input multi-output antenna composed of a plurality of sub-antennas is adopted in cooperation with a receiving antenna, the distance between the adjacent sub-antennas is smaller than the first preset proportion of the working wavelength of the target terminal, and a directional diagram null trapping area is aligned with a transmitting antenna, so that the self-interference elimination capability is improved, and the spatial domain self-interference suppression effect is enhanced; the communication flexibility is improved by rotating the transmitting antenna to accurately align to the base station, meanwhile, the receiving reliability is guaranteed by utilizing the characteristics of the multiple-input-multiple-output antenna, and effective shielding is formed when the reflecting surface rotates, so that the problem of how to improve the self-interference elimination efficiency of the terminal while considering the reliability and flexibility of terminal communication can be solved, and the user experience is improved. The effect of improving the communication quality is achieved.

A wireless communication method is disclosed. The method includes transmitting a sensing signal in a sensing mode using a first set of antennas; receiving echo signals in a sensing mode using a second set of antennas; and performing wireless communication in a communication mode using the first set of antennas and the second set of antennas; wherein the first set of antennas and the second set of antennas are different in at least one of an antenna pitch, a radio frequency, RF, a link implementation, an antenna type, or an antenna arrangement.

The invention discloses a downlink communication rate optimization method and system based on a clip antenna array, and a storage medium, a base station provides services for a single antenna user randomly distributed in a square with a side length D through a plurality of clip antennas, and the method comprises the steps: building a rate model based on a finite code length theory, constructing a clip antenna position optimization problem, an objective function with the maximum user rate as the optimization objective is obtained, the optimization variable is the abscissa of the position of the clip antenna, and the optimization constraints are the minimum antenna spacing constraint and the QoS constraint; equivalently converting the QoS constraint into a signal-to-noise ratio constraint, and carrying out equivalent transformation on the target function; deriving a closed-form solution of the antenna position; and adjusting the closed-form solution of the antenna position according to the phase constraint to obtain the optimal solution of the antenna position optimization problem. Complex radio frequency link configuration in a traditional array is avoided, and the reachable rate under the limited code length is effectively improved under the condition that the service quality and the antenna spacing constraint are guaranteed.

Multimodal radar antenna device (100, 200, 300), comprising: a transmitting antenna section (120, 220, 320) comprising a first plurality of transmitting antennas (101) configured to transmit a steerable mode signal, a second plurality of transmitting antennas (104) configured to transmit an imaging mode signal, and a third plurality of transmitting antennas (103) configured to transmit the imaging mode signal and the steerable mode signal; and a receiving antenna section (140, 240, 340) comprising a plurality of receiving antennas (102), wherein the second plurality of transmitting antennas (104) is arranged between the first plurality of transmitting antennas (101), wherein the second plurality of transmitting antennas (104) is arranged between the third plurality of transmitting antennas (103), wherein the first plurality of transmitting antennas (101) comprises a first set of steerable mode signal transmission antennas (121) with a spacing of 1.5 λ between antennas of the first set of steerable mode signal transmission antennas (121) and a second set of steerable mode signal transmission antennas (122) with a spacing of 1.5 λ between antennas of the second set of steerable mode signal transmission antennas (122), wherein the first sentence and the second sentence are arranged horizontally along an axis, and where λ is a wavelength of a signal that is sent or received by an antenna.

An electronic device according to an embodiment comprises: a first antenna disposed in a first housing part; a second antenna disposed in a second housing part; and a driving unit configured to cause the second housing part to slide. The electronic device may control the driving unit to adjust the distance between the first antenna and the second antenna for a UWB signal to be received from an external electronic device.

Systems and methods are provided for AI / ML based radio resource management for serving and neighbor cells with different transmit antenna pattern implementations. A unified AI / ML model is trained using a training data set including of a mixture of RSRP beam pairs drawn from different subsets or spatial beam directions or different Tx implementations, such as different antenna spacings. Assistance information provided to the AI / ML model is selected from beam angles of probing Tx beams, Tx codebook sizes, beamwidths, and antenna spacings.

The invention discloses a symmetric translation co-prime sparse array design method suitable for a mixed field, and the method comprises the steps: firstly selecting U + 1 antennas, constructing a subarray 1 through sparse uniform linear arrangement at an antenna spacing V, then selecting V-1 antennas, constructing a subarray 2 through right shift after sparse uniform linear arrangement at an antenna spacing U, and finally folding the subarray 1 and the subarray 2, according to the method, the sub-array 3 and the sub-array 4 are constructed, the symmetric translation co-prime array is constructed by integrating the four sub-arrays, and the array can be higher in mutual coupling resistance and higher in parameter estimation precision under the condition that the degree of freedom of the array is equivalent to that of an existing sparse array.

A method for determining an angle of arrival at a communication device is described. The method comprises performing a message exchange between the communication device and a further communication device. The message exchange comprises receiving at least one first message associated with a first frequency at the communication device by means of a first antenna and a second antenna and receiving at least one second message associated with a second frequency at the communication device by means of the first antenna and the second antenna. The method further comprises determining the angle of arrival defined by an orientation of the communication device and a transmission direction of the message exchange, wherein the angle of arrival is determined based on the received first message and the received second message. Furthermore, a corresponding communication device is described.

The invention discloses a method for optimizing a clamping antenna system assisted multi-backscattering device symbiotic wireless network, which comprises the following steps of: realizing fair scheduling and resource allocation of a plurality of backscattering devices by introducing a time division multiple access mechanism and two configurable transmission protocols (Pinch Multiplexing and Pinch Switch); based on a penalty function method and a successive convex approximation technology, a non-convex optimization problem is converted into a solvable convex problem, and the sum rate of a backscattering system is maximized on the premise that the minimum rate of a mobile user and the antenna spacing constraint are met through joint optimization of the clamping antenna position and the beam forming vector through an analytical solution. According to the method, the transmission reliability, the calculation efficiency and the real-time performance of the system are effectively improved, meanwhile, the limitation that large-scale fading cannot be compensated by a traditional relay technology is overcome, and an efficient and flexible solution is provided for practical deployment of a symbiotic wireless network.

The present invention discloses a method and system for calculating the optimal antenna spacing in a MIMO system. The method comprises the following steps: establishing a relationship between a channel matrix, an antenna vector matrix, and a multipath cluster environment matrix under a random geometric channel model; establishing a relationship between a transmitting antenna vector matrix, a departure angle, and a transmitting antenna spacing; establishing a relationship between a receiving antenna vector matrix, an arrival angle, and a receiving antenna spacing; in the MIMO system, comprehensively considering the condition number of the channel matrix and the sum of squares of the matrix's singular values as optimization targets, setting the case of omnidirectional antennas, calculating and solving the optimal antenna spacing to obtain the best MIMO channel; dividing the problem into three cases: the number of transmitting antennas is equal to the number of environmental clusters, the number of transmitting antennas is greater than the number of environmental clusters, and the number of transmitting antennas is less than the number of environmental clusters, and solving the three cases to obtain the optimal antenna spacing corresponding to the three cases; quantitatively analyzing the influence of the antenna vector matrix on the channel matrix condition number, and providing the optimal antenna spacing.

The application discloses a phase shift and time delay calculation method and system for a near-field sensing and communication integrated system, and the method comprises the following steps: calculating the phase shift of each phase shifter and the initial time delay range of each time delay module according to a preset system sensing coverage, an antenna spacing, a system minimum frequency, a system maximum frequency and a system bandwidth; wherein the preset system sensing coverage comprises a preset sensing angle domain coverage and a preset sensing distance domain coverage; calculating the final time delay range of each time delay module according to a preset system sensing resolution, the preset system sensing coverage, the antenna spacing, the system minimum frequency, the system maximum frequency and the system bandwidth; wherein the preset system sensing resolution comprises a preset sensing angle domain resolution and a preset sensing distance domain resolution; and obtaining the time delay of each time delay module under the maximum communication user reachable rate within the final time delay range.

A MIMO radar system has a transmitting array with a plurality of transmitting antennas arranged at a distance from each other in an angle resolving direction, a receiving array with a plurality of receiving antennas arranged at a distance from each other in an angle resolving direction, an antenna spacing of one of the transmitting and receiving arrays being above the Nyquist limit for a single valued angle measurement, however an antenna spacing of the combination of the transmitting and receiving arrays being below the Nyquist limit, a control and analysis processing device configured for transmitting a transmitting signal by the transmitting array in each of a plurality of measurement periods implemented repeatedly according to a periodic multiplexing scheme, converting a signal received in a measurement period into a detection space of at least two dimensions, testing a plurality of hypotheses of a plurality valuedness against an estimate, selecting a hypothesis of the plurality valuedness with a highest quality measure for a single valued Doppler measurement, performing an independent angle estimation based on the transmitting and receiving array, merging results of the independent angle estimations into a single valued angle measurement.

A radar calibration system is set on a vehicle and includes a sensing unit and a housing. The sensing unit includes a receiving antenna array, the receiving antenna array includes at least four receiving antennas, the receiving antennas are arranged on an antenna plane and have a receiving antenna center, the distance between the receiving antenna center and the ground is greater than 40 cm, and the distance between any two adjacent receiving antennas is a receiving antenna interval, the ratio of the receiving antenna interval is 1:3:2 in sequence. The housing includes a bottom surface attached to the outer surface of the vehicle, the sensing unit is arranged in the housing, the antenna plane and the antenna plane angle of the outer surface of the vehicle are between 0 degrees and 90 degrees, and the vertical distance between the receiving antenna center and the bottom surface is less than or equal to 2 cm. Therefore, it is beneficial to reduce the sensing error caused by the virtual mirror target.

Methods, systems, and devices for wireless communications are described. A network entity may transmit channel state information (CSI) reference signals (CSI-RSs) to a user equipment (UE). A user equipment (UE) may perform measurements on channel state information (CSI) reference signals (CSI-RSs) and may generate a CSI report based on the measurements and an indicated codebook. The CSIRSs may be transmitted via an antenna array such as a uniform linear array (ULA). Antenna spacing at the ULA may be selected as λ / 2, where λ refers to the wavelength. A precoding codebook for a ULA or a two-dimensional cross polarized array may ensure unitary precoding matrices for an antenna spacing of λ / 2. The codebooks may be generated such that for an antenna spacing of λ / 2 for any initial beam angle, the additional beam angles may be orthogonal with the initial beam angle (e.g., the precoding matrices may be unitary).

The utility model discloses a Ka frequency range antenna, belongs to the technical field of communication, and comprises 256 unit horn array antennas and an antenna carrier plate, and belongs to the field of antenna design, the unit horn array antennas are uniformly distributed on the antenna carrier plate, the spacing of the unit horn array antennas is 18.5 mm, the size of the antenna carrier plate is 300mm * 300mm * 40mm, and the antenna carrier plate is a rectangular plate. According to the utility model, the technical problems in the prior art that the maximum gain of the antenna is too small and the circular polarization axial ratio is too large are solved.

The present invention belongs to the technical field of base stations, and particularly relates to a base station that is convenient for adjusting installation, including a base and a moving seat slidably arranged on the base. A plurality of antennas are arranged on the moving seat, and a lightning rod is arranged on the moving seat. A moving screw rod is fixedly arranged on the base, and the moving seat is slidably arranged on the base through the moving screw rod; for this base station that is convenient for adjusting installation, by rotating the vertical rod, through the engagement of the driving gear and the driven gear, the moving seat moves on the moving screw rod through the threaded sleeve, realizing the adjustment of the position of the moving seat; at the same time, the vertical rod, through the connecting component, makes the transverse moving screw rod drive the transverse moving rod to move, realizing the adjustment of the lateral position of the antenna, changing the antenna spacing during the lifting and lowering process of the moving seat. The vertical rod can also drive the lifting screw rod to rotate, making the mounting seat on the lightning rod move on the lifting screw rod and the lifting slide rod. During the process of the moving seat lowering, the lightning rod is lowered synchronously, facilitating the installation and maintenance of the lightning rod.