7 results about "Beamforming" patented technology

The invention provides a quick beamforming method capable of improving array resolution and gain, comprising the following steps: adopting the construction of a minimum redundant array to optimize an M-element uniform linear array into a P-element non-uniform linear array; carrying out FFT processing on primitive data of a P-element array; in a frequency domain, constructing a covariance matrix of data based on the uniform linear array in accordance with the array aperture extension characteristics of fourth-order cumulants; carrying out normalization processing on the beam space and carrying out estimation on a Bartlett spatial spectrum. By adopting the array aperture extension characteristics of the fourth-order cumulants, the invention realizes that the optimized element layout form is employed to obtain high resolution and overcomes the defects of high requirements of the original fourth-order cumulant-based methods on snapshots and great computational complexity to enable the computation process to be simple and easy to operate. When the signal to noise ratio is higher than the supercritical signal to noise ratio, the method of the invention has higher array gain than that of conventional beamforming. The normalization processing of the beam space realizes effective inhibition to background interference. The beamforming method of the invention is simple and easy to operate and is especially suitable for project application.

The invention provides a method and device for shaping wave beams. The method includes the steps of obtaining position information of users to be served by a current time slot, determining a handling capacity function of the total handling capacity of the users relative to downward inclination angle combinations according to the position information of the users, estimating the downward inclination angle combination by which the maximum value of the handling capacity function is obtained with the DIRECT algorithm, and then adjusting the downward inclination angles of the two wave beams according to the downward inclination angle combination obtained through calculation. By means of the technical scheme, the system hanging capacity can be improved.

A system having a multi-layer (multi-stream) multiple-input-multiple-output (MIMO) receiving system, having a MIMO baseband module and a radio distribution network (RDN) connected to the MIMO receiving system. The RDN has two or more beamformers that are fed by two or more antennas, so that a total number of antennas in the system are greater than the number of branches of the MIMO baseband module. Each of the beamformers combines RF signals coming from the antennas. The system further implements an antenna routing module that swaps antennas between different beamformers according to one or more qualitative indicators derived from the baseband module, thus increasing the probability of grouping antennas that have lower conflicts between best phases of different layers' transmitted signals. The system increases the range of antenna selection beyond the set of antennas available for each beamformer.

According to various embodiments, an electronic device comprises: a housing; a first wireless communication circuit located inside the housing and configured to support directional wireless communication by using beamforming; a second wireless communication circuit located inside the housing and configured to support omni-directional wireless communication; a processor operatively connected to the first wireless communication circuit and the second wireless communication circuit; and a memory operatively connected to the processor. The memory, when running, may store instructions for the processor to: perform the directional wireless communication together with an external electronic device capable of performing the directional wireless communication and the omni-directional wireless communication, by using the first wireless communication circuit; determine the distance between an electronic device and the external electronic device, at least partially on the basis of a signal of the external electronic device received by using the second wireless communication circuit, when the stop or degradation of the directional wireless communication is detected; and reattempt the directional wireless communication by using the first wireless communication circuit, at least partially on the basis of the determined distance, or determine whether to start the omni-directional wireless communication by using the second wireless communication circuit. Other embodiments are possible.

The invention discloses a self-adaptive millimeter wave beam tracking method based on extended Kalman filtering. According to the beam tracking method disclosed by the invention, the maximum tracking interval and the minimum tracking interval are determined according to the change rate of a channel angle, and then whether the extended Kalman filter is used for tracking or not is judged by comparing the change of a signal-to-noise ratio after beam forming before and after tracking. According to the method disclosed by the invention, the instantaneous gain of the channel does not need to be known, and the beam tracking frequency can be automatically adjusted in real time according to the rate of the angle change of the communication channel only by taking the angle change of the channel as the to-be-estimated quantity, so that the beam tracking time is effectively prolonged and the beam tracking overhead is reduced while the tracking precision is ensured.

Disclosed herein are an ultrasonic imaging apparatus and an image display method thereof. The ultrasonic imaging apparatus includes an ultrasonic probe configured to transmit ultrasonic signals toward an object and to receive ultrasonic signals reflected by the object, a beamformer configured to perform beamforming based on the ultrasonic signals received by the ultrasonic probe, and an image processor configured to generate an ultrasonic image of an examined region within the object based on the beamforming, to extract characteristic information which relates to the examined region from the generated ultrasonic image, and to judge whether or not the examined region coincides with a target region based on the extracted characteristic information, thus facilitating a determination as to with which region within the object the examined region corresponds based on various pieces of the characteristic information of the examined region extracted via analysis of the ultrasonic image.

A distributed beamforming system includes a platform terminal and a plurality of user terminals. The platform terminal includes an antenna array including a plurality of antenna elements. Each antenna element transmits a wide-area beam configured to encompass each of the plurality of user terminals. The platform terminal also includes one or more processors in electronic communication with the antenna array and a memory coupled to the one or more processors. The memory stores data into a database and program code that, when executed by the one or more processors, causes the platform terminal to receive an incoming signal and split the incoming signal into a plurality of individual wireless signals. Each individual wireless signal corresponds to one of the plurality of antenna elements of the antenna array. The system also transmits the plurality of individual wireless signals to the user terminal by the antenna array.