1895results about How to "Reduce mutual interference" patented technology

An autonomous mobile robot system having plural mobile robots and integrative planning means to plan the moving zone of the plural mobile robots, wherein: the integrative planning means is installed on the plural mobile robots including a main mobile robot to travel autonomously and a subordinate mobile robot to travel on the basis of the instructions of the main mobile robot; and each of the plural mobile robots is provided with, at least, measurement means to measure the situation of ambient environment, communication means to communicate between the integrative planning means and the other mobile robot, main device position recognition means to recognize the position of the mobile robot, subordinate device position recognition means to recognize the position of the other mobile robot, travel planning means to plan travel routes of the mobile robot and the other mobile robot, and travel control means to control a drive mechanism in accordance with the travel planning means. A guided vehicle and a truck or the like can travel autonomously and cooperatively while obtaining information on ambient environment without mechanical connection and can automatically be separated from and merged with each other.

In order to reduce mutual interferences between POLMUX and signals, the signals are transmitted with differed to each other carrying signals, thereby making it possible to obtain the circular polarization of each resulting POLMUX signal. Each second POLMUX signal is transmissible with an opposite circular polarization. In order to reduce also interferences when only one modulated data signal is transmitted through a POLMUX channel, a polarization plane of modulated data signals of each second POLMUX channel is turned at 45°. In a variant, polarization multiplex signals are produces and the resulting polarizations thereof in adjacent channels are perpendicular to each other.

The present invention describes a method of closed loop MIMO communication utilizing implicit or explicit channel state information (CSI) at the transmitter and the receiver. The transmitter performs linear pre-processing (for example, QR decomposition or bi-diagonal decomposition or Jacobi rotations, and/or sporadic SVDs) on a channel matrix, and the receiver mitigates the mutual interference between the streams by performing MMSE processing on the received signals. The MMSE matrix is computed with respect to the processed channel that may estimated by the receiver through preprocessed pilot signals. The transmitters preprocessing is of much lesser cost and complexity than full SVD.

Dynamic frequency selection based on CR is provided. A CR BS detects an interference-free and unused frequency band. When sensing a new BS that has great signal strength and requires the frequency band during communications in the frequency band, the CR BS releases the frequency band and dynamically selects another frequency band to avoid interference.

An antenna apparatus for a portable terminal is configured to reduce interference. The antenna apparatus includes a first antenna and a second antenna spaced apart from the first antenna. The antenna apparatus also includes a filter coupled to the first antenna and the second antenna, and configured to increase an isolation between the first antenna and the second antenna by filtering signals transmitted through the first antenna and the second antenna. The antenna apparatus further includes a main board configured to process the filtered signals.

A feed radiation electrode including two branched radiation electrodes is provided on the surface of a substrate. Non-feed radiation electrodes are provided on both sides of the feed radiation electrode and near the branched radiation electrodes. The branched radiation electrode and the non-feed radiation electrode are double-resonated in the same frequency band. The branched radiation electrode and the non-feed radiation electrode are double-resonated in the same frequency band which is higher than that of the branched radiation electrode and the non-feed radiation electrode.

The invention discloses a capacitance type embedded touch screen and a display device. A public electrode layer connected in a manner of a whole surface in a TFT (Thin Film Transistor) array substrate is divided to form mutually insulated and crossly arranged touch driving electrodes and public electrodes; a touch sensing electrode is arranged on a colorful film substrate; and time-sharing driving is performed on the touch driving electrodes to realize a touch function and a display function. As the projection of the touch sensing electrode on the TFT array substrate is located in an area where the public electrodes are of the touch screen provided by the embodiment of the invention, and the public electrodes and the touch driving electrodes are located at the same layer but insulated mutually, an enfilade area generated between the touch sensing electrode and the touch driving electrodes is avoided, a mutual capacitance formed by the enfilade area is reduced, a proportion of a mutual capacitance variation quantity caused by touch of a finger is added, and touch accuracy is improved. In addition, as the time-sharing driving touch and display functions are adopted, mutual interference is also reduced, and picture quality is increased.

The invention provides a low-profile circular-polarization antenna that can be implemented at a reduced mounting cost of components. Two linear-polarization surface-mount antennas are mounted on a mounting substrate such that their planes of polarization are perpendicular to each other in the direction normal to the mounting surface, and an amplification circuit, a shield case for covering the circuit, and a phase circuit for sending signals having the same amplitude and a phase difference of 90 degrees to the two surface-mount antennas are provided on the same mounting surface.

The invention discloses a multi-cell wireless communication method based on an intelligent reflecting surface. The method aims at a system comprising a plurality of cooperative cells. An intelligent reflecting surface is arranged in each cooperative cell, and each cooperative cell is provided with a base station and a user terminal. The method comprises the steps that a user terminal transmits a pilot signal to a base station in each cooperative cell, and each base station estimates and shares channel state information, acquires global channel state information and formulates a transmitting beam forming model; and the intelligent reflecting surface formulates a reflected beam forming model, and obtains coefficients of transmitted beam forming and reflected beam forming through modeling andsolving, thereby forming a signal for suppressing interference. According to the method, higher signal gain can be obtained when the cell base station is far away from the corresponding user terminal, and at the same time fairness between the user terminals is considered; mutual interference between the user terminals can be effectively reduced through joint optimization of sending beam forming and reflection beam forming; and the transmission efficiency of wireless communication transmission is improved.

The invention relates to magnetic silicon dioxide microspheres with a nuclear shell and surface anisotropic double functional groups and a preparation method thereof. The preparation method comprises the following steps of: preparing superparamagetic microspheres by a solvothermal process; preparing magnetic microspheres which are coated by silicon dioxide by a sol-gel process; preparing the magnetic silicon dioxide microspheres of which the surface has amino group by taking the magnetic silicon dioxide microspheres as seeds and by the copolycondensation of alkyl ester orthosilicate and a silane coupling agent, and drying the magnetic silicon dioxide microspheres to obtain samples; and by a PICKERING emulsion technology, stabilizing a paraffin/aqueous emulsion system with a micrometer scale by using the aminated magnetic microspheres to form single-layer close packing of the magnetic microspheres on the surface of paraffin spheres, then reacting the amino group on the surface of the magnetic microspheres which is exposed in a liquid phase with succinic anhydride to introduce carboxyl into the partial surface of the microspheres, so that the surfaces of the magnetic microspheres have the anisotropic double functional groups. The obtained magnetic microspheres with the double functional groups have the advantages that: magnetic responsiveness is high; grain size can be controlled between 200 and 800 namometers; and the density of the surface functional groups can be adjusted.

The invention discloses a detecting tracking integrated method for a multi-target scene, and belongs to the technology of radar detecting and tracking. The method is a multi-target tracking method coupling Bayes detection and joint probabilistic data association (JPDA) filtering. The method includes the steps that position distribution information of targets at the current moment is calculated according to prediction of a JPDA tracking filter at the previous moment; a Bayes detector takes the distribution information as prior information for detecting a judgment and detects the targets; finally, the JPDA tracking filter is used for detecting obtained measurement trace points and carries out data correlation on the measurement trace points and the targets to finish position estimation and track updating of the targets at the current moment, and position distribution information of the targets at the next moment is predicted. The method can be used in detection and tracking of adjacent targets, and has good performance and good practicality.

In a duplex radio link wherein digital data information from a data interface is transmitted from a local terminal to a remote terminal over fading dispersive channels, a method and transceiver are described that provide for transmission at an adaptive data rate. The transmission is at a constant symbol rate so that the signal bandwidth can be fixed and at the remote terminal receiver the input sampling rate can be fixed. The digital data information is transmitted over a constant data rate interval in accordance with a selected data rate mode that is a function of direct sequence spreading gain, error correction code rate, and signal constellation type. The data rate is adapted by selecting a data rate mode that is a function of the arrival rate of data packets from the data interface and a link quality measure fed back from the remote terminal. The data packet arrival rate is controlled as a function of the link quality measure and the current data packet arrival rate. In systems with multiple transmit diversity channels, independent data is sent over each of the transmit diversity channels. The adaptive data rate technique utilizes both orthogonal transmit diversities such as frequency and troposcatter polarization diversity as well as nonorthogonal transmit diversities in a Multiple-input Multiple-Output (MIMO) configuration. A single antenna troposcatter link using angle diversity and adaptation of data rate by feedback communications is described. In an idealized feedback communication example, the single antenna system in a Ku-band application is shown to have 15.5 times the data rate capability of a conventional two-antenna system at S-band.

The invention discloses a five-frequency-section user machine antenna being compatible with Beidou and GPS (Global Positioning System) functions to be used for solving the problem that isolation between the multi-frequency-section antenna layers is poor. The five-frequency-section user machine antenna being compatible with the Beidou and GPS functions comprises a Beidou first S-frequency-section patch antenna (2), a L-frequency-section patch antenna (3), a Beidou second B1-frequency-section patch antenna (4), a B3-frequency-section patch antenna (5), a feed network plate (6), a base plate (7) and a feed probe (8); an isolating ring is arranged close to a center of the Beidou second B1-frequency-section patch antenna (4) and the B3-frequency-section patch antenna (5); an input end of the feed network of the L-frequency-section patch antenna (3) is provided with a U-shaped nodule; the four patch antennas (2), (3) and (4) and (5) are sequentially arranged from high to low and top to bottom; the feed network plate (6) is fixed at the lower end of the structure; the upper end and the lower end of the feed probe (8) are respectively connected with a corresponding patch and the feed network. The five-frequency-section user machine antenna is compatible with the Beidou and GPS functions and is applicable to vehicle-mounted and shipborne navigation equipment.

The invention relates to a calibrator for a 3-way force sensor. Wherein, a X-way linear guideway for translating with a X-way loader and a Y-way linear guideway for translating with a Y-way loader are fixed perpendicular to each other on a calibrating worktable; the two ends of a beam are fixed on two ball screw for lifting the beam; the ball screws are installed vertically on the calibrating worktable; a Z-way loader is fixed on the beam; the standard force sensors that are respectively mounted on the X-, Y- and Z-way loader are intersected; an orientedly loading clamp clamps the 3-way force sensor to be calibrated, is placed on the calibrating worktable and located at the intersection of the three sensors; a motor drives the two ball screw for lifting the beam to move linearly and synchronously in Z direction. The weighing, 3-way force sensor is calibrated by a measurement comparison method. While detecting the force-measuring performance of the 3-way force sensor in any direction, one can observe the disturbance on the force measuring in another two directions, thereby the interference of forces in different directions can be reduced.

The invention discloses a method for self-configuring physical cell identifiers (PCI) for a honeycomb mobile communication network. The method comprises the following steps that: a network self-organization server collects the geographic position, antenna height, direction angle and downtilt information of a new base station; based on an experience path propagation model of the geographic position of the new base station, the network self-organization server calculates a path loss value and an antenna gain value between all base stations and determines a propagation loss value between all base stations; and by using a graph theory method, the network self-organization server globally optimizes reusing distances of the PCIs, allocates the optimized PCIs to the new base station, and then validates and screens the available PCIs by using a neighbor cell relationship list, so that interference between the base stations in which the same PCIs are used, and the PCIs can be accurately and reasonably configured. The method is applicable to automatic allocation of appropriate PCIs to the new base station which is not configured with the PCIs. By adoption of the method, configuration of the PCIs for the new base station can be quickly, conveniently and automatically finished, and the theoretical optimum performance can be realized.

The method includes following steps: the wireless network controller allocates and manages the wireless channel resources; a mixed allocation mode combining the fixed-allocation with dynamic allocation is used to provide channels for base station and mobile station. When the invention uses different orthogonal code sequences to allocate different cell, the resources of time slot and frequency can be jointly allocated to each cell. In TDD mobile communication system, the allocation above can reduce the interference between cells, and also reduce the interference between up stream signals and down stream signals.

A data line connection which comprises a base printed circuit board, a female connector mounted to the base printed circuit board, and a compensation printed circuit board mounted within the female connector. The compensation printed circuit board mounts a plurality of electrically conductive contact elements as well as a compensation circuit for reducing electrical interference. The base printed circuit board includes a further compensation circuit for further reducing electrical interference.

The invention discloses a gas concentration measurement device, comprising a light source; a sensor for inducing and converting light signals into electric signals to be output; a light source limit hole on the light path between the light source and the sensor for changing the shape of the light beam transmitted from the light source, while the light source limit hole is in the shaped fit with the light sensitive zone of the sensor; a rotary chopper wheel arranged between the light source and the sensor and provided with at least two light filter through holes; at least two filters respectively mounted in the filter through holes for transmitting the belt-pass light of a specific wavelength band; and a measurement gas chamber for containing object gas, while the measurement gas chamber is provided on the light path between the chopper wheel and the sensor, and the light emitted from the light source passes the filters and the measurement gas chamber to radiate the sensor. The gas concentration measurement device has simple design and low cost, has good detection consistence on gas concentration, high accuracy and stability.