995 results about "Interference problem" patented technology

An unmanned aerial vehicle (UAV) addresses remotely piloted UAVs making them easier to operate, provide a more flexible positioning system, also improving on communications latency and interference problems. The UAV sends symbolic messages to an educated public via color.

A Multi Input Multi Output (MIMO) Wireless Communication System method and apparatus are proposed whereby in a 2-way wireless communication system with scattering, random and imperfectly estimated propagation channels the ubiquitous and inherent MIMO cross-talk interference problem is solved so that robust and predictable Extended Communication Range and Extended Data Rate are achieved.

A spring-driven pusher assembly of a merchandise dispenser in which the spring is carried entirely on the pusher assembly behind the articles being dispensed to thereby eliminate any interference problems with RF signals or the like used for purposes of determining inventories and the like. Preferably, the spring is a spiral spring that rotates a drive wheel when the spring uncoils. The drive wheel cooperatively engages a guide track on the base of the dispenser, and the rotation of the drive wheel causes the pusher assembly to advance along the guide track toward the dispensing end of the dispenser.

Wireless communication networks utilize various communication protocols to exchange data between wireless network devices. Overlapping communication frequencies between data exchange protocols present a collision and interference problem when data transmissions are transmitted using similar timing and frequency characteristics during wireless transit. A device and various network configurations for monitoring, moderating, and / or coordinating wireless transmission traffic in a wireless communication network where overlapping communication frequencies coexist is described to significantly reduce or avoid interference caused by signal collisions.

This invention is related to a deep multi-sensor fusion system for inter-radar interference-free environmental perception comprising of (1) polystatic Multi-Input Multi-Output (MIMO) radars such as radio frequency radar and laser radar; (2) vehicle self-localization and navigation; (3) the Internet of Vehicles (IoV) including Vehicle-to-Vehicle communication (V2V), Vehicle-to-Infrastructure communication (V2I), other communication systems, data center / cloud; (4) passive sensors such as EOIR, and (5) deep multi-sensor fusion algorithms. The self-localization sensors and V2X formulate cooperative sensors. The polystatic MIMO radar on each vehicle utilizes both its own transmitted radar signals and ones from other vehicles to detect obstacles. The transmitted radar signals from other vehicles are not considered as interference or uselessness as conventional radars, but considered as useful signals to formulate a polystatic MIMO radar which can overcome the interference problem and improve the radar performance. This invention can be applied to all kinds of vehicles and robotics.

A spring-driven pusher assembly of a merchandise dispenser in which the spring is carried entirely on the pusher assembly behind the articles being dispensed to thereby eliminate any interference problems with RF signals or the like used for purposes of determining inventories and the like. Preferably, the spring is a spiral spring that rotates a drive wheel when the spring uncoils. The drive wheel cooperatively engages a guide track on the base of the dispenser, and the rotation of the drive wheel causes the pusher assembly to advance along the guide track toward the dispensing end of the dispenser. A method of dispensing merchandise is also provided.

The invention discloses a method for avoiding coexistence interference in terminal equipment. The terminal equipment comprises an LTE (long term evolution) module of an LTE system, and a non-LTE module of other wireless systems, wherein the LTE module can detect the ICO (in-device coexistence) interference problem. The method comprises: the LTE module estimates the ICO interference condition, and sends an ICO interference indication message to an evolved NodeB (eNB), wherein the ICO interference indication message comprises an unavailable frequency list and TDM (time division multiplexing) mode information; the eNB judges the ICO interference avoiding mode according to the ICO interference indication message and auxiliary information sent by the terminal equipment, wherein the auxiliary information comprises a power headroom report (PHR) and a proximity indication message; and the eNB sends a terminal behavior instruction message to the terminal equipment according to the judgment result to instruct the terminal equipment to perform corresponding operation. According to the technical scheme of the invention, the ICO interference problem can be preferably solved, and the user experience and system performance can be enhanced.

Slit valves placed in normally closed distal tips at the leading end of catheter tubes are disclosed whereby tube passageway occlusion problems and body cavity interference problems are greatly reduced, if not eliminated.

Described is a protocol by which wireless network communication devices comprising peer nodes (such as a computer system and an access point) cooperatively exchange information about RF interference detected in the network. The protocol administers the exchange of formatted control data corresponding to the detected interference among computing nodes running a service capable of processing the control data. A peer table is used to maintain locally-obtained and remotely-obtained control data. Records in the peer table are arranged with different levels of granularity with respect to interference and networking information. The interference information collected through the cooperative protocol may then be used by peer devices in the network to adapt to mitigate interference-related problems. The protocol also provides for discovery of peer node capabilities, including a negotiable transport for the control data that may be different from the main data channel transport.

The present invention provides methods for preventing low train voltages and managing interference, thereby improving the efficiency, reliability, and passenger comfort associated with commuter trains. An algorithm implementing neural network technology is used to predict low voltages before they occur. Once voltages are predicted, then multiple trains can be controlled to prevent low voltage events. Further, algorithms for managing inference are presented in the present invention. Different types of interference problems are addressed in the present invention such as “Interference During Acceleration”, “Interference Near Station Stops”, and “Interference During Delay Recovery.” Managing such interference avoids unnecessary brake / acceleration cycles during acceleration, immediately before station stops, and after substantial delays. Algorithms are demonstrated to avoid oscillatory brake / acceleration cycles due to interference and to smooth the trajectories of closely following trains. This is achieved by maintaining sufficient following distances to avoid unnecessary braking / accelerating. These methods generate smooth train trajectories, making for a more comfortable ride, and improve train motor reliability by avoiding unnecessary mode-changes between propulsion and braking. These algorithms can also have a favorable impact on traction power system requirements and energy consumption.

Described is a system and method for transporting interference-related control data and other information between nodes in a wireless network, using a control channel that is distinct from a content channel used to transport content. The control channel may be a different channel in the same unlicensed band as the content channel, a channel in a different unlicensed band, or a channel in a licensed band, and thereby not subject to the same interference-related problems that the unlicensed content channel may experience. As a result, management information for adjusting the content channel's communication parameters may still be communicated between the nodes, whereby mitigation actions may occur. For example, the content channel may be changed to another frequency, compression may be implemented or varied, and / or the data transfer rate may be varied. The control data can also be used to change the control channel's communication parameters.

The invention provides a planning method and a planning system for community resources, aiming at solving the problem of avoiding the interference among communities as much as possible in the resource plan. The method comprises: aiming at the communities needing planning, calculating the interference weight of the interference communities of the community to each community; sequencing the communities needing planning according to the interference weight so as to obtain an interference community queue; and looking through all the communities in the interference community queue and selecting the community group according to an interference price, wherein the interference price and the interference weight are related to the sequence of the communities. According to the planning method and the planning system, the interference among communities is comprehensively taken into consider, therefore, the interference problem of adjacent communities is avoided, and the interference of the channels of a CRS (Central Reservation System) among the communities is effectively avoided, thereby optimizing the performance of a distributed system.

The RF communications system of the present invention wirelessly communicates data without encountering undue interference problems with other devices and complies with rules governing unlicensed, spectrum-sharing devices. In an example embodiment, a transmitter device includes a digital subsystem powered by a power supply that processes data from another device and a radio frequency (RF) sub-system that transmits the processed data using a frequency hopping scheme. The RF sub-system includes a microprocessor arrangement that ON-OFF keys a voltage controlled oscillator (VCO) and provides a frequency-hopping scheme. The VCO is coupled to a signal frequency spreading arrangement that spreads the signal to a predetermined transmission bandwidth, wherein the frequency spreading occurs during an ON state of the ON-OFF keying and the transmission bandwidth exceeds a reception bandwidth at which the signal will be decoded.

The invention discloses a self-organized wireless local area network and a realization method thereof. A measuring module, a measuring information reporting module and an adjusting module are arranged on a user side in the network; a receiving module, a measuring module, a measuring information reporting module and a self-organized network adjusting module are arranged at an access point (AP) end; and a data acquisition module, a data mining module, a self-configuration / self-optimization analysis module and a self-organized network feedback module are arranged at a background server end, so that automatic networking and network self-optimization functions of the wireless local area network can be realized. Each user under the coverage of the wireless local area network measures wireless transmission information and feeds the measured information back to a background server through an AP, and the background server is used for acquiring and analyzing the measured information fed back by each user, judging whether a coverage or interference problem exists and automatically finishes optimized configuration of the channel and power, so that automatic configuration of a new AP is facilitated. According to the invention, self-configuration of performance parameters of the new AP and self-optimization of a configured AP are finished intelligently and automatically without manual intervention.

The invention provides a sliding-mode control method of a permanent magnet synchronous motor based on reaching law and disturbance observation compensation. A new reaching law algorithm is designed, and applicable in design of a speed controller in a sliding-mode variable structure; simultaneously, a saturation function is used in a disturbance observer control law, and used for improving a disturbance observer; a value observed by the disturbance observer is compensated in the speed controller; and therefore, a new control strategy is formed. The new control method is applicable in a vector control system of the permanent magnet synchronous motor; a current-speed double-closed-ring control structure is adopted; for buffeting and anti-interference problems in the sliding-mode control, an integral sliding-mode surface and a new reaching law are added based on the conventional sliding-mode speed controller; simultaneously, the disturbance observer is added; disturbance due to load changeis effectively inhibited; the responsiveness of the system is improved; buffeting of the system is reduced; and the anti-interference performance and the robustness of the system in a complex environment are obviously improved.

The invention discloses an unmanned-aerial-vehicle visual-SLAM (Simultaneous Localization and Mapping) method based on a binocular camera, an unmanned aerial vehicle and a computer-readable storage medium. The method includes the steps of: acquiring depth images of at least two different locations through the binocular camera; obtaining camera pose information through a visual odometer according to the acquired depth images of the at least two different locations; carrying out nonlinear optimization, appearance-based circle loop detection and circle loop verification on the camera pose information to obtain optimized camera pose information; and carrying out binocular dense mapping according to the optimized camera pose information to obtain a global map. According to the method, the depthimages of the different locations are acquired through the binocular camera, and binocular dense mapping is carried out after use of the visual odometer, nonlinear optimization, circle loop detectionand circle loop verification to obtain the global map; and on the one hand, the interference problem existing with adopting of RGB-D cameras can be solved, and on the other hand, more precise localization can be realized, and the more precise map is established.

The invention provides an ultralow-power consumption smart equipment rapid network accessing method and a smart home system. The method comprises steps that a to-be-accessed new smart device sends a broadcast packet; a mobile terminal selects a networking gateway to be connected with the to-be-accessed new smart device, when the broadcast packet is scanned, immediate connection is carried out and related network accessing information of the new device is obtained, and the mobile terminal sends a device adding command to a cloud server; the cloud server requests network opening to the networking gateway, when the verification is successful, the networking gateway actively opens the network and returns a unique network identifier ID to the cloud server; the new smart device performs identity verification; and if the verification is successful, the new smart device can access the network, otherwise, the new smart device cannot access the network. The advantages are that 1) the interference problem that multiple devices around access the network at the same time is solved, multiple new devices are allowed to access the network at the same time without mutual interference; 2) searching for the networking gateway is not required for accessing the network, so that the networking accessing is fast; and 3) the device achieves real-time online communication.

The invention discloses an air-quality monitoring system based on electronic nose technique, and a monitoring method thereof. The system is characterized by being provided with a sensor signal conditioning circuit, wherein a quality detection input end group of the sensor signal conditioning circuit is connected to a gas sensor group; the output end of the sensor signal conditioning circuit is connected to a sensor array signal preprocessor; the output end of the sensor array signal preprocessor is connected to a central processing unit; and a display end of the central processing unit is connected to a display. The system has the advantages that the discreteness problem of a metallic oxide sensor and the mutual interference problem of various gases are better solved by utilizing a virtual resistance method and a specific algorithm provided by the invention, thereby greatly promoting the output precision of the system, being capable of calculating the concentration values of different outputted gases, and determining the type of the gases, and simultaneously finishing the qualitative and quantitative identification of gases, and one output of an artificial neural network represents one gas.

The invention relates to a five-axis NC (numerical control) milling method for the internal surfaces of bent pipes, particularly relates to a method for machining the internal surfaces of bent pipes by using a five-axis NC milling machine, belonging to the field of NC processing. The method is implemented based on UG software, and used for machining the internal surfaces of bent pipe components by using five-axis NC machining equipment and lengthened ball cutters. The method comprises the following steps that: before the internal surfaces of bent pipe components are machined, the operations of carrying out division on processing regions, carrying out planning on cutter paths, and carrying out interference processing on cutter shafts and workpieces are performed; a clamping and positioning operation is performed on processed bent pipe components; and the cutting operation of the cutter in the process of machining is performed along the circumferential directions of the internal surfaces of bent pipes so as to always guarantee that the central line of the bent pipe passes through the circle center of an end of the bent pipe. The method disclosed by the invention is stable in cutting state, good in surface quality, and high in efficiency, and breaks through the limitation that special equipment is necessary to be used. By using the method disclosed by the invention, the interference problem existing in processing the internal surfaces of bent pipes is solved, and the cutting impact load is effectively reduced, therefore, the method is suitable to be used for machining bent pipe components with a large diameter ratio and a large angle of bending.

The invention discloses a tight reservoir volume pressure crack network extension simulation and representation method. The method comprises the following steps of: firstly establishing a multi-crackstress interference-considered tight reservoir combined ground stress field calculation model by utilizing a displacement discontinuity method, mechanical mechanism analysis and crack initiation and extension criterions; aiming at a stress interference problem in volume pressure crack multi-crack extension process, establishing flow pressure drop distribution models, in primary and secondary cracks, of a fracturing fluid, so as to form a tight reservoir volume pressure crack horizontal well crack network extension theoretical model; and finally comprehensively analyzing influences, on volume pressure crack network structural morphology, of different factors, and defining a plurality of feature parameters to represent crack network structure morphology and attribute features. At last, the tight reservoir volume pressure crack network extension simulation and representation method is established. The tight reservoir volume pressure crack network extension simulation and representation method has the advantages of being comprehensive in model factor consideration, high in simulation effect and visual in result, and has a certain guiding significance for optimum design and efficient development of tight reservoir cracks.

The invention provides an information acquiring method for a mobile communicating terminal which includes searching a synchronous sequence signal transmitted by a base station in a downlink synchronous time slot to build a down synchronization; ensuring the location of the broadcasting channel of the base station corresponding to a synchronous sequence signal in a time domain and a frequency domain; receiving the wireless signal transmitted by the broadcasting channel of the base station according to the ensured location to acquire the system information. The invention also provides a terminal and a wireless communicating base station device which adopt the method. The method of the invention acquires a system broadcasting channel and a sub-carrier cluster location that bears the broadcasting channel through identifying the synchronous sequence and can ensure the terminal to quickly and effectively acquire the system information and shorten the time to be accessed into the system. The method can effectively solve the same frequency common-channel interference problem between neighboring synchronous channels and broadcasting channels in a mobile communicating system and is suitable to be adopted in the future broad band mobile communicating system.

Described is a system and method for transporting interference-related control data and other information between nodes in a wireless network, using a control channel that is distinct from a content channel used to transport content. The control channel may be a different channel in the same unlicensed band as the content channel, a channel in a different unlicensed band, or a channel in a licensed band, and thereby not subject to the same interference-related problems that the unlicensed content channel may experience. As a result, management information for adjusting the content channel's communication parameters may still be communicated between the nodes, whereby mitigation actions may occur. For example, the content channel may be changed to another frequency, compression may be implemented or varied, and / or the data transfer rate may be varied. The control data can also be used to change the control channel's communication parameters.

The invention provides a double-communication region electronic nonstop fees- charging roadway system, comprising master control machine, antenna, auto railing, trigger ground sensor, snapping ground sensor, railing drop ground sensor, and fees number display, where the antenna comprises two groups of wireless communication devices with different emitting angles, interconnected through logic processing circuit, and is installed on a gantry and above the roadway, where the far and near communication areas covered by the two groups of wireless communication devices are overlapped. A double-communication region electronic nonstop fees-charging roadway method switches between communication areas according to the position of the vehicle and the trade state under the control of a roadway system, so as to let the normally trading vehicles pass or hold up the illegal vehicles. The invention can solve the vehicle following interference problem and assure the vehicle traffic speed; eliminate the communication blind areas in front of the auto railing to strengthen the ability to process abnormal conditions; reduce the vehicle following interference caused by vehicle backing and stop escaping feesú”prevent viciously jumping the queue from the side road; and assure the vehicles that have traded normally pass.

A control method for a heterogeneous wireless sensor network (WSN) bridging device includes initializing Zigbee sensor nodes, switching a Zigbee transceiver module to a sleep mode, switching a wireless network transceiver module to an active mode, receiving an task list from a remote main control device, switching the wireless network transceiver module to the sleep mode, switching the Zigbee transceiver module to the active mode, transmitting an operating instruction to the Zigbee sensor nodes, receiving at least one sensing signal from the Zigbee sensor nodes, and determining whether the sensing signals have been received. If yes, a back transmission procedure is executed. The control method solves an interference problem among heterogeneous wireless networks and overcomes a bottleneck in data transmission.

The invention discloses a method for solving a problem of adjacent channel interference through multi-antenna co-location, and the method is applied to parallelly-arranged ETC (electronic toll collection) antenna systems. The method comprises the following steps: 1, dividing scaling points; 2, calculating the distances between the scaling points and No.1 and No.2 antennas; 3, determining the basic link transmission losses of the No.1 antenna and the No.2 antenna relative to the scaling points; 4, theoretically calculating an uplink signal strength value of each scaling point received by a No.1 antenna receiver; 5, theoretically calculating an uplink signal strength value of each scaling point received by a No.2 antenna receiver; 6, adjusting the uplink signal strength value of each scaling point received by the No.1 antenna receiver through actual measurement so as to obtain a reference value; 7, adjusting the uplink signal strength value of each scaling point received by the No.2 antenna receiver so as to obtain a reference value; and 8, through carrying out matched fitting with the reference values, determining the position of a vehicle. By utilizing the method provided by the invention, the problem of adjacent channel interference can be solved, and the reliability of the ETC antenna system can be improved.

The invention provides a configuration method of an antenna port. The method comprises the following steps that: when user equipment (UE) accesses a network, a network side determines antenna port resources used by the UE according to rules of configuring different antenna ports by different UE, and the network side informs the UE of configured antenna port resources by using control signaling. By the method provided by the invention, the interference problem among the UE during data receiving is effectively removed.

The invention provides a design method for a sliding mode disturbance observer used for servo system control, and aims at the friction interference problem in low speed of a servo system and considers the error and uncertainty problem of system modeling. A common DC motor model is used, and a disturbance observer and sliding model variable structure control are combined so that the sliding mode disturbance observer is designed. Firstly the size of the friction torque is observed by using the disturbance observer, and then a sliding mode controller is designed according to the obtained friction torque. The switching item gain of the sliding mode controller can be reduced through observation of friction torque so that the buffeting phenomenon can be reduced. Suppression of the low speed servo system for dead zone, creeping, self-oscillation and other nonlinear phenomena can be realized through the sliding mode disturbance observer so that the requirements for the modeling precision can be reduced and the method has great robustness.

The invention discloses a wireless link configuration method and a system thereof. The method comprises the following steps that: base stations send idle frequency spectrum resource applications to center control nodes which the base stations belong to, the center control nodes collect the idle frequency spectrum resource applications and initiate an idle frequency spectrum resource distribution request to database which the center control nodes belong to; the database coordinates and distributes idle frequency spectrum resources between the subordinate center control nodes according to the idle frequency spectrum resource distribution request; the center control nodes response the database so as to complete the idle frequency spectrum resource coordination distribution. By using the method and the system of the invention, an interference problem between secondary systems, which may be generated when a plurality of the secondary systems or a plurality of operators compete against each other for a main system resource, can be solved; simultaneously, fairness for the each secondary system or the operator to access to the main system idle frequency spectrum can be guaranteed; the interference problem which may be generated between the base stations of the secondary systems or the operators can be solved; and the access fairness of the base stations can be guaranteed.