194results about How to "Guarantee signal quality" patented technology

The invention belongs to the technical field of firefighting infrared detection, in particular a helmet type infrared detection and image transmission processing system. The system mainly comprises a front-end transmission system, a background command system and a relay system which transmit corresponding signals through radio waves. The front-end system integrated on equipment of a fire fighter acquires information in a fire, and transmits the information to the relay system and the background command system through the radio waves; and the background command system analyzes corresponding information to provide intuitive fire date and facilitate rescue deployment. The system has the characteristics of small volume, light weight, convenient carrying and the like, realizes functions of discovering rescue targets on the fire scene, acquisition and radio transmission of audio, video and data, image processing, intelligent analysis, real-time display and the like, accords with the development tendency of light, intelligent, high-efficiency and integrated firefighting equipment, and meets actual firefighting requirement and firefighting army assaulting requirement.

The invention discloses an unmanned aerial vehicle optimum relaying location positioning method and system for an unmanned aerial vehicle in the field of wireless communication. The method comprises the steps of establishing a link quality matrix for the unmanned aerial vehicle in a three-dimensional space; calculating a candidate optimum relaying location from the link quality matrix, wherein the unmanned aerial vehicle flies to the candidate optimum relaying location according to a shortest path; in a flying process, continuously communicating with a sending end and a receiving end, sampling to obtain the link quality; updating the whole link quality matrix through a matrix recovery method each time when new sample point data is obtained; and finishing positioning when the current location of the unmanned aerial vehicle is the optimum relaying location, otherwise reselecting the candidate optimum relaying location from the updated link quality matrix, updating the path and flying to the new optimum relaying location. According to the method and the system, the optimum relaying location of the unmanned aerial vehicle can be searched in the three-dimensional space rapidly and automatically to transmit signals between two points in the space, barriers and dynamic environments of the space can be adapted automatically, and the signal quality is ensured.

The invention relates to a heterogeneous network multi-base-station energy-saving management method. The method includes the steps of S1, executing the step S2 when a network is in a normal working state and executing the step S4 when the network is in an energy-saving working state; S2, obtaining service parameters of a micro base station, entering the sleeping state if meeting sleeping conditions, and switching users to other adjacent base stations capable of containing the residual service volume; S3, obtaining service parameters of a macro base station, entering the sleeping state if meeting sleeping conditions, conducting coordinative compensation through other adjacent base stations capable of containing the residual service volume, and executing the step S6; S4, obtaining service parameters of each base station, executing the step S5 if meeting annular conditions, and executing the step S6 otherwise; S5, starting the base stations, in the sleeping state, of the network; S6, optimizing and adjusting transmission power of other base stations which conduct coordinative compensation on the target macro base station. By means of the method, the flexible coverage of network communication service can be ensured, the user signal quality can be maintained, the network multi-coverage can be reduced, and the network recovery complexity can be lowered.

The invention discloses an assistance system for disabled people based on a brain control mobile eye and a control method for the assistance system. The system comprises vision inducing equipment, signal acquisition equipment, a signal processing module and peripheral control equipment, wherein the vision inducing equipment is used for providing a user interaction interface of the whole system, and a user carries out control by using the interface; the signal acquisition equipment is used for acquiring the brain electrical activity of the scalp, converting an acquired analog signal into a digital signal and transmitting the signal to the signal processing module; the signal processing module is used for analyzing acquired data in real time and controlling an experimental process; the peripheral control equipment comprises the mobile eye and a wheelchair; the mobile eye comprises an intelligent trolley and a camera holder arranged on the intelligent trolley; the peripheral control equipment can do corresponding motion according to a control instruction sent by the signal processing module. According to the assistance system for the disabled people based on the brain control mobile eye and the control method for the assistance system, the safety of wheelchair control can be improved.

The invention provides a method for setting the LTE network in a high-speed rail environment. The LTE network comprises N base stations and antennae, wherein N is larger than 1, the base stations are distributed on the two sides of a railway in a stagger and zigzag mode, the incidence angle theta of each base station is not smaller than 10 degrees, the vertical distance D between each base station and the edge of the railway meets the inequation that S/2*tan theta<D<S/2, S represents station spacing, and theta is the minimum incidence angle. By the adoption of the method, through targeted network plan of the high-speed rail scene, the high-quality LTE network can be provided for an operator, adverse effects caused by various factors during high-speed running of a train are reduced, signal quality is guaranteed, and user experience is improved.

The invention discloses a wearable electroencephalogram acquisition device. After the device is worn on the head of a user, an electroencephalogram signal of the user is extracted by a surface electrode on the device, then the extracted electroencephalogram signal is input to a dual channel analog front end and is subjected to filtering, amplification and analog-digital conversion in sequence; a digitalized electroencephalogram signal is obtained and is input to a wireless transceiver, and the wireless transceiver packages the digitalized electroencephalogram signal and sends the signal to terminal equipment by a built-in radio frequency antenna. In a specific processing process, the kernel of the wireless transceiver processes a quantized signal and feeds back to an analog front end in real time for adjusting the work state of equipment, and the high-efficiency and low-power-consumption acquisition and transmission of the electroencephalogram signal is ensured.

The invention relates to an all-fiber current transformer for an open loop independent double-sampling circuit based on a single light path. The all-fiber current transformer comprises a phase modulation module, a photoelectric detector, a first AD switching circuit, a second AD switching circuit and a double-sampling data processing unit, wherein the phase modulation module comprises a square wave control circuit, a DA switching circuit and a phase modulator which are connected with each other in turn; the phase modulator is arranged in the single light path; the first AD switching circuit and the second AD switching circuit are both connected with the photoelectric detector and the double-sampling data processing unit; the sequence signals in the double-sampling data processing unit and the square wave control circuit are synchronous to each other. The structure adopting the single light path, double AD sampling, respective modulation and synchronous matching square wave for controlling DA switching is adopted by the invention, so that the problem of FOCT (Fiber Optical Current Transformers) dual configuration is solved and the all-fiber current transformer has the advantages of simple structure, small volume, low cost, high integrated degree, and the like.

Embodiments of the present invention relate to a signal identifying method, including: obtaining signal characteristics of a current frame of input signals; deciding, according to the signal characteristics of the current frame and updated signal characteristics of a background signal frame before the current frame, whether the current frame is a background signal frame; detecting whether the current frame serving as a background signal frame is in a first type signal state; and adjusting a signal classification decision threshold according to whether the current frame serving as a background signal frame is in the first type signal state to enhance the speech signal identification capability.

The invention discloses a method and device for optimizing load balancing. The method comprises the steps of: when judging that a cell of an eNB (evolved Node) needs to be subjected to load balancing by the eNB, selecting all the UEs (User Equipment) or part of UEs in the cell, and adjusting threshold parameters of switching events, then sending the threshold parameters to the selected UEs; and according to measurement reports and load condition of the cell reported by the UEs, selecting one or more UEs for switching by the eNB. According to the method, while the load of a source cell is reduced, the signal quality after the switched UEs are switched to a target cell can be guaranteed, so that the ping-pong switching is avoided, and the UEs unnecessarily must be switched to a cell of the same coverage or inclusion relation.

The invention discloses a space division multiple access (SDMA) protection method of an edge user of a cell in an HSDPA system. The method comprises the following steps: A1. acquiring SDMA user information of the cell and recording reporting information of various users; and A2. judging whether any user is on the edge of the cell according to the reporting information of various users, if yes, executing the step A3; A3. deleting the user from an SDMA user collection and transmitting data for the user by a CDMA method. Therefore, when the SDMA user is on the edge of the cell and the signal is weak, the data is not transmitted by the SDMA method, which can ensure the signal quality and avoid occurrence of error blocks; when a non-SDMA user satisfies the condition of data transmission by the SDMA method, the non-SDMA user is added to the SDMA user collection, and the data is transmitted by the SDMA method for the user. The method has the advantages of flexible application, convenient implementation and effective protection for the signal quality of the edge user.