32 results about "Cognitive module" patented technology

The invention provides a multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method. A radio-frequency module outputs intermediate-frequency data which is used for spectrum detection to determine whether a spectrum is an idle spectrum or not, if so, optimum spectrum analysis and channel estimation are conducted to determine the characteristic of the spectrum, then optimum spectrum allocation is conducted to determine routing lines for information transmission, and when a master user requires to use the current frequency band, other routing lines are selected and used for data transmission; a cognitive module transmits a control signal to the radio-frequency module, wherein the control signal is used for setting the parameters of the secondary frequency variation of the radio-frequency module and setting the communication frequency band of a data transmission module; and each cognitive user has two transmitting and receiving antennas which are used for transmitting and receiving data, and signaling information is transmitted between the cognitive module and the data transmission module and is used for selecting transmission lines and proper transmission power. The method has the advantages that the spectrum utilization ratio is improved, the channel switching times are reduced, the data transmission quality is improved and the goal of stably transmitting cognitive data to the cognitive users is achieved.

A method for regulating network congestion includes the steps of obtaining parameters representing the state of network congestion through a network cognitive module, forming a factor set A with the parameters serving as element factors, then, setting up a network packet loss factor set B, setting the relation matrix of the factor set A and the factor set B, obtaining a cwnd value at the next moment after the factor set A at a certain moment is mapped, and regulating a congestion window of a network sending end according to the cwnd value through a flow control module. Through the method, main factors which influence packet loss are distinguished under different network loads and different error rates, and regulation is conducted according to the main factors. Higher adaptability is achieved compared with a current main TCP, the network performance level can be judged under the condition that the loads are increased and the error rate is high, wireless error packet loss and congestion packet loss are distinguished according to the network performance level, the utilization rate and the handling capacity of links under the high load and high error rate network environment are greatly improved, and therefore transmission performance of the TCP in a heterogeneous network is improved.

A method for neurological rehabilitation is disclosed. The method can be used for listening, comprehension and communication rehabilitation. The methods include a cognitive module, a degraded speech module, a competing speech module, a context module, and an interactive communication module.

The invention relates to a cognitive radio system based on relay cooperation transmission and a resource allocation method thereof. The system comprises a cognitive base station and a plurality of cognitive terminals, wherein the cognitive base station comprises a base station environment cognitive module, a cognitive information library, a wireless resource allocation module and a base station reconfiguration management module; and the cognitive terminal comprises a business state module, a terminal environment cognitive module and a terminal reconfiguration management. The system and the method of the invention takes satisfaction of QoS demands from users and maximization of effective throughput of the system as targets, further has practical meaning, and meets experience requirements of the users. The policies on relay and transmission path selection, frequency spectrum allocation, transmission rate control and other wireless resource allocation are determined based on various useful cognitive information of the system, thereby solving the problem of the wireless resource allocation in the cognitive radio system based on the relay cooperation transmission, optimizing system performance and improving utilization rate of system frequency spectrum.

The invention discloses a communication system capable of having cognitive function based on WCDMA network, mainly for solving the problem of frequency spectrum unreasonable utilization in WCDMA network. The invention is characterized by: adding an IEEE1900.4 defined cognition module in a WCDMA network, wherein a cognitive module service operator spectrum manager (OSM) and a network reconfiguration manager (NRM) are added in a core network (CN), a RAN reconfiguration controller (RRC) and a radio access RAN measure collector (RMC) are added in an UMTS terrestrial radio access network (UTRAN), and a cognitive module terminal reconfiguration manager (TRM), a terminal reconfiguration controller (TRC) and a terminal measure collector (TMC) are added in an user equipment (UE); and defining the transmission message format between the NRM and a mobile switching center (MSC), the RRC and a radio network controller (RNC). Using the system of the invention, users can realize the communication between the unauthorized users and authorized users, therefore the frequency spectrum utilization rate in the system is raised and the irrationality of using frequency spectrum is reduced.

The present invention proposes an intelligent interactive glove with cognitive ability, which includes a multimodal sensing module, a multimodal cognitive module and a multimodal interactive module; the multimodal sensing module is used for acquiring sensor data and voice information Perform dual-channel multi-modal fusion; after multi-modal fusion, the multi-modal cognitive module uses the gesture sensor and the curvature sensor to cooperate to obtain the user's hand posture to perceive the user's behavior, and uses the pressure sensor to detect the user's ability to grab objects. Pressure perception; and measure the distance from the length of the target object, identify the specific information of the object grasped by the user, identify the user's operating object and operation behavior, and enable the glove to obtain the correct curvature data and give the user vibration feedback. Through the present invention, the interactive mode of virtual-real fusion increases the students' sense of experimental operation, enabling students to better understand and memorize the experimental process and phenomena.

The invention relates to a handwriting identification system by using body movement input and a method thereof. The handwriting identification system utilizing the body movement input comprises a body movement input module, a mobile cognitive module and a handwriting identification module, wherein the body movement input module senses the body movement to generate at least one sensing signal, obtains at least one piece of coordinate information after analyzing the sensing signal through the mobile cognitive module, and outputs the coordinate information by simulating a mouse input signal. The handwriting identification module receives the mouse input signal and displays at least one corresponding language according to the coordinate information.

An emotion recognition device, comprising an expression recognition module, a micro-expression recognition module and a weighted fusion module, the expression recognition module is used for mapping expression emotions to a continuous emotional space for recognition, and the micro-expression recognition module uses For identifying subtle emotional changes, the weighted fusion module is used to determine emotional states. The beneficial effects of the present invention are that emotions can be accurately identified.

The invention relates to a media access control method based on separation of cognitive and source sensing nodes in CRSNs. In the method, a cognitive function is separated from a sensor node; the sensor node does not bear a spectrum sensing function any longer and is only responsible for source sensing; the cognitive function is shifted to other special nodes in a CRSN; and the special nodes are responsible for spectrum sensing. On the one hand, the spectrum scarcity in a public frequency band working in a WSN along with rising of all kinds of emerging wireless communication technologies can be alleviated; the problems that a MAC protocol in the WSN does not consider spectrum sensing and spectrum management and the like can also be solved; on the other hand, the problem that the production cost is relatively high due to the fact that the processing complexity and the energy consumption of all the nodes by performing spectrum sensing, spectrum switching and the like are increased and each sensor node is configured with a cognitive module in the MAC protocol of the CRSN can be solved; and the problems of balancing the energy consumption of the network, prolonging the life cycle of the network, increasing the throughput capacity and the like can be well solved.

The invention provides a multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) cognitive radio communication method. A radio-frequency module outputs intermediate-frequency data which is used for spectrum detection to determine whether a spectrum is an idle spectrum or not, if so, optimum spectrum analysis and channel estimation are conducted to determine the characteristic of the spectrum, then optimum spectrum allocation is conducted to determine routing lines for information transmission, and when a master user requires to use the current frequency band, other routing lines are selected and used for data transmission; a cognitive module transmits a control signal to the radio-frequency module, wherein the control signal is used for setting the parameters of the secondary frequency variation of the radio-frequency module and setting the communication frequency band of a data transmission module; and each cognitive user has two transmitting and receiving antennas which are used for transmitting and receiving data, and signaling information is transmitted between the cognitive module and the data transmission module and is used for selecting transmission lines and proper transmission power. The method has the advantages that the spectrum utilization ratio is improved, the channel switching times are reduced, the data transmission quality is improved and the goal of stably transmitting cognitive data to the cognitive users is achieved.