51results about How to "Does not affect bandwidth" patented technology

The invention provides an optical-receiver preamplifier for receiving analog or digital optical signals. The preamplifier comprises a high-gain amplifier A1, an input circuit, a negative-feedback impedor Zf, a low-gain amplifier A2 adjustable in gain and a feedback capacitor Cff, wherein the input circuit takes a photoelectric converter as a main component; the negative-feedback impedor Zf is connected with the reverse input end and the output end of the A1; the feedback capacitor Cff connects the output end of the A2 with the reverse input end of the A1; and the output end of the A1 can be directly connected with the input end of the A2 or can be connected with the input end of the A2 through a buffer. Output signals of the preamplifier are taken out from the output end of the A1 or the output end of the buffer, and can be directly subjected to subsequent signal processing or be further amplified and then subjected to subsequent signal processing.

The invention relates to a communication method for solving problems due to a hidden terminal in a wireless network based on a wireless interference cancellation technique and a node full-duplex mode. Under a wireless local area network physical layer, wireless network nodes are coded into special interference signals by an OFDM (Orthogonal Frequency Division Multiplexing) technology, and overlapped into data signals in the air by means of ''attachment''. The control information and the data information can be transmitted in parallel, thus, the resource consumption on control information can be saved. The nodes for receiving the data information can remove the interference signals by an interference canceling technology in order to obtain the original data. The node for receiving the control information can demodulate the control signal from the mixed signal by an energy detecting technology, so as to obtain the physical address of the node which is transmitting in a collision domain, as well as establishing a relative node list. By inquiring the transmitting state and the receiving state of adjacent nodes, the node can determine whether it is the hidden terminal, so as to avoid transmission of conflict data and increase channel utilization rate.

The invention relates to a network monitoring system for computer hardware processing parameters, belongs to the technical field of computers and aims to overcome a defect that existing computer room environment monitoring system cannot directly monitor computer hardware processing parameters and relative operation systems processing parameters. Accordingly, the invention provides the network monitoring system of computer hardware processing parameters. The network monitoring system comprises a client side and a server side. The client side and the server side are connected in a networking mode. The client side comprises hardware processing parameter acquiring unit, an operation system parameter acquiring unit and a client side network communicating unit. The server side comprises a user interface controlling unit, a parameter processing unit and a server side network communicating unit. The client side acquires various hardware processing parameters and processing parameters provided by an operation system of the computer in regular times, and transmits the parameters to the server side through the network; the server side receives the various parameters transmitted from the client side, determines processing state of the client side, saves the data, and further updates the user interface and displays the state of the client side.

In the present invented device and method, user can transmit command for opening appointed expansion port through main unit according to requirement, and through resolving command to obtain expansion port address, opening passage-way between said expansion port and main unit having said address, finally to proceed operation to said port connected USB equipment, through reporting to notify main unit USB equipment status, then user capable of to appoint operation USB equipment, to raise efficiency and ensure only one USB equipment connected with main unit in time.

The invention discloses a transmission method of a protocol data unit (PDU) and a system thereof. The transmission method comprises the following steps: taking maximum send state variable VT (MS) as a top of a sending window for a radio link control (RLC) layer entity, starting a polling retransmission timer after sending the acknowledged mode data (AMD) PDU carrying poll, then judging whether the send state variable VT (S) of the sending window is equal to VT (MS) in the event that the polling retransmission timer is overtime, and if yes, informing a radio resource control layer of initiating link reconstruction. In the invention, when the polling retransmission timer is overtime, the RLC layer entity judges whether VT (S) is equal to VT (MS), and if yes, the PLC layer entity informs the radio resource control layer of initiating link reconstruction. Therefore, bandwidth is effectively utilized to a greater extent, delay for the reconstruction initiation process is reduced and severe transmission environment is improved timely without affecting the ARQ process.

The invention relates to a novel microstrip line packaging structure of a substrate integrated gap waveguide. The microstrip line packaging structure is formed by three layers of medium plates in an adhesion mode, wherein the medium plates comprise the top layer medium plate (1), the middle layer medium plate (2) and the bottom layer medium plate (3). Periodical metal via holes (4) are formed in the top layer medium plate (1), a metal layer is printed on the upper surface of the top layer medium plate (1), and metallic wound patches (5) are applied to the lower surface of the top layer medium plate (1); chamfered bent microstrip lines (8, 9, 10 and 11) are arranged on the bottom layer medium plate (3), and a metal layer is printed on the lower surface of the bottom layer medium plate (3). A microstrip line is packaged, the problems that irradiation loss, plane waves and cavity resonance exist in a traditional microstrip line are solved, and meanwhile the novel microstrip line packaging structure has the advantages of being simple in structure, small in dimension, large in band width, low in loss, stable in structure and the like, and is easier to integrate and machine.

The invention provides a high-frequency radiator, a multi-frequency array antenna and a base station. The high-frequency radiator comprises two single-polarization radiators of +/- 45 degrees; the single-polarization radiator comprises a radiation arm, a Balun, a feed circuit, a filter and a ground layer. The radiation arm is electrically connected with the Balun; the feed circuit and the Balun are respectively arranged on two surfaces of the first dielectric plate which is vertically arranged; the ground layer is arranged on the downward surface of the second dielectric plate which is horizontally arranged; the first dielectric plate is vertically arranged on the second dielectric plate; the filter comprises a capacitor branch circuit and an inductor branch circuit, wherein the inductor branch circuit is arranged on the same surface of the first dielectric plate as the Balun, the inductor branch circuit is electrically connected with the Balun and the ground layer, and the capacitor branch circuit is coupled with the ground layer; the feed circuit is used for feeding the high-frequency radiator; the filter is used for weakening the influence of the high-frequency radiator on the low-frequency radiator. According to the invention, the problem of common-mode resonance of the high-frequency radiator is solved, the bandwidth of the antenna is not influenced, and the processing cost is low.

The invention relates to a wired network monitor system, which comprises M independent information collectors, a data center and M independent monitored network units, wherein the output terminal of each independent information collector is connected with the input terminal of the data center; the input terminals of the M independent information collectors are connected with the output terminals of the M independent monitored network units; each independent monitored network unit is connected with N independent users; and the N independent users corresponding to each monitored network units are different from the N independent users corresponding to other monitor network units. The wired network monitor system has the advantages that the data collection and analysis is achieved by the information collectors at the outlet of each network unit by adopting a multi-step data processing and centralized control manner; and the information collection policy and the data summarization are achieved by the data center, so that the processing of massive data is distributed to different units to achieve maximally centralized control, thereby reducing the data quantity to be stored. The wired network monitor system can work normally only using a simple network connection, and has the advantages of convenient implementation and simple maintenance.

The invention relates to a communication method, which is based on interference elimination technology and used for solving the problems of exposed terminals in the wireless network. An exposed terminal optimizing method is based on the OFDM (orthogonal frequency division multiplexing) modulation technology, encodes wireless network node information into interference signals by communication interference technology from the physical layer of the wireless local area network. Interference signals carrying node information, namely control information, are overlapped into original data signals in an 'accessory' manner and are transmitted with data information synchronously. By the transmission mode, resource consumption of the control information can be saved greatly, raw data receiving nodes acquire raw data by eliminating interference signals by the interference offset technology, and control information receiving nodes demodulate the control information from the interference signals by energy detection so as to acquire transmitting node lists. Whether the nodes are exposed terminals or not can be judged by the nodes according to a neighbor table acquired from a routing layer, the total throughput of the network can be increased by increasing parallel connections in a collision domain, and space multiplexing rate is increased.

The invention provides a data packet sorting method and system based on a dual-port RAM. The system comprises an input state machine, a dual-port RAM, a register set and an output state machine. The dual-port RAM is respectively in data communication connection with the input state machine and the output state machine, and the register group is respectively in data communication connection with the input state machine and the output state machine so as to realize the data packet sorting method based on the dual-port RAM. According to the invention, the input state machine is matched with the register set; the out-of-order data packets can be stored in the dual-port RAM in sequence, and then the data packets are read out from the dual-port RAM in sequence through the cooperation of the output state machine and the register block, so that the problem of out-of-order output data packet sequence caused by parallel operation of a plurality of algorithm cores of the algorithm module is effectively solved.

The invention relates to a time-prediction-based network synchronization message MD5 encryption apparatus and an encryption method. The encryption apparatus comprises a message receiving module, a message cache module, an MD5 algorithm module, a sending time prediction module, and a message sending module and is characterized in that the message receiving module and the message cache module are connected; the message cache module is respectively connected with the MD5 algorithm module, the sending time prediction module, and the message sending module; the message sending module is respectively connected with the MD5 algorithm module and the sending time prediction module; and the MD5 algorithm module is connected with the sending time prediction module. According to the invention, after starting, the sending time prediction module detects a current message and a next message continuously and predicts sending time of the next message by combining sending time still needed by the current message and calculation time needed for the MD5 encryption algorithm of the next message; after the sending time of the next message is obtained, the MD5 encryption algorithm is started immediately; and then the streamline operation is formed. Therefore, the MD5 encryption algorithm can be carried out successfully.

The invention relates to a method for changing the center frequency of a filter with a superconducting microstrip structure by adopting mask overlay, and belongs to the technical field of microwave communication equipment. The method comprises the following steps of: performing primary simulation designing on a superconducting filter circuit structure according to required filter indexes, manufacturing the designed filter by adopting high-resolution photoetching and ion beam etching processes, comparing a tested response curve with a simulated response cure, modifying an effective dielectric constant in simulation parameters, performing secondary simulation, keeping an inter-resonator distance unchanged, decreasing the length of each resonator in the filter to make the center of a filter circuit with a decreased length reach a required frequency point; manufacturing a mask plate for the overlay, and exposing a cut part in a secondarily-simulated filter circuit pattern; and photoetching and etching the manufactured filter to obtain the filter with required center frequency. The method is accurate in result and low in cost; and simultaneously, good passband response is ensured, and the performance of the filter meets the requirements of actual application.

The invention discloses a line protection and travelling wave fault location integrated device and a travelling wave information inter-station communication method thereof. The method is to enable a protected DSP module and a travelling wave DSP module to realize information interaction with an opposite end through an inter-station communication channel based on an existing inter-station communication module and an existing inter-station communication channel of a power transmission line protection device. A travelling wave communication module transmits travelling wave information by utilizing a standby field of a protected communication data frame. Complete travelling wave information is divided into multiple frames based on the length of the standby field for transmission; a travelling wave communication reception module can splice multi-frame content into complete travelling wave information based on the frame sequential number and the total frame number in the frame head of the travelling wave frame. By adoption of the method, although the protected communication and the travelling wave communication share a communication link, the travelling wave communication does not affect the bandwidth and reliability of the protected communication. After the method is adopted, extra configuration of a dedicated channel or network or network communication channel is unnecessary for a travelling wave fault location function, the communication cost and the maintenance management cost can be reduced, and simplification of the engineering debugging is facilitated.

The invention relates to the technical field of a sensor and particularly relates to a method for utilizing an Ethernet frame clearance to realize sensing detection and overlying communication. According to the method, the Ethernet frame clearance is utilized to realize the sensing detection and the overlying communication. An intelligent sensing device designed according to the method is capable of realizing active detection for remote equipment and monitoring for remote environment, without influencing an original network application and adding network wiring. The application of the method is wide in market prospect.

The invention discloses a method and device for direct communication between terminals in a multipoint conference and a storage medium. The method comprises the following steps: a code stream straight-through request signaling is forwarded to a receiving terminal via a multi-point control unit, a code stream straight-through confirmation signaling which is fed back via the receiving terminal and forwarded via the multi-point control unit is received, and straight-through code stream interaction with the receiving terminal is performed according to the code stream straight-through confirmationsignaling which is fed back. Via the method and device for direct communication between terminals in multipoint conference and the storage medium disclosed in the invention, an MCU can be prevented from code stream forwarding and processing operation, audio and video time delays of the two terminals can be reduced, and usage scenarios of multipoint conference terminals can be enriched while MCU performance and bandwidth remain unaffected.