39results about How to "Avoid radio interference" patented technology

The invention relates to a cognitive radio (CR) WiFi network which includes a plurality of radio environment aware WiFi terminals, which collect local WiFi interference information and send this information to a CR network management system (NMS). The CR NMS includes a database for storing historical records of the interference information obtained from the terminals, and cognitive engines for analyzing the stored historical interference records and determining terminal-specific transmission and reception parameters. In one embodiment the network implements a deterministic NMS-directed networks-wide TDD/TDM scheduling of WiFi communications for optimal channel re-use and interference avoidance, and a novel terminal synchronization mechanism.

Each node or terminal in a communication network is capable of generating routing information for routing packets from an arbitrary source terminal to an arbitrary destination terminal on both a single-path route and a multipath route. The routing information is placed in packets transmitted to neighboring communication terminals, and analyzed in packets received from neighboring terminals. The single-path route is spatially or temporally separated from the multipath route so that the single-path route does not receive interference from the multipath route. Temporal separation may be effected by suspending the transmission of packets temporarily at each communication terminal on the multipath route. Spatial separation may be effected by using the routing information to designate different zones in the network, the single-path route being disposed in one zone, the multipath route in another zone.

A system and method for communicating over networks, particularly generally-linear networks such as a netowrk of railcars in a railway train. The disclosed system and method include the relaying of packets which may contain plural messages down a line of nodes. Acknowledgement of the packets is obtained implicitly by listening to a subsequenct relay of the packet and retransmission of the packet is effected on a diverse antenna in the event of non-acknowledgement. Message bandwidth is shared among the nodes of the system by a message priority system and by the reservation of portions of a packet for certain types of messages. Message bandwidth is also shared by the use of groups of nodes as relay particpiants and by periodically changing the group which is peforming the relay operations.

A pneumatic tire wherein at least 75% by weight of tire-constituting components based on the tire overall weight are made of nonpetroleum-based materials and wherein, at least, base rubber 2G2 and cap rubber 2G1 of tread rubber 2G, sidewall rubbers 3G and a topping rubber of carcass 6 are formed of an insulating rubber material, wing rubbers 2G3 of tread rubber 2G are formed of an electrically conductive rubber material, and sidewall portions are provided with at least one electrically conducting path 20 formed from a ribbon-like conductive rubber strip 21 made of an electrically conductive rubber material and having a width Ws of 10 to 40 mm, in which the conductive rubber strip 21 extends linearly in a radially inward direction from an electrically conducting part 21A contacting the wing rubber 2G3 to reach clinch rubber 4G.

A radiocommunication apparatus includes a transmitting device and a receiving device. The transmitting device includes a first local oscillation section for selecting a frequency for a first local oscillation signal from a plurality of predetermined frequencies in order to output the first local oscillation signal, and a first frequency mixing section for mixing an input signal and the first local oscillation signal, thereby forming a transmission signal. The receiving device includes a second local oscillation section for selecting a frequency for a second local oscillation signal from the plurality of predetermined frequencies in order to output the second local oscillation signal, and a second frequency mixing section for mixing a received signal and the second local oscillation signal, thereby forming an output signal. The frequency for the first local oscillation signal and the frequency for the second local oscillation signal are selected such that the frequency for the first local oscillation signal and the frequency for the second local oscillation signal are identical to each other.

The invention discloses a method and a system of locating a beacon by using phases. The system comprises the beacon and a receiver. The beacon comprises a radio station used for transmitting radio wave signals, a controller used for controlling the working of the radio station, and a power supply management module used to supply the controller and the radio station with power. Whether the radio station is electrified by the power supply management module is controlled by the controller. The receiver comprises more than three antennas, a signal source used for transmitting fixed-frequency signals S, a mixer used for the mixing processing of the radio wave signals and the fixed-frequency signals S received by the antennas, a low pass filter used for the filtering processing of the signals after the mixing processing, and a measuring chip used for measuring time differences. The system provided by the invention is advantageous in that only the radio station is required, and no GPS modules are required, and the radio station is only required to be switched on for a little while (smaller than 0.1s) during the use, and is used to transmit the small segment of the radio wave signals, and therefore power consumption is small; only the radio station is required, and no GPS modules are required, and therefore only one antenna is required, and the size of the system is reduced.

To increase an area in which a component can be mounted in a substrate including an IC chip to which an antenna is connected. For this purpose, an opening at the center of a center substrate is provided with an IC chip. An antenna is wired to an upper surface of the center substrate so as to enclose the IC chip. A top substrate is laminated and fixed on the upper surface of the center substrate. A bottom substrate is laminated and fixed on a lower surface of the center substrate. Since the antenna is not wired to an upper surface of the top substrate and a lower surface of the bottom substrate, a component can be mounted on the entire upper and lower surfaces. This allows a large number of components to be mounted.

The present invention is to provide a wireless communication system that is capable of preventing occurrence of radio interference caused by radio wave used by a radio wave generator without requiring any improvement of existing wireless devices. The wireless communication system of the present invention includes: a radio wave generator (1) that uses at least a radio wave in a frequency band that overlaps a frequency band used by a wireless standard; and wireless devices (AP, STA) each of which uses a radio wave conforming to the wireless standard. The radio wave generator (1) transmits a dummy frame conforming to the wireless standard to the wireless devices near the radio wave generator (1) before generating the radio wave in the same frequency band as the frequency band used by the wireless standard. When the wireless devices (AP, STA) receive the dummy frame, the wireless devices (AP, STA) control themselves to stop using the radio wave in the frequency band that has radio interference caused by the radio wave generated from the radio wave generator (1).

The invention discloses a low-power-consumption chip architecture system with multiple wake-up source inputs. The low-power-consumption chip architecture system comprises a power management circuit, awake-up logic circuit, a timing detection circuit, a low-frequency clock, a main circuit, a clock selector and a high-frequency ring oscillator, the power supply management circuit is used for controlling the power supply input of each circuit to open or close; the wake-up logic circuit is used for acquiring a wake-up signal sent by the timing detection circuit module and sending a correspondingcontrol signal to the power supply management circuit; the timing detection circuit is used for detecting an external wake-up signal to judge a trigger action and sending the wake-up signal to the wake-up logic circuit; the low-frequency clock circuit is used for providing a working clock for the awakening logic circuit and the timing detection circuit; wherein the main circuit is used for processing data and is connected with the awakening logic circuit through a communication port; the clock selector is used for selecting a high-frequency ring oscillator or an external crystal oscillator clock as a clock input into the main circuit; and the high-frequency ring oscillation circuit is used for providing frequencies of multiple gears for the main circuit to use.

Various embodiments related to a near-field (short-range) communication antenna device, which is used for an electronic device, are disclosed. According to an embodiment, a near-field (short-range) communication antenna device may comprise: an electronic device cover unit; a circuit board provided inside the cover unit; a near-field (short-range) communication module, which is mounted on the circuit board, and which comprises a transmitting module and a receiving module; and first and second dielectric body units that face the transmitting module and the receiving module. In addition, various other embodiments are possible.

A synchronization method and system of control sequence numbers is provide to achieve radio link control sequence number synchronization between different network elements. This method includes the following steps: allocating a preset radio link control sequence number to a first radio link control protocol data unit corresponding to a first packet in a data burst and successively allocating a radio link control sequence number to subsequent radio link control protocol data units corresponding to packets of this data burst, when each designated network element in a plurality of designated network elements performing radio link control protocol process on the packets in the data burst received by said each designated network element.

The present invention provides a battery unit for a vehicle which can avoid the interference of electric wave generated to the outside and the inside of a battery shell due to the electric noise of acable. The battery unit for the vehicle (10) is provided with: a battery module (M) formed by stacking a plurality of battery cells; a battery case (11) that houses the battery module (M); a connectorsection (C) arranged in the battery case (11); and a cable (33) that electrically connects the connector section (C) and the battery module (M). The battery case (11) is provided with a metal frame beam (15) having a hollow section (25). The cable (33) is disposed in the hollow section (25) of the frame beam (15).

The invention discloses a power transmission iron tower high-altitude operation audio-video transmission system. The system comprises a helmet, a safety belt, a ground terminal and a high-altitude operation special interphone, wherein the helmet is provided with a standard-lens camera and a wide-angle lens camera, the safety belt is provided with a wireless audio-video emitter, and the wireless audio-video emitter is provided with an antenna. According to the invention, by use of a portable miniaturized double-image transmission system, i.e., the wide-angle lens camera and the standard-lens camera, wide-angle and high-definition images of work personnel in construction operation, shot by the wide-angle lens camera and the standard-lens camera can be transmitted to a controller in the ground terminal in real time; and the high-altitude operation special interphone can transmit voice signals of the work personnel in the construction operation in real time to the controller in a ground system.