1840 results about "Radio transmission" patented technology

In an organic memory which is included in a radio chip formed from a thin film, data are written to the organic memory by a signal inputted with a wired connection, and the data is read with a signal by radio transmission. A bit line and a word line which form the organic memory are each selected by a signal which specifies an address generated based on the signal inputted with a wired connection. A voltage is applied to a selected memory element. Thus writing is performed. Reading is performed by a clock signal or the like which are generated from a radio signal.

A method of determining the location of a mobile device is provided. The method receives a signal with a known radio transmission pattern at the mobile device from each of several transmitting devices. The method correlates each received signal with a corresponding signal that has a same known radio transmission pattern to determine the time the signal traveled between the corresponding transmitting device and the mobile device. The method determines the location of the mobile device based on the time the signal travelled between the corresponding transmitting device and the mobile device. In some embodiments, determining the location of the mobile device does not require calculating a distance between the mobile device and any of the transmitting devices. In some embodiments determining the location of the mobile device includes solving a function that is dependent on the time the signals traveled between each corresponding transmitting device and the mobile device.

The present invention relates to a method and apparatus for using a RFID reader network to provide a large operating area, thereby enabling multiple RFID readers to simultaneously operate with minimal interference among all the RFID readers in the same network. The RFID network comprises a plurality of RFID readers connected to a server via a network backbone. Each operating RFID reader is associated with a group of neighboring RFID readers. A neighboring RFID reader is defined as a RFID reader that can detect tag responses for the communication between the operating RFID reader and its RFID tags. Each operating RFID reader sends its neighboring RFID readers at least one Tag Operation (TO) packet before starting to communicate with RFID tags and at least one End of Tag Operation (ETO) packet after the tag operation is completed. To avoid interference, each RFID reader uses a listen-before-talk scheme in which it checks if any TO packet has been sent by neighboring RFID readers before starting radio transmission. If both RFID readers are allowed to transmit, the RFID reader with a neighboring RFID reader just finishing transmission has the higher priority. This approach improves the throughput by taking advantage of the overlapped areas of neighboring RFID readers.

A flexible medical intubation instrument provided for placement into an animal or human patient comprises a catheter with at least a pair of longitudinally extending lumens or channels including a sensor and/or actuator channel and a working channel. In the sensor/actuator channel is provided a fixed or slideably removable sensor cable having a sensor for sensing a characteristic or condition including any of the following: a visual sensor for optical viewing, a chemical sensor, a pH sensor, a pressure sensor, an infection sensor, an audio sensor, or a temperature sensor. The sensors are coupled by the sensor/actuator cable through light transmission, electric current, or radio transmission to a viewing instrument or other output device such as a meter or video screen for displaying the condition that is sensed within the body of the patient while the flexibility of the composite structure comprising the catheter and cable enable the entire instrument to flex laterally as it moves through curved passages or around obstructions during insertion or removal. While making observations through the sensor channel, the working channel simultaneously functions as a drain or an irrigation duct, a feeding tube, or to provide a passage for the insertion of one or a succession of surgical devices such that the catheter serves as a protective artificial tract or liner as surgical devices are inserted and removed through it in succession so as to minimize tissue trauma, infection, and pain experienced by the patient. The instrument can be used in urology, as well as a visually directed nasogastric tube, as a visually directed external gastrostomy tube, or as a visually directed internal gastric tube or percutaneous endoscopic gastrostomy tube and in other applications.

The invention concerns a method and an apparatus implementing the method. In the method at least one synchronization signal is received from a base station to a mobile node, which determining timing based on the at least one synchronization signal, for example, a group of orthogonal frequency division multiple access resource elements. The mobile node transmits an uplink radio resource reservation request to a base station. The mobile node receives from the base station an assignment of a radio resource dedicated for radio transmission to a remote node, the radio resource being within a band having a transmission power upper limit. The mobile node transmits a signal to the remote mobile node on the radio resource based on the timing determined.

The user receives a digital radio transmission through a digital receiver and transmits a request to download selected content from this transmission to a content agent, an entity responsible for authorizing the authorized downloading of the digital content. If the content is not free of charge, the user also transmits sufficient information to allow for payment for the digital. The user then receives a transmission authorizing the downloading of the digital content from the content agent upon acceptance of the payment by the content agent. The user then downloads the content to a storage device which is coupled to the receiver.

A radio-to-SIP adapter is shown to include a voice detection algorithm processor as well as other circuitry to provide an interface between a radio and SIP adapter to accommodate a transition from half duplex to full duplex and to cause a radio to transmit when human speech is present in an audio signal from a telephony network.

An impulse radio communications system using one or more subcarriers to communicate information from an impulse radio transmitter to an impulse radio receiver. The impulse radio communication system is an ultrawide-band time domain system. The use of subcarriers provides impulse radio transmissions added channelization, smoothing and fidelity. Subcarriers of different frequencies or waveforms can be used to add channelization of impulse radio signals. Thus, an impulse radio link can communicate many independent channels simultaneously by employing different subcarriers for each channel. The impulse radio uses modulated subcarrier(s) for time positioning a periodic timing signal or a coded timing signal. Alternatively, the coded timing signal can be summed or mixed with the modulated subcarrier(s) and the resultant signal is used to time modulate the periodic timing signal. Direct digital modulation of data is another form of subcarrier modulation for impulse radio signals. Direct digital modulation can be used alone to time modulate the periodic timing signal or the direct digitally modulated the periodic timing signal can be further modulated with one or more modulated subcarrier signals. Linearization of a time modulator permits the impulse radio transmitter and receiver to generate time delays having the necessary accuracy for impulse radio communications.

A disaster alert system and disaster alert devices for use in the system. Each disaster alert device includes a radio receiver, and a processor programmed to monitor radio transmissions from one or more central stations for disaster alerts directed to the location of the disaster alert device. Each alert device also includes an audio unit to alert personnel located at the site of the device to the precise nature of the disaster. The disaster alert devices are pre-programmed with information identifying the precise use location of the warning device. This use location information includes latitude and longitude of the use location and may also include other location information such as street address and zip code. Warnings are broadcast from central stations identifying with latitude and longitude information specific at-risk regions to which the warnings are directed which could be, for example, nationwide, statewide, countywide, or to much smaller regions, such as several houses on a single street or even a single residence. Each disaster alert device is preferably programmed to ignore all warnings directed to at-risk regions that do not include the latitude and longitude of the use location of the device.

Aspects of a method and system for transmit power control techniques to reduce mutual interference between coexistent wireless networks are provided. A coexistence terminal comprising a WLAN radio and a Bluetooth radio operating as a master device may transmit signals to one or more remote controllers comprising a slave Bluetooth radio to increase transmission power when the isolation between the coexistence terminal's WLAN and Bluetooth radios is below a threshold. Link manager protocol (LMP) signals may be utilized for changing the transmission power. When the isolation increases above the threshold, signals may be generated to reduce the remote controllers' transmission power. In some instances, in addition to increasing the transmission power of remote controllers, the transmission power of the Bluetooth radio or the WLAN radio may be reduced. The reduced Bluetooth or WLAN radio transmission power may be increased when the radio isolation in the coexistence terminal increases.

A pulse measuring apparatus comprises a pulse sensor unit having a pulse sensor, a pulse measuring instrument having a display section for displaying a pulse number, and an arm wearing band fixed to the pulse measuring instrument and to which the pulse sensor unit is attached so as to be capable of adjusting its position in a longitudinal direction. A radio transmission section is disposed in the pulse sensor unit and a radio reception section is disposed in the measuring instrument, whereby data can be radio-transmitted from the pulse sensor unit to the measuring instrument. The data to be radio-transmitted is a pulse detection signal of the pulse sensor of the pulse sensor unit, or a pulse number obtained by calculation-processing the pulse detection signal by a signal processing section of the pulse sensor unit.

A time domain communications system wherein a broadband of time-spaced signals, essentially monocycle-like signals, are derived from applying stepped-in-amplitude signals to a broadband antenna, in this case, a reverse bicone antenna. When received, the thus transmitted signals are multiplied by a D.C. replica of each transmitted signal, and thereafter, they are, successively, short time and long time integrated to achieve detection.

The invention discloses a special photoelectric nacelle of a power patrol unmanned helicopter, which comprises an airborne part and a ground part, wherein the airborne part comprises a fixed part which is positioned in the upper part, a rotatable part which is positioned in the lower part and a servo control assembly; the rotatable part comprises a gyroscope stable rotating tower; the fixed part comprises an electronic control cabin; cables between the electronic control cabin and the gyroscope stable rotating tower are connected by a conducting slide ring which can support the gyroscope stable rotating tower to rotate by nx360 degrees; and the airborne part of the photoelectric nacelle is suspended on the helicopter by a vibration reducing device and communicated with a flight control system of the helicopter. The special photoelectric nacelle is a photoelectric task load with compact structure and high performance, can meet the requirement for remote power patrol, has self-stabilizing function and self-tracing function, can shoot a target to be traced from an image in real time, transmit the target to a ground control vehicle by a radio transmission system on an aerial carrier and is convenient for a patrol parson to directly master the scene condition to improve the efficiency of power patrol.

An optical fiber radio transmission system is provided which is capable of considerably improving the received dynamic range of radio signals and, in addition, is capable of optically transmitting radio signals while preventing the deterioration of transmission performance and the loss of linearity of an input signal more easily. A received level detection section 111 detects which one of predetermined levels, i.e., Level I, Level II, and Level III, the received level of a radio signal received by an antenna 400 falls under. A signal control section 112 performs an amplification/attenuation process on the radio signal in accordance with the detected level. A control information sending section 113 superimposes control information indicating the detected level on a primary signal obtained after the amplification/attenuation process. This signal is converted to an optical signal and transmitted. An optical to electrical conversion section 211 converts the optical signal received from a transmitting unit to an electrical signal. A control information extraction section 212 extracts the level from the control information, which has been superimposed on the primary signal. A signal control section 213 performs an amplification/attenuation process on the primary signal in accordance with the extracted level.

The present invention provides an apparatus and method of radio transmission of real-time IP packets using header compression technique. In the present invention, the size of a compressed header of an RTP packet can be adapted to length types required by the system by adding a radio link adaptation unit to the existing PDCP entity. The method comprises header-compressing the RTP packets, to obtain header-compressed RTP packets having a plurality of different header compression lengths; pre-configuring header compression lengths and length types required by the system; and PDU-size adapting the plurality of different header compression lengths of the header-compressed RTP packets, so as to comply with said lengths and length types required by the system.

A system is disclosed in which a geographic area of interest can be selected, and information corresponding to the selected area can be downloaded and displayed by a user in an efficient and timely manner. The geographic area of interest may initially be selected by various input means such as a map, longitude/latitude coordinates, a global positioning system (GPS), and the like. Once the particular geographic area has been selected, geographic information corresponding to the selected area is downloaded to the user. The geographic information may include photographic images, radar, radio transmission, cell phone transmission, time sequenced images, ground moving target information, air moving target information, maritime moving target information, red or blue force identification and/or potential hazard areas information. The geographic information may be stored in a suitable data storage system such as a server. Alternatively, the geographic information may be generated real time and downloaded to the user. In one embodiment, the geographic information includes photographic images and a relatively low resolution image of a large geographic area is initially displayed to the user. The user can then select a limited region of the photographic image for closer viewing. The limited region of the photographic image may then be downloaded to the user in a higher resolution format, thereby reducing the amount of high resolution data that must be transmitted to the user. Various display devices may be used, such as personal data assistants (PDAs), laptop computers, desktop computers, vehicle-mounted computers, tablets, cell phones and the like. The display device may also be used as the input device to both select the geographic area of interest and display the photographic images or other geographic information of the selected area.

A cellular radio telecommunications system and method of operating the same is described which includes a first cellular radio telecommunications network for providing frequency division duplex radio transmissions over an air interface to one or more fixed or mobile terminals and a second cellular unidirectional radio telecommunications network which at least partly overlaps the first cellular radio telecommunications network for providing unidirectional simplex radio transmissions over an air interface to the one or more fixed or mobile terminals. At least one of access to the unidirectional second cellular network and handover of a communication supported by the unidirectional second cellular network is managed by the first cellular network. A special dedicated uplink channel may be provided in the first network for trasmitting uplink control and/or error messages of the second network.