1874 results about "Radio transmission" patented technology

A system and method for monitoring vital signs and capturing data from a patient remotely using radiotelemetry techniques. The system is characterized by a cordless, disposable sensor band with sensors form measuring full waveform ECG, full waveform respiration, skin temperature, and motion, and transmission circuitry for the detection and transmission of vital signs data of the patient. A small signal transfer unit that can either be worn by the patient, e.g., on his or her belt, or positioned nearby receives data from the sensor band, which it then forwards by e.g., radio transmission to a base station that can be located up to 60 meters away. The base station receives data transmissions from the signal transfer unit and is designed to connect to conventional phone lines for transferring the collected data to a remote monitoring station. The base station may also capture additional clinical data, such as blood pressure data, and to perform data checks. Patient safety is enhanced by the ability of the base station to compare clinical data, e.g., ECG, against given profiles and to mark events when appropriate or when the base station is programmed to do so. Such events are indicated to the physician and could be indicated to the patient by reverse transmission to the signal transfer unit. A remote monitoring station allows the presentation and review of data (including events) forwarded by the sensor band. ECG analysis software and a user-friendly graphical user interface are provided to remotely analyze the transmitted data and to permit system maintenance and upkeep. The system of the invention has useful application to the collection of patient clinical data during drug trials and medical testing for regulatory approvals as well as management of patients with chronic diseases.

A body worn patient monitoring device includes at least one disposable module including a plurality of electrical connections to the body. The body worn patient monitoring device also includes at least one communication-computation module, the communication-computation module having at least one microprocessor to actively monitor the patient and to perform a real-time physiological analysis of the physiological signals. A radio circuit communicates a raw physiological signal or a result of the physiological analysis at a predetermined time or on the occurrence of a predetermined event, via a radio transmission to a remote radio receiver, wherein the at least one disposable module is mechanically and electrically coupled directly to the at least one communication-computation module. The body worn patient monitoring device, including the at least one disposable module and the at least one communication-computation module, is directly non-permanently affixed to the skin surface of the patient.

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 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.

The invention pertains to transmission to a remote station, by means of transmission channels (generally radio transmission channels), of seismic data acquired by a data collection equipment comprising a plurality of acquisition units, each being suited to acquire, to store and preferably to compress the data to be transmitted. The invention comprises ordered storage, in a high-capacity memory (flash type memory for example) of each acquisition unit (Ai), of data obtained during successive emission-reception cycles (acquired and possibly preprocessed seismic data) so as to form a stream of stored data to be transmitted, and progressive transfer of the stored data stream from each acquisition unit to the remote station by means of the transmission channel, by reading each storage memory, with a time lag in relation to the time of their storage depending on the transmission rate of each transmission channel and on the transmission mode selected with preferably, if sending of the data of a cycle is delayed, sending of at least partial data, compressed or not, for quality control purposes. The data transmitted are reconstituted at the remote station. The method can be used for large-scale seismic data transmission.

In order to utilize several radio communication systems with a radio terminal 1, by preparing the common modulator and demodulator part 2a and reconfigurable modulator and demodulator part 2b in advance and performing function selection means 4 with specified means of differential information 5 which information consists of the list of differential specification information of each radio communication system such as the tap coefficients of filter, frame format and the like, and their hardware address to allocate the information into digital signal processing hardware, the required radio communication systems are realized as users like.

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 virtual wireless local area network system and method utilizing impulse radio wherein transmission rates (bit rates) can vary according to the impulse radio transmission quality (signal to noise ratio) and wherein the position of the user can be determined and said user can be directed to an area of greater transmission rates and wherein a plurality of impulse radio portals can be utilized and switched between to maintain high levels of transmission rates while a user is moving within a predetermined area.

A weather station for providing weather information to a user, especially weather information related to lightning and severe thunderstorm activity. In accordance with the present invention, the weather station includes one or more antennas for receiving GPS transmissions, weather radio transmissions, and a separate radio band, such as the AM radio band for use in detecting lightning strikes. The GPS signal is used to determine the position of the user. A lightning detector coupled to the antenna for receiving the AM (or other band) signal calculates the proximity of any detected lightning strikes. The national weather radio band antenna receives information from NOAA and similar organizations and presents it to the user in the normal fashion. In accordance with the present invention, the weather station may take storm data from NOAA and compare it to lightning proximity data that it has already obtained at a particular location and present to the user an indication of the relative location of the severe thunderstorm activity and its direction of movement.

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.

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.

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.

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 present invention provides for a system and method for improvement of radio transmitter and receiver frequency accuracy for a local radio communication unit that communicates digital data with a remote communication unit. In the local unit the received radio signal is down-converted, and converted to complex baseband digital samples by an analog-to-digital converter. A downlink digital phase rotator applies a fine frequency shift to the samples in accordance with a receiver frequency offset command. The resultant baseband signal is used by the data demodulator and by a receiver frequency error estimator to obtain receiver frequency errors. A data modulator generates baseband complex samples which are shifted in carrier frequency by an integrated uplink digital phase rotator in accordance with a transmitter frequency offset command. The modulated samples are then converted by a digital-to-analog converter and upconverted in frequency for radio transmission to the remote unit. The local oscillator signals for both upconverter and downconverter are phase locked to a reference frequency generated by a VCXO. An automatic frequency control (AFC) function nulls the transmitter and receiver frequency error by the frequency adjustment commands to the uplink and downlink phase rotators or to the VCXO digital-to-analog converter (VCXO DAC) by feedback control principals based on measured receiver frequency error. During frequency track mode when communications between local and remote units are possible, the AFC only adjusts radio frequency via phase rotator commands and the VCXO command remains fixed, thereby avoiding communications performance degradation by VCXO frequency quantization error due to the VCXO DAC. The AFC adjusts VCXO frequency only during a preliminary acquisition mode prior to data communications, or to back out excessively large frequency offsets accumulated in the downlink and uplink phase rotators during track mode. When a VCXO adjustment is made in track mode, phase rotator adjustments are simultaneously applied to cancel the errors in transmitter and receiver radio frequencies caused by the step change due to VCXO frequency quantization thereby mitigating VCXO frequency quantization noise.

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.

As no single wireless network can provide both broadband high-speed radio transmission and seamless full mobility for commercial wireless communications in terms of technology, cost, spectrum and performance, a new wireless converged network access infrastructure based on Open Wireless Architecture (OWA) has been disclosed, wherein the spectrum is separated into low spectrum band (LSB) for wide area seamless mobility networks and high spectrum band (HSB) for very high-speed broadband wireless access systems in order to maximize the spectrum utilization efficiency for the converged multiple wireless access networks of the fully service-oriented wireless communications including multimedia broadcast and multicast service.

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.