1814 results about "Radio receiver" patented technology

A portable music device (PMD) for capturing song tags while monitoring a broadcast (via Internet or radio), either on the PMD (either via an Internet connection or via a built-in FM radio receiver), or on a nearby radio (by detecting the station to which the nearby radio is tuned). The user can use the captured song tags to download song files, either on the Internet or in a physical music shop. Song tags may be ID3-type tags modified to include a link to a web address of a server for downloading songs. The PMD may also store credits for paying for the songs, and may include a contactless interface for secure payment.

The key of the invention is to introduce an interoperability device in a communication system which integrates an IEEE 802.11 transceiver and a Bluetooth transceiver. The device prevents that one transceiver is transmitting while the other is receiving, which would cause interference at the receiving transceiver. In addition, the device preferably prevents that both systems are transmitting at the same time to avoid interference at the receiving device(s). Optionally the device prohibits simultaneous reception of both transceivers. In that way the radio receiver can be shared between the devices, allowing a cheaper and smaller hardware design.

A conventional portable cellular phone modified such that the phone housing incorporates a digital cameras security alarm system and other functions. In another embodiment, the portable cellular phone is modified such that the phone housing incorporates a security alarm system, radio receiver and other functions.

A combined wireless transceiver and signal conversion unit comprises a radio receiver for receiving a wireless radio signal, and a converter for converting the signal into a form having a communications protocol supported by a communications port of a user digital device. An output device is provided for transmitting the converted signal to a user digital device via a wireline or other suitable medium for carrying the converted signal. The unit includes an input device for receiving a communications signal from the communication port of a user digital device via a wireline or other suitable signal transmission medium, and a transmitter for converting the received signal to a form for wireless transmission.

Communication is provided which includes receiving a transmitted radio signal at a powerline wherein the powerline functions as a receiving antenna for the wirelessly transmitted radio signal. The powerline is coupled to an input of a radio receiver using a coupler to communicate the radio signal to the radio receiver. For calibration purposes a second antenna not coupled to powerline may be used. A method for powerline communication across transformers, open circuit breakers, and other devices is also provided. In addition, a method of monitoring a device connected to a powerline is provided.

Methods, apparatuses, and systems directed to a wireless node location mechanism that uses a signal strength weighting metric to improve the accuracy of estimating the location of a wireless node based on signals detected among a plurality of radio transceivers. In certain implementations, the wireless node location mechanism further incorporates a differential signal strength metric to reduce the errors caused by variations in wireless node transmit power, errors in signal strength detection, and/or direction-dependent path loss. As opposed to using the absolute signal strength or power of an RF signal transmitted by a wireless node, implementations of the present invention compare the differences between signal strength values detected at various pairs of radio receivers to corresponding differences characterized in a model of the RF environment. One implementation of the invention searches for the locations in the model between each pair of radio receivers where their signal strength is different by an observed amount.

Apparatuses, systems and methods for transmitting and receiving modulated impulse radio signals. An impulse radio receiver includes a time base, a precision timing generator, a template generator, a delay, first and second correlators, a data detector and a time base adjustor. The time base produces a periodic timing signal that is used by the precision timing generator to produce a timing trigger signal. The template generator uses the timing trigger signal to produce a template signal. A delay receives the template signal and outputs a delayed template signal. When an impulse radio signal is received, the first correlator correlates the received impulse radio signal with the template signal to produce a first correlator output signal, and the second correlator correlates the received impulse radio signal with the delayed template signal to produce a second correlator output signal. The data detector produces a data signal based on at least the first correlator output signal. The time base adjustor produces a time base adjustment signal based on at least the second correlator output signal. The time base adjustment signal is used to synchronize the time base with the received impulse radio signal.

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 satellite digital audio radio receiver system and method. The inventive receiver includes a circuit for down-converting a first ensemble in a received combined signal in a first mode of operation and for down-converting a second ensemble from the received combined signal in a second mode of operation. The first ensemble includes a first signal received from a first transmitter, a second signal received from a second transmitter, and a third signal received from a third transmitter. The second ensemble includes a second signal from the first transmitter, a second signal from the second transmitter, and a second signal from the third transmitter. A controller is included to selectively switch the circuit from the first mode to the second mode. The first ensemble comprises first, second and third frequency slots and the second ensemble comprises fourth, fifth, and sixth frequency slots. In the illustrative embodiment, the first and second transmitters are mounted on first and second satellites and the third transmitter is a terrestrial repeater. Both ensembles are transmitted in accordance with the XM frequency plan. The first ensemble is down-converted using low side injection and the second ensemble down-converted using high side injection. The inventive circuit includes a synthesized frequency source. The circuit further includes a first intermediate frequency down-conversion stage with a first mixer for mixing the received combined signals with the output of synthesized frequency source. The circuit further includes first and second surface acoustic wave filters for separating the first and second signals received from the third signals. The inventive circuit further includes a second intermediate frequency down-conversion stage having second and third mixers for mixing the outputs of the first and second filters, respectively, with the output of a local oscillator.

An interactive radio system is disclosed. The overall architecture of the interactive radio system includes a broadcast system for broadcasting digital information across a radio signal to web radio receiver units. An interactive broadcast reception system includes a general purpose computer having a processor, display, and storage and internet connection, a broadcast receiver to communicate with the general purpose computer and to decode digital subcarrier data formatted as a broadcast markup language document, and application software that runs on the processor of the computer and communicates with the broadcast receiver to control the operation of the broadcast receiver and to respond to broadcast markup language commands in said broadcast markup language document by connecting to an internet address referenced in said digital subcarrier data.

Mobile device (3) and method for receiving and processing program-accompanying digital data, which are transmitted by a radio transmitter (1), for example a DAB transmitter, and of which at least certain comprise location parameters. The mobile device (3) includes a radio receiver (38), which can receive radio programs with program-accompanying digital data, and a position locating module (39) for establishing the current position, for example a GPS receiver. The mobile device (3) further comprises a filter module (37), by means of which, on the basis of the current position, determined by the said position locating module (39), location-specific information can be filtered from the received program-accompanying data, which contain, for example, order numbers, URL addresses or executable program data files. The received program-accompanying data can be filtered moreover by the said filter module (37) on the basis of a user profile (35) stored in the mobile device (3). Location-specific data can be shown on a display (31) of the mobile device (3), can be selected by the user by means of operating elements (32) of the mobile device (3), can be edited and can be further processed through the mobile device (3).

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 relates to a method and a system for monitoring and position determination of objects and/or living beings within an area, such as, e.g. a room in a building. The system comprises a plurality of electronic units, called identification tags, which are attached to the objects that have to be monitored. Each identification tag has its own identification code (ID code) and is equipped with an ultrasonic transmitter, radio transmitter and radio receiver. The ultrasonic signals are recieved by one or more master and slave units which calculate transit time differences of ultrasonic pulses. This information together with the identification tags' ID code, identification of the room in which it is located, and any additional information are transmitted to a central processing unit which calculates the identification tag's position and presents it to a user of the system.

In a signal receiving apparatus as, for example, that used in the monitoring in a stolen vehicle transceiver of the presence of sequential transmitted signals specifically requesting that transceiver to respond to enable tracking the vehicle, wherein the receiver is powered by a consumable energy source of predetermined budgeted lifetime and adapted to operate between quiescent energy-saving and energized energy-consuming states for performing such sequential signal monitoring, desired signal identifying and related functions, a method of and apparatus for insuring the availability of energy to be able to perform such functions within said predetermined budgeted life time, that comprises, allocating budget time intervals for periodically operating the receiver intermittently in energized state to enable the performing of such functions as monitoring for such signals; and, in the event of inordinate energy consumption during such operation, that, if continued, would render the operation out of overall allocated time budget, adaptively skipping time intervals with the receiver quiescent, sufficiently to get the operation back on overall time budget.

There is provided by this invention an improved rf power control device for plasma applications for optimization of the feedback control voltage in the presence of harmonic and non-harmonic spurious frequencies. In this system, an oscillator and mixer, similar to those normally used in radio receiver applications are placed at the sampled output of the solid state rf signal source used for plasma ignition. The sampled output is mixed to a low frequency and filtered to remove the spurious frequencies that is created in the non-linear plasma. In this way, the feedback power control essentially ignores the spurious frequencies. In this application, the oscillator and mixer do not interfere with other desirable system characteristics and effectively isolate the feedback control voltage from changes in plasma spurious content. This allows rf power to be delivered to the plasma with greater accuracy than would otherwise be possible with conventional power control device and methods.

A personal sound link module (60) is inserted into a tunnel (40) made through the soft tissue connecting the retro-auricular space (50) with the ear canal (30). The module contains an acoustic transducer (65), located at the distal part (68) of the module, close to or inside the ear canal, an antenna (64) that receives and also potentially sends signals to a remote source, signal processing circuitry (67), telemetry circuitry (69), a power source (66) that powers the module, and possibly a microphone (63). Signals transmitted from a remote source are received through the antenna and telemetry circuitry, processed, and presented to the acoustic transducer, where they are converted to sound waves broadcast into the user's ear canal. The remote source may be a radio station, radio receiver, CD player, DVD player, tape player, audio system, telephone, TV receiver or station, or other source of audio signals intended to be heard privately by the user.

A radio receiver supporting cancellation of thermal and phase noise in a down-converted RF signal. An inbound RF signal and blocking signal are provided directly to a passive mixer for down-conversion into a first baseband signal having data, thermal noise, and reciprocal mixing (RM) noise components. The inbound signals are also provided to a transconductance circuit, the output of which is provided to a second passive mixer for conversion into a current signal having data and blocking signal components, and a RM image. The blocking signal component and the RM image are mixed with a second LO signal, derived from the blocking signal, to produce a RM noise cancellation signal. The data component of the current signal is converted into a second baseband signal having data and thermal noise components. The first baseband signal, second baseband signal and RM noise cancellation signal are then combined through harmonic recombination.

An apparatus and method for golf swing analysis is described using a first microprocessor, a three-axis accelerometer capable of transmitting linear acceleration data to the first microprocessor, a three-axis gyroscope capable of transmitting angular velocity data to the first microprocessor, data processing, a radio transmitter for transmitting processed data, and a housing for holding the components, which attaches to a golf club. A three-axis magnetometer capable of transmitting directional orientation data to the first microprocessor is used to allow a user to choose a target line. Communication occurs between the apparatus and a portable device with a radio receiver, memory and a computer program that processes the data into graphical data and statistical data and displays the swing graphically after a user swings the golf club. The user will be able to analyze and try to improve his or her golf swing.