397 results about "Wireless repeater" patented technology

Apparatus for tracking an object includes a plurality of field generators, which generate electromagnetic fields at different, respective frequencies in a vicinity of the object, and a radio frequency (RF) driver, which radiates a RF driving field toward the object. A wireless transponder is fixed to the object. The transponder includes at least one sensor coil, in which a signal current flows responsive to the electromagnetic fields, and a power coil, which receives the RF driving field and conveys electrical energy from the driving field to power the transponder. The power coil also transmits an output signal responsive to the signal current to a signal receiver, which processes the signal to determine coordinates of the object.

A low cost, robust, repeater for a wireless ambient sensor system that provides an extended period of operability without maintenance is described. The repeater includes a controller and first and second transceivers. The controller is configured to control operation of said first transceiver and said second transceiver. The wireless repeater includes a repeater identification. The controller is configured to manage a sensor unit identification table that contains a list of sensor unit identification codes, where entries for the sensor unit identification table are received by the second transceiver from the base unit and identified by the repeater identification. The controller controls the first transceiver and the second transceiver to forward data from sensor units listed in said sensor unit identification table and to ignore data from sensor units not listed in said sensor unit identification table. The controller also controls the first transceiver and the second transceiver to forward data from the base unit that is addressed to sensor units listed in said sensor unit identification table and to ignore data from the base unit that is addressed to sensor units not listed in said sensor unit identification table. The controller places the first transceiver and the second transceiver in a low-power mode when no transmissions are expected from the base unit or from the sensor units listed in the sensor identification table.

A network for wireless transmission of data includes a source access point, a destination device and a plurality of wireless repeaters that provide a transmission link between the source access point and the destination device. The plurality of access points each includes a single transceiver with separate transmitter and receiver sections operable to simultaneously transmit and receive data on different frequency channels. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

A sensor system that provides an adjustable threshold level for the sensed quantity is described. The adjustable threshold allows the sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability for hazardous conditions. The adjustable threshold sensor can operate for extended periods without maintenance or recalibration. In one embodiment, the sensor is self-calibrating and runs through a calibration sequence at startup or at periodic intervals. In one embodiment, the adjustable threshold sensor is used in an intelligent sensor system that includes one or more intelligent sensor units and a base unit that can communicate with the sensor units. When one or more of the sensor units detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor unit communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet (and/or local area network), etc. In one embodiment, one or more wireless repeaters are used between the sensor units and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

A method is provided for tracking an object, including positioning a radio frequency (RF) driver to radiate an RF driving field toward the object, and fixing to the object a wireless transponder that includes a power coil and at least one sensor coil. The method also includes receiving the RF driving field using the power coil and storing electrical energy derived therefrom. A plurality of field generators are driven to generate electromagnetic fields at respective frequencies in a vicinity of the object that induce a voltage drop across the at least one sensor coil. A digital output signal is generated at the wireless transponder indicative of the voltage drop across the sensor coil, and the generation of the digital output signal is powered using the stored electrical energy. The digital output signal is transmitted from the wireless transponder using the power coil, and the transmission of the digital output signal is powered using the stored electrical energy. The digital output signal is received and processed to determine coordinates of the object.

Provided are to a real-time RFID location determination system for accurately determining a location of a mobile object using radio frequency identification (RFID) in real-time, a method thereof, and a method for installing a wireless repeater such as a RFID reader or a RFID reader and an access point (AP) using the same. The location determination system includes: a wireless repeater for identifying a radio frequency identification (RFID) tag by communicating with the RFID tag attached or installed at a target object to determine a location thereof, wherein the wireless repeater is installed a urban facility and a location of the target object is determined based on a coordinate of a corresponding urban facility as a reference point.

A moisture sensor system is described. In one embodiment, the system provides an adjustable threshold level for the sensed moisture level. The adjustable threshold allows the moisture sensor to adjust to ambient conditions, aging of components, and other operational variations while still providing a relatively sensitive detection capability. In one embodiment, the adjustable threshold moisture sensor is used in an intelligent sensor system that includes one or more intelligent sensor units and a base unit that can communicate with the moisture sensor units. When one or more of the moisture sensor units detects a excess moisture the moisture sensor unit communicates with the base unit and provides data regarding the moisture condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet (and/or local area network), etc. In one embodiment, one or more wireless repeaters are used between the moisture sensor units and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

A wireless signal repeater having an integrated display that concurrently displays a receive signal level, a transmit signal level, and a textual indication of signal quality, reflecting how well the repeater is currently operating to repeat wireless signals. By reference to the integrated display, a user can readily determine whether the repeater is well positioned to function as desired. And if the display indicates that the repeater is not functioning optimally, the user can then conveniently move the repeater around until the repeater reflects an acceptable level of operation.

Authentication systems and methods are provided. In accordance with one method, a user identification is determined based upon a signal modulated by a wireless transponder circuit in an identification token. The signal strength of signals modulated by the wireless transponder is monitored over a period of time and a pattern of movement of the identification token is determined. An authentication signal is generated when the sensed pattern of movement of corresponds to a previously stored set of token authentication movements associated with the determined user identification.

A wireless repeater with features that improve the server-donor antenna isolation including multi-purpose server and donor mounting plates that each carry an antenna feed circuit board and associated antenna elements mounted in a back-to-back arrangement with the duplex repeater electronics board sandwiched between the server and donor mounting plates. To improve the server-donor antenna isolation, one or both mounting plates may include corner, side tabs, which may be asymmetric, and raised walls around one or both mounting plates. In addition, the radomes covering the donor antenna and/or the server antennas may carry one or more parasitic conductors, such as a two parasitic strips arranged in parallel lines or for parasitic strips arranged in a square configuration.

A low cost, robust, wireless sensor system that provides an extended period of operability without maintenance is described. The system includes one or more intelligent sensor units and a base unit that can communicate with a large number of sensors. When one or more of the sensors detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet, etc. In one embodiment, one or more wireless repeaters are used between the sensors and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

A wireless repeater and method for managing air interface communications is provided. A repeater may include a donor antenna, a coverage antenna, a mobile station modem, a processor, and data storage. The donor antenna will receive a plurality of air interface beams on the forward link from a radio access network. The coverage antenna will pass each forward link beam received to a mobile station being served by the repeater. Further, the donor antenna will pass each forward link air interface beam to the MSM, where the MSM will apply a rake receiver to identify a signal characteristic of the forward link of each beam received, and the processor will record in the data storage the signal characteristic corresponding to each beam. Given this data, the repeater will select an air interface beam with the most preferable signal characteristic, and will keep only this beam active for reverse link communications.

A method and system for improved backhaul efficiency dynamically assigns packet based backhaul channels in a cellular communications system which includes at least one wireless repeater and a base station. The method and system can perform packet based backhaul communications regardless of the translating repeater to mobile communications format used. The method and system can also use a single backhaul channel to transmit packets between multiple repeaters and the base station.

A wireless signal repeater for portable wireless communication devices includes an adapter for connecting a portable wireless communication device. When a portable wireless communication device is connected to the adapter, the portable device's own omni-directional antenna is disabled, and the portable device instead uses the repeater's directional antenna. Specifically, the adapter carries forward link signals received by the repeater's directional antenna to the portable wireless communication device and carries reverse link signals from the portable wireless communication device for transmission by the repeater's directional antenna.

A repeater for re-transmitting an incoming RF signal comprising: a first antenna array for receiving the incoming RF signal; a second antenna array for transmitting an outgoing RF signal; and a transceiver for down-converting the incoming RF signal to a down-converted signal, processing the down-converted signal, and up-converting the processed signal to produce the outgoing RF signal. The first antenna array is cross-polarized with respect to the second antenna array. The repeater also comprises an echo processor for attenuating in the down-converted signal an echo signal associated with the outgoing RF signal. The echo processor delays transmission of the outgoing RF signal in order to minimize the echo signal.

A wireless repeater comprises dual cancellation loops. The wireless repeater includes an active cancellation loop and a passive cancellation loops. The active cancellation loops reduces an environmentally induced signal component from a receive signal entering the repeater's amplifier. The passive cancellation loop reduces leaked signal component from the received signal.

An over the air repeater for enhancing wireless communication is provided. The repeater employs a system and method by which strong signals can be prevented from exceeding the repeater's uplink output limits while still providing full operational gain to any concurrently amplified weak signals, while adapting to time slot variations and optionally to frequency hopping variations. Power measurements are performed on each channel with resultant gain changes being performed on delayed versions of those same signals. Digital delay buffers are used to provide adequate processing time to make an accurate determination of the uplink signal levels of each RF carrier. The repeater alternatively monitors the downlink path from the donor base station to determine the frequencies to be processed on the uplink communication.

A wireless repeater for receiving, amplifying and transmitting one or more wireless signals. The repeater comprises a signal processing device for determining one or more attributes of a wireless signal received from a mobile device and a memory for storing a reference list that includes one or more preferred frequency bandwidths to be repeated. The repeater also comprises a controller coupled with the signal processing device for comparing the one or more attributes of the wireless signal with the reference list, wherein the controller selects a first active set of one or more frequency bandwidths from the preferred frequency bandwidths based on the comparison. The repeater still further comprises a first reception filter coupled with the controller, where the first reception filter, responsive to control signal(s) from the controller, filters out signals, communicated to the first reception filter, having frequencies outside the first active set of frequency bandwidths.

A wireless repeater includes an internal feedback path for adaptively cancelling an echo between an output antenna and an input antenna. The internal feedback path employs an adaptive algorithm implementing a list having a plurality of list elements. Each list element has one or more echo cancellation parameters and one or more repeater settings. The list may be pruned by employing a minimum distance between elements within the list. A method for stabilizing a wireless repeater includes obtaining an autocorrelation of a signal in a signal path of the repeater, detecting an echo in the signal path based on the autocorrelation, providing a list of elements indicating past successful echo cancellation coefficients and associated repeater settings, and adaptively adjusting an error of the echo cancellation coefficients to cancel the echo in the signal path.