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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 8165539 | Apparatuses and a method for reducing peak power in telecommunications systems The present invention relates to an apparatus for reducing peak power in a transmitter for use in telecommunications systems. The invention also relates to a method for reducing peak power in a transmitter for use in telecommunications system and to a base station i... | 04/24/2012 |
| 7941108 | Method and system for automatically identifying wireless signal quality of a region A method for automatically identifying wireless signal quality of a region includes receiving signal quality information associated with wireless signals received by each of a plurality of mobile endpoints and receiving location information identifying locations of ... | 05/10/2011 |
| 7428424 | Apparatus and method for power control of downlink shared channel in mobile communication system An apparatus and method for controlling the transmission power of a DSCH in a mobile communication system is disclosed. In the DSCH transmission power controlling method, a UE generates information for controlling the transmission power of the DSCH based on a channe... | 09/23/2008 |
| 7424305 | Base station, mobile station, communication system, and communication method A base station communicates with plural mobile stations using a common channel common to the mobile stations, and a predetermined number of a plurality of shared channels assigned to the mobile stations. The base station includes a scheduler that acquires, for each ... | 09/09/2008 |
| 7423995 | Criteria for tearing down network links The present invention, which may be embodied in or carried out by various components of a data communications network, provides an improved criterion for tearing down network links. The invention allows network components to take into account the quality, status and... | 09/09/2008 |
| 7421254 | High linearity, high efficiency power amplifier with DSP assisted linearity optimization A communications transceiver includes a baseband processor, a receiver section, and a transmitter section that includes a power amplifier. The receiver and transmitter sections communicatively couple to the baseband processor. In a calibration operation, the baseban... | 09/02/2008 |
| 7395039 | Transmitter In a transmitter of the present invention, a modulated signal is separated into an amplitude component and a phase component which are inputted to a radio-frequency modulated signal input terminal and a supply voltage terminal of a radio-frequency power amplifier. A... | 07/01/2008 |
| 7386284 | Controlling the gain of a remote active antenna A receiver includes a tuner and a circuit. The tuner receives an indication of a radio frequency signal from an antenna feedline in response to the radio frequency signal being provided to the antenna feedline by an amplifier. The circuit transmits a control signal ... | 06/10/2008 |
| 7379747 | Method for controlling output power of handheld terminal in mobile communication system A method for controlling an output power of a plurality of handheld terminals in a mobile communication system, includes: generating a TPC coding value according to transmit output characteristics of each handheld terminal; setting an uplink Eb/No reference value wi... | 05/27/2008 |
| 7373168 | Power controlled fading communication channel system A power controller in a communication system adjusts the transmitted power level using adaptive prediction of channel fading for maintaining the power level for improved communications by using an adaptive nonlinear predictor that explicitly takes into account the p... | 05/13/2008 |
| 7373117 | Power control in telecommunications networks A radio frequency transmitter is power controlled using a controlling system including an integrating controller, together with an inner and an outer control loop. A tracking signal supplied by the inner loop to the integrating controller of the outer loop is used t... | 05/13/2008 |
| 7369812 | Method and circuit arrangement for determining the signal strength in receivers with complex signal processing In order to provide a method of determining the signal strength in a receiver or transmitter with complex signal processing using the in-phase channel (I channel) and the quadrature channel (Q channel), by means of which it is also possible to reliably determine the... | 05/06/2008 |
| 7349707 | Wireless communication apparatus with relative distance estimation means A wireless communications system including a mobile terminal and a mobile receiver. The receiver includes: a reception level acquisition section for acquiring reception levels of wireless signals, wherein the reception level acquisition section measures the receptio... | 03/25/2008 |
| 7346477 | Testing a station's response to a reduction in wireless signal strength Techniques for testing a station, such as a wireless-enabled device, are described. A first method relates to evaluating a station configured to communicate with at least one access point. Another device is controlled to communicate wirelessly with the station by tr... | 03/18/2008 |
| 7333813 | Methods and devices for assigning mobile devices to base stations in the presence of interference Mobile devices are assigned to their correct base stations after taking into consideration interference from all other mobile devices. The resulting assignments are more efficient than previous assignments. In addition, transmit power levels are assigned after each ... | 02/19/2008 |
| 7333564 | High frequency power amplifier circuit The present invention provides a high frequency power amplifier circuit capable of obtaining sufficient detection output even in a range where a request output power level is low and performing a desired output power control by a control loop with the detection outp... | 02/19/2008 |
| 7317419 | Self-calibrated path loss position estimation and zone of impact determination A device and method are provided for estimating a position of a target device (e.g., a device emitting radio frequency energy) based on data pertaining to strength of an emission received from the target device. At a mobile device, emissions are received from the ta... | 01/08/2008 |
| 7313397 | Cellular network acquisition method and apparatus A method of network acquisition for a cellular radio communications device arranged for operation in accordance with a plurality of radio technologies and comprising searching to identify a suitable cell on one radio technology. Subsequent to identifying a suitable ... | 12/25/2007 |
| 7308279 | Dynamic power level control on transmitted messages in a wireless LAN Briefly, in one embodiment, a method for enhancing aggregate data throughput for a number of wireless devices. First, a signal having a first level of effective isotropic radiated power is transmitted by a first wireless electronic device. In the event that a respon... | 12/11/2007 |
| 7301402 | Soft saturation detection for power amplifiers A soft saturation detection circuit for a radio frequency (“RF”) power amplifier is configured to detect the onset of soft saturation in an unambiguous and accurate manner. The circuit compares the time derivative of a voltage signal indicative of the RF output ... | 11/27/2007 |
| 7299015 | Transmission output control circuit, and wireless device using the same According to a transmitting output control circuit, one end of a coupling capacitor and one end of main line of a directional coupler are coupled with an output terminal of a power amplifier. A switch for coupling the other end of the coupling capacitor and one end ... | 11/20/2007 |
| 7295817 | Wireless data communication unit A wireless data communication unit (700) shares a data communication resource with a plurality of other data communication units. The wireless data communication unit (700) receives channel status information from a wireless serving communication unit ... | 11/13/2007 |
| 7288991 | Power control circuit for accurate control of power amplifier output power According to an exemplary embodiment, an amplification module includes a power control circuit. The amplification module further includes a power amplifier coupled to the power control circuit and configured to draw a supply current and receive a supply voltage from... | 10/30/2007 |
| 7269395 | Envelope detection circuit for low power communication systems An envelope detection circuit includes a signal rectifier, first and second capacitors, and first, second and third transistors. The signal rectifier includes an input port coupled to receive a modulated input signal, and an output port. The first capacitor has a fi... | 09/11/2007 |
| 7260362 | Method and apparatus for establishing ad hoc groups in a wireless communication network During formation of an ad hoc group, the transmit power level of a user device within a wireless communication network is reduced. Potential group members are thus identified within an immediate vicinity of the user device. ... | 08/21/2007 |
| 7257411 | Selective fusion location estimation (SELFLOC) for wireless access technologies In an RF environment serviced by 802.11, Bluetooth(™), or other network transmitters, or combinations, location-estimation methods and systems can advantageously use redundancy to refine an estimated location of an RF receiver. In one embodiment, a method for find... | 08/14/2007 |
| 7257373 | Method and apparatus for determining adjacency of wireless device to POS terminal One or more stationary wireless readers are used to determine the relative strength of calibration signals sent from fixed locations adjacent to POS terminals. Then, the signal strength of signals being transmitted by wireless devices within range of the one or more... | 08/14/2007 |
| 7254373 | Antenna diversity based on packet errors A wireless transceiver including multiple antennas, an antenna switch, and a media access controller that controls the antenna switch for determining when to switch to another antenna based on packet error rate (PER). Instead of switching the antenna on a packet-by-... | 08/07/2007 |
| 7231220 | Location based method and system for wireless mobile unit communication A method and system for wireless mobile unit communication within a wireless network having geographic areas for preferred communication usage is provided. An estimated geographic location of a mobile unit is determined. The mobile unit is provided with relative pos... | 06/12/2007 |
| 7228114 | Wide dynamic range power detection scheme A power detection circuit is described that provides for a wide dynamic range power detection. The circuit incorporates a coupler to sample a transmitted or received power. Such sampled power is then directed to a detector diode configured to generate a voltage from... | 06/05/2007 |
| 7224191 | Differential signal detector methods and apparatus Circuitry and methods allow signal detection based entirely on differential voltage pairs. An incoming differential data signal is processed by separate full-wave rectifiers to extract high and low peak voltage envelopes. The rectifiers utilize negative feedback to ... | 05/29/2007 |
| 7209754 | Method and apparatus for determining the location of a node in a wireless title system A method and apparatus for determining the location of a node within a communication system is provided herein. During operation, reference nodes (105) having known locations are utilized to locate “blind” nodes (104) whose location is to be determ... | 04/24/2007 |
| 7203511 | Control of transmit power of a radio frequency integrated circuit A method for controlling transmit power of a radio frequency integrated circuit begins by sampling a continuous transmit signal strength indication (TSSI) for a predetermined number of sampling cycles to produce a plurality of TSSI samples. The process then proceeds... | 04/10/2007 |
| 7200402 | Method for handing off streaming media sessions between wireless base stations in a mobile streaming media system A method for performing a soft-handoff in a mobile streaming media system, and a method for performing a hard-handoff in a mobile streaming media system are is disclosed. In the soft-handoff embodiment, the present invention detects that a channel quality between a ... | 04/03/2007 |
| 7197318 | Method and network element for controlling handover The present invention relates to a method and apparatus for controlling a connection transfer in a cellular network having at least two systems, such as a GSM system and a WCDMA system. Based on a load determination, a service-based inter-system or inter-frequency h... | 03/27/2007 |
| 7194280 | Mobile station assisted forward link open loop power and rate control in a CDMA system Establishment of a forward link traffic channel between one or more candidate base stations and a mobile station considers forward link quality such that the initial transmit power is set to a level that achieves a desired received signal quality at the mobile stati... | 03/20/2007 |
| 7187914 | Rectifiers and rectifying methods for use in telecommunications devices A signal strength indicator circuit including a set of rectifiers. The set of rectifiers include an asymmetric switching pair of rectifiers that may be configured to provide an output signal that is inversely proportional to an input signal obtained from a device in... | 03/06/2007 |
| 7187910 | Directional coupler and dual-band transmitter using the same Disclosed herein are a directional coupler which is implemented with strip lines for signal coupling and inter-digital capacitors for phase compensation, and a dual-band transmitter using the same. The directional coupler includes a first transmission device, a firs... | 03/06/2007 |
| 7187909 | Current mode transmitter A current-domain transmitter is configured to receive an input signal and provide a transmitted signal. The transmitter has a plurality of elements, operatively arranged between the input signal and the transmitted signal and configured to represent the input signal... | 03/06/2007 |
| 7181178 | Automatic gain control A method of controlling the gain of a receiver of a radio device suitable for use in a spread spectrum communication system comprising at least two base stations and a radio device, the method comprising estimating the extent to which received signal strength will d... | 02/20/2007 |
