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| Number | Title | Issue Date |
| 7606537 | System and method for transmitting data via wave reflection A system and method of encoding and transmitting data includes a data receiver/carrier transmitter which transmits a sinusoidal carrier signal to a data source/carrier receiver. The data source encodes at least one transmission channel during a corresponding period.... | 10/20/2009 |
| 7551903 | Reflecting modulator circuit comprising a negative impedance amplifier A modulator circuit comprises a negative impedance amplifier which is operable such that a signal applied to the amplifier is reflected and amplified. Switching means are provided for switching the impedance of the amplifier between two reflecting states such that t... | 06/23/2009 |
| 7436308 | Adjusting RFID waveform shape in view of signal from another reader Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy encountered in conjunction with using a selected channel is detected. The RF energy can be a signal from another RFID reader. The detected signal... | 10/14/2008 |
| 7383026 | Wideband retroreflector A novel single wideband retroreflector is disclosed that eliminates the need for a local oscillator and a local transmitter. The wideband retroreflector of the present invention comprises an antenna, a circulator, and a mixer. An externally produced continuous wave ... | 06/03/2008 |
| 7379710 | Radio-wave propagation characteristic forecasting system and its method, and program An object of the invention is to obtain a high-speed and high-accuracy radio-wave propagation characteristic forecasting system in combination with the launching method by correctly estimating a diffraction phenomenon when a ray passes the vicinity of an edge of a s... | 05/27/2008 |
| 7366472 | Technology for creating a RF radiation-free environment The invention relates to a method of rendering telecommunication devices ineffective, by creating a substantially radio frequency radiation-free environment by providing an interference generating pattern (IGP) adjacent to the environment in a position between the e... | 04/29/2008 |
| 7353006 | Closed loop power control of non-constant envelope waveforms using sample/hold A radio frequency output power control system for use in communication systems is disclosed. The power control system is used for a modulation scheme having a non-constant amplitude envelope and comprises a power amplifier having a power amplifier input for receivin... | 04/01/2008 |
| 7324792 | Apparatus and method for transmitting signal in mobile communication system A method for transmitting signal in a mobile communication system allocates symbols which will be transmitted to transmitting antennas appropriately as considering detection efficiencies of symbols on a higher order modulation constellation and correlation between a... | 01/29/2008 |
| 7317876 | Medium access control for retro-reflectors A method, a device and a system for communications to and from a retro-reflector device (302) is provided. The retro-reflector device (302) receives a first frame (400) encoded in an input beam (106). The retro-reflector device (302 | 01/08/2008 |
| 7308207 | Method for identifying an interrogated object using a dynamic optical tag identification system An interrogator identifies an interrogated object using a light transceiver and a dynamic optical tag associated with the interrogated object. The dynamic optical tag receives an output light beam from the light transceiver and controllably reflects the light beam b... | 12/11/2007 |
| 7256707 | RF transmission line and drill/pipe string switching technology for down-hole telemetry A modulated reflectance well telemetry apparatus having an electrically conductive pipe extending from above a surface to a point below the surface inside a casing. An electrical conductor is located at a position a distance from the electrically conductive pipe and... | 08/14/2007 |
| 7239228 | Apparatus for mediating communication between controller and transponders of many moving objects and method for controlling the same Disclosed are a communication mediation apparatus and a method for controlling the same for performing communication mediation while reducing a communication miss rate caused by collision of data. A performance of a moving object recognition system unavoidably varie... | 07/03/2007 |
| 7236742 | System and method for wireless data transfer for a mobile unit A mobile communication device is provided for wirelessly transferring information to and from a base unit. The device comprises an RFID module to receive a wake-up communication from the base unit and to send connection parameters back to the base unit. A wireless c... | 06/26/2007 |
| 7228110 | Low cost high frequency device having compact mounting area, high frequency amplification method, wireless communication device and mobile telephone including low cost and high frequency circuit having compact mounting area A high frequency device includes a transmission/reception amplifier 13 that amplifies and outputs an input signal, and a transmission/reception switch 2 that gang switches internally so that during transmission an input of the transmission/reception am... | 06/05/2007 |
| 7224712 | Interrogator and tag of wireless communication system In a wireless communication system including at least one Interrogator and a plurality of Tags, the Interrogator transmits a main carrier signal, and each Tag transmits a reflected signal to the Interrogator in response to reception of the main carrier signal. The T... | 05/29/2007 |
| 7224953 | Receiving device and television receiver A receiving device in which the shielding performance is improved to solve a pulling problem in a receiving device of a direct conversion system is provided. The receiving device includes: a substrate on which an amplifier 30 that amplifies high freque... | 05/29/2007 |
| 7215964 | Asymmetric radio access network, and associated method, for communicating data at high data rates Apparatus, and an associated method, for a radio communication system. Asymmetrically positioned downlink data transmitting stations and uplink data receiving stations are positioned defining downlink service areas and uplink service areas. A mobile terminal, when p... | 05/08/2007 |
| 7204410 | Information processing apparatus and method, information processing system, and medium A structure of a system using an IC card is simplified. A controller and active antennas are connected to each other through a bus. The controller transmits a command outputted from a host computer and including an ID for discriminating the active antennas to all th... | 04/17/2007 |
| 7206544 | Self-service terminal A self-service terminal (10 or 200 or 300) comprises a plurality of intercommunicating modules (114 to 126, or 214 to 226, or 314 to 326). Each module includes a transceiver for wireless communication wi... | 04/17/2007 |
| 7196655 | System and method for highly directional electronic identification and communication and combat identification system employing the same An antenna for directional electronic communication, a directional communication system, a method of conducting directional communication, a combat identification system and a method of identifying friendly forces. In one embodiment, the antenna includes: (1) a cond... | 03/27/2007 |
| 7190907 | Dynamic optical tag An optical tag, having a photo-detector, a controller, a piezoelectric translator, a battery and a retro-reflective tape. The photo-detector is responsive to an optical energy at a predetermined wavelength, and the controller is connected to the output of the photo-... | 03/13/2007 |
| 7167688 | RF transceiver module formed in multi-layered ceramic An RF transceiver module for wireless communication devices includes a multi-layered substrate, an RF transceiver IC mounted on the multi-layered substrate for receiving and transmitting voice or data signals, at least one band selection filter mounted on the multi-... | 01/23/2007 |
| 7162284 | Mobile phone, analysis device included therein, and analysis method A mobile phone has an upper antenna at the top of a casing constituting a body and a lower antenna at the bottom of the casing. The mobile phone includes an influence-on-antenna evaluation unit for evaluating the influence of the ambient environment on each of the a... | 01/09/2007 |
| 7103325 | Adaptive modulation and coding The present invention selects a space-time encoding mode to use when transmitting with spatial diversity based on the receive diversity associated with a receiver device and the quality of the transmission channels based on information fed back from the receiver dev... | 09/05/2006 |
| 7103329 | Adaptive feedback channel for radio frequency power amplifiers A radio frequency (RF) amplifier system includes an RF power amplifier having an input and an output, and a typical gain of 1000 or more between the input and the output. An adaptive feedback channel is coupled between the input and the output of the RF power amplif... | 09/05/2006 |
| 7095311 | Identification coding schemes for modulated reflectance systems An identifying coding apparatus employing modulated reflectance technology involving a base station emitting a RF signal, with a tag, located remotely from the base station, and containing at least one antenna and predetermined other passive circuit components, rece... | 08/22/2006 |
| 7054563 | Multi-channel optical communication system that controls optical reflection for each channel and optical transmitting and receiving apparatus therefor A multi-channel optical communication system includes an optical transmitting apparatus and an optical receiving apparatus. The optical transmitting apparatus has a retroreflector and a modulator for modulating light reflected by the retroreflector according to a tr... | 05/30/2006 |
| 7046121 | Detection of an electric signature of an electromagnetic transponder The invention concerns a terminal generating a high-frequency electromagnetic field by means of an oscillating circuit, adapted to co-operate with at least a transponder when the latter enters said field, comprising means (37) for regulating the phase of the ... | 05/16/2006 |
| 7019645 | Method for managing receiver means of a transponder adapted to communicate at relatively long distance The method of managing receiver means of a transponder activates the transponder periodically during listening periods (12A, 12B; 14A, 14B, 14C) to detect a carrier and then to receive a message. If the carrier is an unwanted carri... | 03/28/2006 |
| 7016657 | Apparatus, and associated method, for communication system utilizing space-generated multilevel coding Apparatus, and an associated method, for forming a space-generated multilevel coding scheme for a radio communication system. Two or more modulators are positioned at a sending station. The modulators modulate, pursuant to separate modulation schemes, data that is t... | 03/21/2006 |
| 6996420 | Radio communication system, mobile terminal unit thereof, and azimuth determining method Disclosed are a mobile station unit which can obtain azimuth information with a simple construction and a radio communication system including the mobile terminal unit. According to the present invention, in a terminal station, an arrival direction obtaining section... | 02/07/2006 |
| 6982627 | Low power regulated amplifier for a transponder A transponder (1) comprising an antenna (4), a demodulator (5) and a signal processing circuit (6) which converts a modulated signal received via the antenna (4) into a signal suitable for processing in the demodulator (5). ... | 01/03/2006 |
| 6975264 | Signal separating system A signal separating system 1 comprises a frequency conversion element 3, a dynamic filter component 4 with associated coherent stop slot and non-coherent passband, optionally a signal wave enhancer 7 with bypass, and a frequency reconvers... | 12/13/2005 |
| 6966490 | Information processing apparatus and method, information processing system and medium A structure of a system using an IC card is simplified. A controller and active antennas are connected to each other through a bus. The controller transmits a command outputted from a host computer and including an ID for discriminating the active antennas to all th... | 11/22/2005 |
| 6961547 | Wireless transmitter incorporating a synchronous oscillator in a translation loop A translation loop signal upconverter is disclosed. Embodiments of the invention minimize nth order harmonics and spurious tones in the radio frequency output spectrum of a portable transceiver. In one embodiment, the invention is a signal upconverter, co... | 11/01/2005 |
| 6950633 | Rotary non-contact connector and non-rotary non-contact connector A rotary non-contact connector and a non-rotary non-contact connector enable data transmission in a non-contact mode by radio transmitters-receivers by combining rotary transformers or stationary transformers and radio transmitters-receivers, and providing power sys... | 09/27/2005 |
| 6941117 | Portable radio having pivotable antenna A folding, portable radio device is provided, which optimizes the gain characteristic of an antenna optionally. This device comprises (a) a first package; (b) a second package connected pivotably to the first package around a specific axis with a joint; the second p... | 09/06/2005 |
| 6919845 | Apparatus for measuring specific absorption rate based on near magnetic field for use in radio apparatus In an apparatus for measuring a specific absorption rate (SAR) for use in a radio apparatus, a first near magnetic field of a radio wave radiated from a reference radio apparatus is measured in free space, and an SAR of the radio wave radiated from the reference rad... | 07/19/2005 |
| 6801791 | Cellular communications system and related methods A cellular communications system includes a base station and at least one mobile station communicating therewith. The base station may include a plurality of antennas and a modulator for providing a transmit signal for each antenna. The modulator may estimate a weig... | 10/05/2004 |
| 6799027 | Amplifier circuit An amplifier circuit for amplifying an input signal to generate an amplifier output signal incorporates a cascaded series of reflection amplifiers arranged along a signal path and operative to amplify signals propagating in a forward direction along the signal path.... | 09/28/2004 |