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| Number | Title | Issue Date |
| 8023551 | Hybrid orthogonal frequency division multiple access WTRU and method A hybrid orthogonal frequency division multiple access (OFDMA) wireless transmit/receive unit (WTRU) and method. A WTRU includes a transmitter and a receiver. The receiver processes received data to recover data mapped to the subcarriers using OFDMA. The receiver re... | 09/20/2011 |
| 7787516 | Wireless communication system for reducing ranging time A wireless communication system and a method for reducing a ranging time. The communication system includes a main synchronization block group which processes the transceived signal and determines whether the transceived signal is a signal desired by a transmitting ... | 08/31/2010 |
| 7715460 | Hybrid orthogonal frequency division multiple access system and method A hybrid orthogonal frequency division multiple access (OFDMA) system including a transmitter and a receiver is disclosed. The transmitter includes a first spread OFDMA subassembly, a first non-spread OFDMA subassembly and a first common subassembly. The first sprea... | 05/11/2010 |
| 7660338 | Hybrid spread spectrum radio system Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein... | 02/09/2010 |
| 7656931 | Hybrid spread spectrum radio system Systems and methods are described for hybrid spread spectrum radio systems. A method includes modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control an amplification circuit that provides a gain to the signal. Another method... | 02/02/2010 |
| 7421004 | Broadband, ultra wideband and ultra narrowband reconfigurable interoperable systems Broadband, ultra wideband and ultra narrowband (UWN) reconfigurable, interoperable communication and broadcasting system architectures, combinations and hybrids of ultra wideband (UWB), ultra narrowband (UNB) and efficient broadband wireless, baseband, intermediate ... | 09/02/2008 |
| 7411994 | Methods and apparatus for adapting a hop sequence when establishing a communication connection Methods and apparatus are provided for establishing a connection between a scanner device and a pager device over a sequence of hop channels. The scanner device is repetitively activated and a hop channel is selected from the sequence of hop channels as a function o... | 08/12/2008 |
| 7408974 | Composite code-division/time-division multiplex system Increased data communication capacity in a sector of a CDMA wireless system using a combination of code division multiplexing and time division multiplexing. Adjacent subsectors may transmit carrier signals having the same frequency and using the same Walsh codes ma... | 08/05/2008 |
| 7366262 | Frequency estimation method of MB-OFDM UWB system using time frequency hopping strategy A frequency estimation method of multiband (MB)-orthogonal frequency division multiplexing (OFDM) ultra wide band (UWB) system using an Alt-PHY time frequency (TF) hopping strategy based on IEEE 802. 15. 3a. includes the steps of: a) selecting a predetermined number... | 04/29/2008 |
| 7362840 | Circuit and method for adjusting timing alignment using programmable codes A method is provided for adjusting timing alignment in which a receiver generates a plurality of imbalanced correction codes (1310), and square waves both having the same frequency. The receiver mixes the imbalanced correction codes with the square waves to c... | 04/22/2008 |
| 7359448 | Remote transmitter system and method A remote transmitter system for vehicle applications includes a remote transmitter for carrying by a user and a receiver for mounting on a vehicle and receiving an amplitude modulated signal. The transmitter is operative to transmit the amplitude modulated signal at... | 04/15/2008 |
| 7349457 | Broadband frequency agile signal characterization A signal analyzer to characterize the RF signal transmitted by a frequency hopping radio transmitter. The transmitted signal is analyzed while hopping across a broad frequency band without knowledge of the hop frequencies, timing or signal bandwidth. A wide range of... | 03/25/2008 |
| 7334417 | Air conditioner and power line communication system An air conditioner and a power line communication system high in reliability and free of malfunction facilitates the installation work such as the wiring. The air conditioner for conducting communication through a power line includes a bridge unit connected to at le... | 02/26/2008 |
| 7337078 | System and method for remote asset monitoring A system and method for remotely monitoring conditions at a location and for controlling devices at the location. The inventive system includes: a data link in communication with an electronically readable instrument, the data link having a transceiver configured fo... | 02/26/2008 |
| 7317752 | Method and system for locating a GPS correlated peak signal A global positioning system (GPS) receiver is provided, comprising a converter for converting received GPS signals to in-phase (I) and quadrature-phase (Q) digital signals; a correlator for generating expected codes and correlating the I and Q digital signals with t... | 01/08/2008 |
| 7315569 | Method and system for locating a GPS correlated peak signal A global positioning system (GPS) receiver is provided, comprising a converter for converting received GPS signals to in-phase (I) and quadrature-phase (Q) digital signals; a correlator for generating expected codes and correlating the I and Q digital signals with t... | 01/01/2008 |
| 7313153 | Wireless communication system, wireless communication control apparatus, wireless communication control method, wireless communication apparatus, wireless communication method, and storage medium A wireless communication system allocates a channel in each frame period in which the amount of channel space allocated to each guaranteed time slot remains unchanged when transmission using an allocated channel is performed in a personal area network. For transmiss... | 12/25/2007 |
| 7286607 | Energy-control method and apparatus for digital diversity signaling A method of communicating digital signal information through diversity signaling with a constrained amount of transmission energy-per-bit available Etot. The method includes steps of: measuring channel noise Nj and channel transmission loss g | 10/23/2007 |
| 7260056 | Channel estimation in a wireless communication system A plurality of communication bursts are transmitted substantially simultaneously in a time slot of a time division duplex/code division multiple access communication system. The communication system has a maximum number of K midamble shifts. Each burst has an assign... | 08/21/2007 |
| 7245649 | Methods and apparatus for adapting a hop sequence when establishing a communication connection Methods and apparatus are provided for establishing a connection between a scanner device and a pager device over a sequence of hop channels. The scanner device is repetitively activated and a hop channel is selected from the sequence of hop channels as a function o... | 07/17/2007 |
| 7243154 | Dynamically adaptable communications processor architecture and associated methods A dynamically adaptable communications processor includes a memory element, which includes executable content, and a control element, coupled with the memory element, that selectively implements the executable content to modify the dynamically adaptable communicatio... | 07/10/2007 |
| 7231190 | Method and apparatus for terminating reception in a wireless communication system A receiver front end (302) receives a known Stop Waveform (114) comprising a predetermined symbol pattern on a voice channel, the Stop Waveform sent at the end of a transmission. A processor (304) coupled to the receiver front end terminates ( | 06/12/2007 |
| 7215698 | Position fixing system In a first aspect the present invention provides a method of producing an ultra wide band signal in which a carrier signal is modulated by a spreading waveform which is a periodic deterministic wideband signal and the frequency of the carrier signal is changed by a ... | 05/08/2007 |
| 7209495 | Urgent messages and power-up in frequency hopping system for intemittent transmission A wireless telemetry system includes many radio transmitters using frequency-hopping carriers for intermittently transmitting very short messages indicative of status of stimuli associated with the transmitters. The transmitters can transmit independently of any rec... | 04/24/2007 |
| 7203497 | System and method for accurately computing the position of wireless devices inside high-rise buildings A system and method for providing a network of wireless devices including Mobile Terminals, Wireless Routers and a Local Control within a high rise building or other three dimensional deployment structure, such that communication, identification and position calcula... | 04/10/2007 |
| 7197282 | Mobile station loop-back signal processing Processing of loop-back information returned by one or more mobile stations that are served by a wireless communication network permits the network to compensate its transmit signals for increased transmission efficiency and reduced signal interference at the mobile... | 03/27/2007 |
| 7184458 | Reduced subset scan and dual frequency wakeup for bluetooth inquiry operation An inquiry message is transmitted successively on each of a first plurality of transmit frequencies (44–48) and thereafter successively on each of a second plurality of transmit frequencies (51), in order to ensure that a first wireless communication... | 02/27/2007 |
| 7164696 | Multi-carrier CDMA communication device, multi-carrier CDMA transmitting device, and multi-carrier CDMA receiving device The transmitter comprises a data/modulation control section (4) which sets predetermined parameters necessary for demodulation processing, sub-carrier group modulation processing sections (6a to 8c) which perform frequency spreadin... | 01/16/2007 |
| 7164664 | Method and system for allocating a carrier frequency in a radio communication system System that allocates a carrier frequency to a radio link, for transmitting data bursts between a remote unit and a fixed unit, by employing orthogonal frequency division multiplexing OFDM. The fixed unit records a predetermined number of parameters relative to the ... | 01/16/2007 |
| 7161920 | High rate, time division multiplexed, multi-MPSK MODEM with imbedded high signal-to-noise ratio tracking channel A novel MODEM and method of operating a MODEM usable in spread spectrum communication utilizing multiple waveforms in orthogonal spread signals imbeds a tracking signal in one of the spread signals for efficient tracking by a receiver so that both spread signals can... | 01/09/2007 |
| 7154938 | RF communications system utilizing digital modulation to transmit and receive data The RF communications system of the present invention wirelessly communicates data without encountering undue interference problems with other devices and complies with rules governing unlicensed, spectrum-sharing devices. In an example embodiment, a transmitter dev... | 12/26/2006 |
| 7151767 | Method and apparatus for synchronizing frequency hopping transceivers A slave radio transceiver for use in a frequency hopping radio system synchronizes by receiving on a sequence of simultaneous combinations of radio channels until a paging message is received from a master transceiver, and may then revert to single channel frequency... | 12/19/2006 |
| 7151790 | Automatic signal extraction and analysis from time-frequency representation The problem of operationally analyzing spread spectrum frequency-hopping transmissions has been known since the invention of frequency-hopping radios. A frequency-hopping radio transmits a communication using small signal segments of data making up the transmission ... | 12/19/2006 |
| 7149483 | Amplifying diversity signals using power amplifiers A method for amplifying diversity transmit signals includes receiving a transmit signal at a vector modulator, where the vector modulator processes the transmit signal to yield diversity transmit signals, amplifying each of the diversity transmit signals according t... | 12/12/2006 |
| 7139326 | Image-canceling quadrature modulator and method Canceling images in a quadrature modulator includes frequency shifting the baseband signal and images; filtering the frequency shifted baseband signal and images; phase and frequency shifting the baseband signal and images; filtering the phase and frequency shifted ... | 11/21/2006 |
| 7133380 | System and method for selecting a transmission channel in a wireless communication system that includes an adaptive array A method for establishing wireless communication between a transmitter and a receiver in a wireless communication system. The receiver includes an adaptive array that has at least two antennas. Each antenna receives a signal and produces a received signal. The trans... | 11/07/2006 |
| 7130327 | Digital frequency synthesis Frequency synthesis is implemented by providing a delta-sigma modulated signal associated with a selected frequency, which frequency can vary based on a selection input. The delta-sigma modulated signal is converted from the digital to analog domain. The delta-sigma... | 10/31/2006 |
| 7120190 | Low power RC clocking system for wireless communications A low-power sleep mode of operation for a frequency hopping radio receiver is presented. Digital circuits within the receiver operate based upon a high frequency clock source. During sleep mode, the circuits are clocked with a low-frequency clock source, which is ty... | 10/10/2006 |
| 7120198 | Quadrature product subcarrier modulation system A coherent adaptive subcarrier modulation system applies subcarrier modulation to quadrature modulated signals with constant envelope modulation suitable for efficient sinewave and squarewave subcarrier modulations. The quadrature subcarrier enables the addition of ... | 10/10/2006 |
| 7110351 | Enhanced ARQ with OFDM modulation symbols A method and apparatus are provided for error correction in a communication system employing Orthogonal Frequency Division Multiplexing. When a remote unit receives an OFDM symbol, a retransmission indicator bit is examined to determine whether the symbol is an orig... | 09/19/2006 |
