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| Number | Title | Issue Date |
| 8072873 | Adaptive coding and modulation using linked list data structures A process is described to build physical layer frames with a modcode adapted to the signal quality of a destination terminal. Data packets assigned to the same modcode may be sent in the same frame, although packets associated with higher modcodes may be used to com... | 12/06/2011 |
| 7978592 | Method and apparatus for signaling in multiple user one-slot operation in wireless communication Disclosed are multiple embodiments of method and apparatus to facilitate Multiple Users Reusing One Timeslot (MUROS) operation in wireless communications. A pair of wireless transmit/receive units (WTRUs) may be multiplexed onto a timeslot using a same pulse format.... | 07/12/2011 |
| 7706247 | Frequency offset differential pulse position modulation The present invention provides such a need by utilizing a frequency offset differential pulse position modulation scheme to transmit data between computing devices within a wireless network system. The differential pulse position modulation component of the scheme e... | 04/27/2010 |
| 7675842 | Adaptive coding and modulation using linked list data structures A process is described to build physical layer frames with a modcode adapted to the signal quality of a destination terminal. Data packets assigned to the same modcode may be sent in the same frame, although packets associated with higher modcodes may be used to com... | 03/09/2010 |
| 7626918 | Frequency offset differential pulse position modulation The present invention provides such a need by utilizing a frequency offset differential pulse position modulation scheme to transmit data between computing devices within a wireless network system. The differential pulse position modulation component of the scheme e... | 12/01/2009 |
| 7590044 | Method and apparatus for interleaving\within a communication system A method and apparatus for interleaving within a communication system is provided herein. More particularly parameters for a convolutional turbo code interleaver are provided, and interleaving takes place utilizing the new parameters. The new parameters generate int... | 09/15/2009 |
| 7561510 | Wireless LAN system A high-speed wireless LAN system capable of avoiding a collision of packets and maintaining the original transmission speed is provided. A transmitter is applied to an HT terminal using a second frequency band wider than a first frequency band used by a legacy termi... | 07/14/2009 |
| 7532563 | Mechanism to improve quality of channel estimates in OFDM transmissions An OFDM (Orthogonal Frequency Division Multiplexing) system may utilize pilot symbol structures including two or more pilot symbols with pilot information on alternate tones. The pilot information in one symbol is transmitted on mirror tones in another of the symbol... | 05/12/2009 |
| 7505395 | Parallel pulse code modulation system and method The present invention provides a parallel pulse code modulation system enabling the independent control of a plurality of groups of one or more electronic devices. A memory unit receives control data from an external source, and a multiplexer connected to the memory... | 03/17/2009 |
| 7489621 | Adaptive puncturing technique for multicarrier systems Various embodiments are described for adaptive puncturing techniques involving an adaptive bit loading block to select a modulation scheme and a puncturing pattern for each of a plurality of subcarriers or subcarrier bands based on subcarrier channel state informati... | 02/10/2009 |
| 7423958 | Transmitter for transmitting signals over radio channels and method for transmitting signals over radio channels A transmitter for sending signals over wireless channels and a method of sending signals over wireless channels are described. The transmitter and the method are used to determine a transfer characteristic of an amplifier (8) in the transmitter. Symbols in th... | 09/09/2008 |
| 7408872 | Modulation of signals for transmission in packets via an air interface The invention relates to a method and to a modulator for modulating signals. The signals are to be transmitted by a device in packets via an air interface. Each packet is supposed to comprise at least one entity of at least two different entities, which different en... | 08/05/2008 |
| 7391711 | Method and system for adaptive modulation Methods and systems for adaptive modulation are provided. In one embodiment, a method for a plurality of remote units of an orthogonal frequency division multiplexing multipoint-to-point communications system comprises: establishing communication between a plurality... | 06/24/2008 |
| 7391712 | Method and system for forward-looking tone allocation Methods and systems for forward-looking tone allocation are provided. In one embodiment, a method for an orthogonal frequency division multiplexing (OFDM) multipoint-to-point communications system comprises: establishing communication between a plurality of remote u... | 06/24/2008 |
| 7388911 | In-band-on-channel broadcast system for digital data An FM broadcast transmitter transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission bandwidth around the carrier. It includes a source of a modulated FM stereo signal having a ... | 06/17/2008 |
| 7376075 | Circular constellations with coherent gain/differential phase and pilots The modulation method and system of the presented herein involves mapping data onto a constellations comprising a set of concentric circles in a two-dimensional plane, one dimension for the amplitude and one for the phase. The phase dimension is coded differentially... | 05/20/2008 |
| 7363324 | Method, system and program for prioritizing maintenance of database tables There is disclosed a data processing system implemented method, a data processing system, and an article of manufacture for directing a data processing system to maintain a database table associated with an initial maintenance scheduling interval. The data processin... | 04/22/2008 |
| 7317758 | PCM-to-PWM converter The invention relates to a method and a device for converting a digital, pulse-coded signal (PCM) to a pulse-width-modulated signal (PWM), wherein the digital signal PCM, f(t) is multiplied by at least one derivative (f′(t), f″(t), . . . , f(n) (t)) o... | 01/08/2008 |
| 7295509 | Signaling method in an OFDM multiple access system A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time in... | 11/13/2007 |
| 7283011 | Method for performing dual phase pulse modulation A modulation method, referred to as dual phase pulse modulation (DPPM), represents digital data as a series of high and low pulses whose widths represent groups of M data bits, with both the high and low pulses representing successive M-bit groups. Each of the 2 | 10/16/2007 |
| 7233618 | Circuit configuration and method for transmitting digital signals To transmit digital signals, binary signals are transformed into a series of pulses, the pulses being modulated in their pulse length as a function of an information content of the binary signals. In a corresponding circuit configuration, a modulation unit is connec... | 06/19/2007 |
| 7230909 | Efficient activity resumption in point to multipoint service flow Orthogonal frequency division multiplexing (OFDM) is used to divide a single TDMA time slot into multiple non-contending access request opportunities that are reserved for particular subscriber units. An OFDM burst is divided into multiple tonesets where each tonese... | 06/12/2007 |
| 7200187 | Modulator for digital amplifier A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and is tuned to an idle frequency of the digital modulator. The digital ... | 04/03/2007 |
| 7187911 | Calibrated PLL for wide band communication semiconductor integrated polar loop transmitter The invention provides a communication semiconductor integrated circuit (RF IC) that, when a transmission oscillator is incorporated into a semiconductor chip, secures the oscillation operation over a wide frequency range, prevents a deterioration of a transmission ... | 03/06/2007 |
| 7180850 | Frequency offset differential pulse position modulation The present invention provides such a need by utilizing a frequency offset differential pulse position modulation scheme to transmit data between computing devices within a wireless network system. The differential pulse position modulation component of the scheme e... | 02/20/2007 |
| 7171182 | Frequency synthesizers for supporting voice communication and wireless networking standards Techniques are described that facilitate the generation of different waveforms at different frequencies required for transmission and reception of wireless voice signals and wireless data signals. For example, a technique may include generating a first waveform in a... | 01/30/2007 |
| 7154774 | Detecting switching of access elements of phase change memory cells A memory includes a storage element (OUM) made of a phase-change material for storing a logic value and an access element (OTS) switching from a higher resistance condition to a lower resistance condition in response to a selection of the memory cell, the access ele... | 12/26/2006 |
| 7146172 | Multi-carrier communications with adaptive cluster configuration and switching A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating a... | 12/05/2006 |
| 7099266 | Orthogonal frequency division multiplexed signal transmitting apparatus, orthogonal frequency division multiplexed signal receiving apparatus, and orthogonal frequency division multiplexed signal transmitting/receiving system An orthogonal frequency division multiplexed signal transmitting apparatus executes a time-division multiplexing process that inserts a reference signal at a predetermined interval based on reference signal position information into an information signal to be trans... | 08/29/2006 |
| 7095791 | OFDM interference cancellation based on training symbol interference Systems and methods for optimally combining signals from multiple antennas to ameliorate the effects of noise and/or interference on OFDM communications are provided. In one embodiment, an initial spatial statistical characterization of interference and/or noise is ... | 08/22/2006 |
| 7085544 | Transmitter having a phase control loop whose frequency bandwidth is varied in accordance with modulation modes A transmitter adopting a polar loop system including a phase control loop for controlling the phase of a carrier signal outputted from a transmitting oscillator and an amplitude control loop for controlling the amplitude of a transmitting output signal outputted fro... | 08/01/2006 |
| 7079812 | Systems and methods for interference mitigation with respect to periodic interferers in short-range wireless applications Several techniques are provided for use by wireless devices to avoid interference with signals that are of a periodic or quasi-periodic nature that may operate in the same frequency band and proximity. In some cases, the periodic signals are detected and their timin... | 07/18/2006 |
| 7079480 | Enhancing security and efficiency of wireless communications through structural embedding By embedding as a Physical Layer (PHY) Appliqué patterns (time, frequency, tone multiplexed, control signal, explicit network authentication, projective, other, or combined) on wireless electronic communications network (WECN) digital signal packets, and using a QR... | 07/18/2006 |
| 7079577 | Wide window decoder circuit for dual phase pulse modulation A dual phase pulse modulation (DPPM) decoder circuit processes a DPPM signal, which is in the form of a series of high and low pulses whose pulse widths represent successive groups of M data bits, so as to recover data carried by the signal. Each of the 2M | 07/18/2006 |
| 7065378 | Optimal use of request access TDMA slots for automatic level control Systems and methods for controlling subscriber unit power level using power measurements made on access request transmissions. Since a subscriber unit access request typically precedes a subscriber unit data transmission by a relatively short period of time, the dat... | 06/20/2006 |
| 7054658 | Pulse shaping according to modulation scheme A method is provided for defining a pulse function shape for acting on a data stream for transmission in a telecommunication system in accordance with a predetermined modulation scheme. The method comprises defining desired cost parameters (e.g., error functions for... | 05/30/2006 |
| 7046618 | Bridged ultra-wideband communication method and apparatus Systems, apparatus and methods are provided for bridging data to and from different communication physical layers and protocols. The present invention comprises a communication system structured to “bridge” between conventional, narrowband carrier wave communica... | 05/16/2006 |
| 7031251 | Clipping distortion canceller for OFDM signals Methods and apparatus are provided for reducing clipping noise from an OFDM signal, the methods and apparatus are operable to carry out actions including: (a) transforming a received orthogonal frequency division multiplexed (OFDM) signal from a transmission channel... | 04/18/2006 |
| 7013157 | Method for multicast delivery with designated acknowledgment A packet format for multicast messages which designates a single receiver to send an acknowledgment to the multicast message. The designated receiver responds to the multicast message with an acknowledgment. If the designated receiver does not respond to the multica... | 03/14/2006 |
| 7003032 | Generation of multiple independent high resolution pulse width modulations A method for generating multiple high-resolution PWM signals in which software interrupts are introduced at predetermined intervals to generate multiple high-resolution PWM signals from a conventional microprocessor. The software determines the purpose of the interr... | 02/21/2006 |
