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| Number | Title | Issue Date |
| 8160087 | Receiver apparatus and communication method A receiver apparatus wherein the processing amount for CQI (Channel Quality Indicator) measurements in a communication system having a plurality of system bandwidths can be reduced. In this apparatus, a narrow band CQI measurement part (109) measures, as a na... | 04/17/2012 |
| 8144720 | Uplink radio resource allocation in the presence of power limited users A base station in an OFDMA system which determines a modulation and coding scheme to use for a packet of a certain size to be transmitted by a Mobile Station. The base station schedules transmissions by mobile stations and transmits packets. The base station include... | 03/27/2012 |
| RE43128 | Method for transmitting data packets on carrier frequency with linear variation and transmitter implementing this method A method for transmitting data packets having a heading followed by a data field. The data of the field is transmitted by groups of symbols. According to the OFDM technique, subcarriers modulated by the groups are generated. A frequency modulation of a carrier signa... | 01/24/2012 |
| 8077735 | System and method for reliable communications over multiple packet RF networks The invention is a method and system for mobile communications. A mobile communicator communicates with a network routing center. The communicator monitors each of two or more wireless carriers for a service characteristic. The communicator selects, based on the mon... | 12/13/2011 |
| 8068510 | Demodulation apparatus for efficiently embodying adaptive modulation and coding method in OFDMA based packet communication system and method thereof Disclosed is a demodulation apparatus for receiving signals by an adaptive modulation and coding method, and demodulating the signals, in an OFDMA based packet communication system, comprising: a QAM demapper for performing QAM demapping to the received signals by a... | 11/29/2011 |
| 8031735 | Method and apparatus of selecting operating frequency for user equipment in a wireless communications system In order to prevent from being incapable of receiving Multimedia Broadcast Multicast Service, called MBMS hereinafter, service when a user equipment (UE) has a connection for signaling only, the present invention provides a method of selecting an MBMS operating freq... | 10/04/2011 |
| 8023523 | Communications systems In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence ... | 09/20/2011 |
| 7995602 | OFDM communication system and method having a reduced peak-to-average power ratio An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inver... | 08/09/2011 |
| 7995601 | System and method for distributing voice and data information over wireless and wireline networks A method and device for distributing both high-speed data service, such as digital computer, video and multimedia data, and lower speed data service, such as POTS voice telephone signals, throughout a customer premises. High-speed digital data and lower speed POTS v... | 08/09/2011 |
| 7970001 | Receiver apparatus and communication method in a communication system wherein a plurality of system bandwidths are set A receiver apparatus wherein the processing amount for CQI (Channel Quality Indicator) measurements in a communication system having a plurality of system bandwidths can be reduced. In this apparatus, a narrow band CQI measurement part (109) measures, as a na... | 06/28/2011 |
| 7929563 | System and/or method for channel estimation in communication systems Embodiments of methods, devices and/or systems for estimating channel state information are described. ... | 04/19/2011 |
| 7839881 | Projection headset A headset apparatus including a virtual keypad and a method for inputting data into a headset are provided. In one embodiment, a headset includes a processor, at least one acoustic transducer, a projector operably coupled to the processor for displaying an image on ... | 11/23/2010 |
| 7839880 | OFDM communication system and OFDM communication method In an OFDM communication system that performs OFDM data communication by dividing a band region into a plurality of bands and assigning each band to a mobile station, a base station monitors transmission characteristics of the bands and state of use of adjacent band... | 11/23/2010 |
| 7796630 | Method for estimating channels in two-hop MIMO AF networks A method estimates interim channels in a two-hop multi-input-multi-output (MIMO) amplify-and-forward (AF) relay network including a source station (SS), a relay station (RS), and a destination station (DS). The estimate is according to the overall channel obtained a... | 09/14/2010 |
| 7742494 | Method and related apparatus for improving MIMO procedure in a wireless communications system In order to save radio resources, the present invention provides a method for improving a multi-input multi-output, known as MIMO, procedure for a network of a wireless communications system. The method includes the following steps. Only two parameter values are use... | 06/22/2010 |
| 7697558 | Emergency alert system enhancement using alert server and metro ATM network for DSL deployment An emergency alert system for alerting DSL subscribers of imminent perils includes an alert server connected over a direct link to an edge node of a metro network for receiving an event notification, configuring from an event notification a highest priority alert me... | 04/13/2010 |
| 7577160 | MB-OFDM transmitter and receiver and signal processing method thereof A method of improving frequency diversity of a signal that includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols comprises receiving an input data sequence, mapping the input data sequence to a transmission data sequence, wherein the mapp... | 08/18/2009 |
| 7558282 | OFDM communication system and method having a reduced peak-to-average power ratio An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inver... | 07/07/2009 |
| 7483444 | Realtime power control in OFDM systems Systems and methods for efficiently transmitting power level information in a point to multipoint wireless system. Multiple subscriber units may transmit indications of their power level within a shared burst where one or more subchannels are allocated to each subsc... | 01/27/2009 |
| 7430215 | Interleaver, deinterleaver, interleaving method, and deinterleaving method for OFDM data An interleaver and interleaving method each includes two stages, and is useful in coded orthogonal frequency division multiplexed (COFDM) wireless local area networks. A first stage performs a first block permutation and a second stage performs bit order permutation... | 09/30/2008 |
| 7394985 | Wavelength access server (WAS) architecture A wavelength access server (WAS) architecture provides aggregation of traffic streams of diverse data communication protocols as well as provision of wavelength resources in an optical transport network. The WAS provides functions such as service traffic adaptation,... | 07/01/2008 |
| 7385959 | Power-efficient channel condition feedback for OFDM channels A wireless data communications device having a corresponding method and computer program comprises a Multiple Input, Multiple Output (MIMO) transceiver to communicate on an Orthogonal Frequency Division Modulation (OFDM) channel; a measurement circuit having an acti... | 06/10/2008 |
| 7379477 | Apparatus and method for efficiently transmitting broadcasting channel utilizing cyclic delay diversity Disclosed are an apparatus and a method for efficiently transmitting a broadcasting channel by means of cyclic delay diversity in an OFDM mobile communication system. The method comprises the steps of setting each transmitter to have different delay values, the tran... | 05/27/2008 |
| 7369566 | Method and system for DSL power saving Method and system for reducing power dissipation for data transmission from a transmitter to a receiver in a digital subscriber line (DSL) system when a rate of available data is below a first predetermined data rate for a predetermined length of time. The method in... | 05/06/2008 |
| 7366243 | Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation A technique for transmitting a spread spectrum signal using plural non-contiguous frequency bands separated by segments of frequency spectrum excluded from use involves: generating a digital time-domain spread spectrum signal; converting the time-domain signal to a ... | 04/29/2008 |
| 7352689 | Method for optimizing phase factor of sub-block signal in partial transmit sequence orthogonal frequency division multiplexing system A method for optimizing phase factors in partial transmit sequence orthogonal frequency division multiplexing system. The method includes initializing sub-block signals by applying an initial phase factor to the sub-block signals in all sub-blocks; setting a referen... | 04/01/2008 |
| 7339881 | Method and apparatus for encoding compressible data for transmission over variable quality communication channel A multi-carrier communication system (400) groups subchannels (802) into different quality-of-signal (QoS) regions (804). An unconstrained optimization process (1200) is performed independently for the subchannels (802) of the diff... | 03/04/2008 |
| 7330425 | Method and apparatus for permanent sub-network connections in a communication network Methods and apparatus implementing and using techniques for creating a permanent sub-network connection in a network of connected nodes. A route including a working path for a permanent sub-network connection is defined in the network from an ingress node to an egre... | 02/12/2008 |
| 7310318 | Method and system for using optical phase conjugation in an optical communications network A optical communications network including at least one optical phase conjugator for compensating for non-linear effects. The optical communications network includes at least one dispersion compensation module before the optical phase conjugator and at least one dis... | 12/18/2007 |
| 7310301 | Multi-carrier modulation with source information allocated over variable quality communication channel A multi-carrier communication system (400) groups subchannels (802) into different quality-of-signal (QoS) regions (804). An unconstrained optimization process (1200) is performed independently for the subchannels (802) of the diff... | 12/18/2007 |
| 7305006 | System for allowing a single device to share multiple transmission lines A front end, such as can be used in a Home Phoneline Networking Alliance network, may connected to a plurality of transmission lines. Each of the plurality of transmission lines may connected to one or more devices, such as a plain old telephone service device or an... | 12/04/2007 |
| 7298691 | Method and protocol to adapt each unique connection in a multi-node network to a maximum data rate A rate-adaptive mechanism for optimizing transmitter/receiver connections on a carrier-by-carrier basis for maximum date rate based on channel attributes for that connection and direction. Channel information is produced by a channel adaptation process based on chan... | 11/20/2007 |
| 7295566 | SVC signaling system and method The Intelligent Multiservice Access System (IMAS) enables support for the next generation of virtual connections. Regardless of whether the communications lines coupled to the inputs and outputs of the IMAS are based on SVC, PVC, or a combination of PVC and SVC, the... | 11/13/2007 |
| 7289484 | Call-fail-safe method for wireless traffic distribution across bands This invention presents an efficient and efficacious method for an equitable distribution of wireless traffic across the 800 and 1900 MHz bands. Even though traffic distribution across bands is desirable, there is a risk of call failure because of location of the mo... | 10/30/2007 |
| 7280496 | Methods and apparatus for coupling a satellite to an earth terminal Methods and apparatus are provided for coupling a satellite to an earth terminal. The apparatus inputs of the satellite that is configured to receive digital uplink signals, an autoscaling digital multiplexer of the satellite that is configured to digitally multiple... | 10/09/2007 |
| 7280497 | Methods and apparatus for coupling an earth terminal to a satellite Methods and apparatus are provided for coupling an earth terminal to a satellite The apparatus comprises multiple inputs of the earth terminal configured to receive multiple digital communication signals, a autoscaling digital multiplexer of the earth terminal confi... | 10/09/2007 |
| 7280800 | Wireless communication device, wireless communication system, wireless communication method and vehicle A wireless communication device for performing wireless communications between a plurality of terminals embraced by a multi-hop wireless communication network, includes first communication means for transmitting and receiving neighboring terminal information at a fi... | 10/09/2007 |
| 7277512 | Systems and methods for accounting for intercarrier interference in transmission systems A device that transmits data using discrete multitone modulation includes a memory that stores intercarrier interference (ICI) information for each of the tones used to transmit data. The device also includes logic that receives signals transmitted from another devi... | 10/02/2007 |
| 7269127 | Preamble structures for single-input, single-output (SISO) and multi-input, multi-output (MIMO) communication systems A communication system is provided herein for transmitting frames across a channel. The frames may be transmitted in single-input, single-output (SISO) and/or multi-input, multi-output (MIMO) communication systems. One such frame includes at least one training symbo... | 09/11/2007 |
| 7260054 | SINR measurement method for OFDM communications systems A signal to interference-plus-noise power ratio (SINR) measurement method for wireless communications systems which employ orthogonal frequency division multiplexing (OFDM) for multicarrier data transmission is disclosed. Fast-Fourier transform (FFT)-based SINR meas... | 08/21/2007 |
