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| Number | Title | Issue Date |
| 8189455 | Coding information for communication over an orthogonal frequency division multiple access (OFDMA)-based wireless link In a wireless access network, a transmitter provides a pool of sequences having a reduced peak-to-average power ratio. Information to be transmitted is mapped to a selected at least one of the pool of sequences. The selected at least one sequence is transmitted over... | 05/29/2012 |
| 8184523 | Method and system for compensation of a carrier frequency offset in an OFDM receiver An Orthogonal Frequency Division Multiplexing (OFDM) receiver that employs N second-order phase-lock loops sharing a common integrator (where N is the number of pilots in the system). The N second order phase-lock loops track out independent pilot phase rotations to... | 05/22/2012 |
| 8184524 | Adaptive puncturing technique for multicarrier systems Various embodiments are described for adaptive puncturing techniques. An adaptive bit loading block may select different modulation schemes and puncturing patterns for different subcarriers of a communications channel based on channel state information for one or mo... | 05/22/2012 |
| 8179783 | System and method of modulation and coding scheme adjustment for a LTE shared data channel A system, method and node for modulation and coding scheme adjustment for a Long Term Evolution (LTE) shared Data Channel. The method determines an actual number of orthogonal frequency division multiplexing (OFDM) symbols, NOS utilized for the shared Dat... | 05/15/2012 |
| 8179782 | Signal judgment apparatus and signal judgment method An FFT unit (170) separates a received symbol by Fourier conversion into a plurality of subcarriers, and a phase difference detection unit (193) detects a phase difference between 4 pilot carriers and data carriers adjacent to the pilot carriers (adjac... | 05/15/2012 |
| 8179780 | Method and apparatus for transmitting and receiving control information to randomize inter-cell interference in a mobile communication system A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. A control channel signal is generat... | 05/15/2012 |
| 8179781 | Method and apparatus for encoding data for transmission in a communication system A method and apparatus for encoding data for transmission in a communication system provides increased efficiency in bandwidth utilization through higher data rates, lower error rates, lower power levels, and/or increased capacity. A set of orthogonal codes is parti... | 05/15/2012 |
| 8174958 | Method and system for a reference signal (RS) timing loop for OFDM symbol synchronization and tracking Aspects of a method and system for a reference signal (RS) timing loop for OFDM symbol synchronization and tracking may include tracking symbol timing in an Orthogonal Frequency Division Multiplexing (OFDM) signal based on at least a reference symbol set. A receiver... | 05/08/2012 |
| 8174959 | Auction based resource allocation in wireless systems Systems and methods to assign one or more resources in a multi-user cellular Orthogonal Frequency-Division Multiple Access (OFDMA) uplink includes specifying a resource allocation problem for one or more resources; converting the resource allocation problem into an ... | 05/08/2012 |
| 8174957 | Method for allocating reference signals in MIMO system There is provided a method for placing reference signals in a wireless communication system. The method includes preparing a plurality of sub-frames for a plurality of antennas, placing a reference signal for one sub-frame and placing a reference signal for another ... | 05/08/2012 |
| 8174960 | Wireless communication system based on code spreading-orthogonal frequency division multiple access and smart antenna A time division duplex wireless communication system based on Code Spreading-Orthogonal Frequency Division Multiple Access (CS-OFDMA) and a smart antenna includes: an antenna array and multichannel transceiver, a space processor, a demodulator, an L2 processor and a... | 05/08/2012 |
| 8169889 | Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system A multi-antenna transmitting entity transmits data to a single- or multi-antenna receiving entity using (1) a steered mode to direct the data transmission toward the receiving entity or (2) a pseudo-random transmit steering (PRTS) mode to randomize the effective cha... | 05/01/2012 |
| 8165009 | Adaptive scheduling of voice traffic in a multi-carrier communication environment The present invention provides a technique for scheduling data, and in particular, scheduling real-time or voice data for transmissions during a transmit time interval in a multi-carrier communication environment. For each transmit time interval, channel condition i... | 04/24/2012 |
| 8165010 | OFDMA preambles system and method A preamble code usable in Orthogonal Frequency Division Multiple Access (OFDMA) for the physical layer (PHY), selected for improved PAPR in a 1024, 512 or 128 FFT OFDMA mode. Tables 2 to 7 detail code sequences having improved PAPR performance. The disclosed codes m... | 04/24/2012 |
| 8159931 | Orthogonal pilot code construction A method, system and apparatus for communication in an Orthogonal Frequency Division Multiplexing (OFDM) communication system is provided. The method includes allocating a plurality of sequences to a plurality of sectors in the OFDMA communication system. The plural... | 04/17/2012 |
| 8159933 | Method and system for providing broadband access to a data network via gas pipes A method and system for providing broadband access to a data network via gas pipes is disclosed. Embodiments of the present invention utilize Orthogonal Frequency-Division Multiplexing (OFDM) or Frequency-Division Multiplexing (FDM) as a modulation technique in orde... | 04/17/2012 |
| 8159932 | Initial timing estimation in a wireless network receiver An apparatus for and a method of wirelessly receiving a signal, and detecting a start of packet (SOP) from the received signal using at least one SOP detection criterion. In the case an SOP is detected, determining a plurality of metrics from the received signal, an... | 04/17/2012 |
| RE43305 | Transmission system for OFDM-signals with optimized synchronization The present invention relates to a transmission apparatus for transmitting OFDM-signals comprising modulation means 4 for modulating said signals onto a plurality of subcarriers using a OFDM-modulation method, transformation means 5 for transforming sa... | 04/10/2012 |
| 8154984 | Method for generating mutually orthogonal signals having a controlled spectrum A method for generating mutually orthogonal signals having a controlled spectrum, includes the generation of a plurality of mutually orthogonal, controlled-power discrete spectra s(i) having dimension Q, i designating spectrum number. The aforementioned spectra repr... | 04/10/2012 |
| 8154982 | Apparatus and method for dynamically assigning orthogonal codes in a radio communication system An apparatus. method, and system for dynamically assigning orthogonal codes to different information signals communicated between a Node B and user equipment in a cellular radio communication system in which a fixed number of codes are allocated between dedicated tr... | 04/10/2012 |
| 8154983 | System and method for the placement of rank information in a physical uplink shared channel A wireless communication network includes a plurality of base stations capable of wireless communication with a plurality of subscriber stations within a coverage area of the network. At least one of the plurality of base stations is capable of selecting up to four ... | 04/10/2012 |
| 8149684 | Code space sharing among multiple modes of operation The code space associated with the communication system is divided into at least two subspaces where each subspace is assigned to a different mode of operation. In one mode, such as a voice mode, each user is given full time access to a portion of the subspace assoc... | 04/03/2012 |
| 8149685 | Covert OFDM transmission using cyclic prefix Methods for secure OFDM communications include changing the length of OFDM symbols in a pseudo-random fashion by appending a totally random signal to some of the OFDM symbols. An adaptive cyclic prefix is provided for covert and spectrally efficient communication. A... | 04/03/2012 |
| 8149686 | Base station apparatus, mobile station apparatus and synchronization channel transmission method A base station apparatus is disclosed for use in a mobile communication system including multiple cells having multiple sectors. The base station apparatus includes a synchronization channel generation unit configured to generate a synchronization channel for use in... | 04/03/2012 |
| 8144572 | Detection and mitigation of interference and jammers in an OFDM system The present invention provides a method and apparatus for detecting interference in a wireless communications system. The invention compares the receiver FFT output of a received signal against known sequences such as the packet synchronization sequence, frame synch... | 03/27/2012 |
| 8139473 | Radio communication mobile station apparatus and radio communication method Provided is a mobile station capable of effectively reporting control information in RACH. In the mobile station, a signature selection unit (111) selects one of different code sequences as a signature according to inputted control information and a modulatio... | 03/20/2012 |
| 8134914 | Subcarrier allocation apparatus and method, subcarrier de-allocation apparatus and method in OFDM system A subcarrier allocating apparatus allocating data to be transmitted to a plurality of orthogonal subcarriers in an orthogonal frequency division multiplexing (OFDM) system is provided. The apparatus includes a logical index generator generating a logical index for a... | 03/13/2012 |
| 8134913 | Ultra-wide bandwidth system and method for in-premises wireless networking An IS-OFDM system for ultra-wideband (UWB) wireless communications that suppresses narrow-band interference, comprising an in-premises base station (IBS) is described. The IBS further comprises an IS-OFDM transceiver for communicating with a plurality of in-premises... | 03/13/2012 |
| 8130631 | Orthogonal frequency division multiplexing synchronization Embodiments are directed to first and second OFDM pilot symbols. The first and second pilot symbols may have first and second sets, respectively, of allowed, forbidden, and active carrier frequencies. The second sets of carrier frequencies may be formed by frequency... | 03/06/2012 |
| 8130630 | Apparatus for generating down link signal, and method and apparatus for cell search in cellular system A method for generating a downlink signal and searching for a cell from the downlink signal in an OFDM-based cellular system is provided. Thus, a pilot pattern is formed in the downlink signal, and the pilot pattern is formed of a product of a cell-specific scrambli... | 03/06/2012 |
| 8125887 | Mobile communication system, its scramble code assigning method, mobile station, and base station An object of the present invention is to reduce the amount of calculation performed in a mobile station and amount of information exchanged between a base station and mobile station in a mobile communication system where the base station autonomously assigns a scram... | 02/28/2012 |
| 8125886 | System, apparatus, and method for spatial multiplexing with symbol spreading The present invention provides a system (400), device (200, 300), and method (200) for a spatial multiplexing (SMX) transmission scheme combined with symbol spreading and rotation using a pre-determined matrix R, which can greatly improve system... | 02/28/2012 |
| 8121021 | Data transmission method for orthogonal frequency division multiplexing system A data transmission method for orthogonal frequency division multiplexing system, specifically comprises sending M, which is greater than 1, OFDM symbols included in each data transmission unit with different bandwidth, wherein each data transmission unit with diffe... | 02/21/2012 |
| 8121022 | MIMO OFDM system A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antenn... | 02/21/2012 |
| 8111608 | Radio-communication device and radio-communication method A radio-communication device performs processing in a communication environment in which an OFDM (Orthogonal Frequency Division Multiplexing) modulation method is used. The radio-communication device includes a signal-reception unit that receives a MIMO (Multi Input... | 02/07/2012 |
| 8111607 | Frequency division multiplexing system with selectable rate An OFDM system uses a normal mode which has a symbol length T, a guard time TG and a set of N sub-carriers, which are orthogonal over the time T, and one or more fallback modes which have symbol lengths KT and guard times KTG where K is an integer greater than unity... | 02/07/2012 |
| 8111609 | Mapping resource blocks into subchannels According to an example embodiment, a method may include determining, by a first wireless node in a wireless network, a number N of resource blocks available for transmitting data within a cell, the N resource blocks each including V resource block orthogonal freque... | 02/07/2012 |
| 8102755 | Method for mapping a physical downlink control format indicator channel to physical resources A method for mapping a physical downlink control format indicator channel to physical resources includes the steps that 16 modulated data y(0), y(1), . . . , y(15) of a downlink control signaling indicator channel in an LTE system are divided into 4 groups in order ... | 01/24/2012 |
| 8098568 | 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... | 01/17/2012 |
| 8098569 | 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... | 01/17/2012 |
