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US20120099666 Method and Arrangement for Adapting a Signal in a Wireless Communications Network  
According to an aspect of the present invention, the power efficiency of a precoded OFDM signal is improved by a method in a network node 210, e.g. a mobile terminal, for adapting a signal for...
US20070297523 METHOD OF CALIBRATING THE TRANSMISSION CHAIN OF A WIRELESS TRANSCEIVER AND CORRESPONDING WIRELESS TRANSCEIVER  
A calibration is performed tone per tone during interframe spacing. A peak detection is used for measuring the level of the corresponding signal, and a gain correction coefficient is stored for...
US20100220670 Method for Scheduling to Reduce Inter-Cell Interference for Voice Communication in OFDMA  
A method schedules voice communication in an Orthogonal Frequency Division Multiplexing Access (OFDMA) network of base stations serving sets of mobile stations in cells. The method uses...
US20090310693 EFFICIENT CQI SIGNALING IN MULTI-BEAM MIMO SYSTEMS  
The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of...
US20120307922 UE SIGNAL QUALITY MEASUREMENTS ON A SUBSET OF RADIO RESOURCE ELEMENTS  
A user equipment (UE) receives a radio signal which includes a time-frequency grid of radio resource elements. A UE detector measures a signal quality parameter associated with a subset of the...
US20100265813 WIRELESS NETWORK AND METHOD FOR ADAPTIVE OPPORTUNISTIC CLUSTERING FOR INTERFERENCE ALIGNMENT IN WIRELESS NETWORKS  
Embodiments of a central scheduler and method for adaptive clustering are generally described herein. In some embodiments, a cluster of transmitter-receiver pairs is selected based on minimum...
US20110051673 SELECTIVELY ASSIGNING MOBILE STATIONS TO SEGMENTED ZONES  
A base station includes a transceiver, memory, and processor. The transceiver communicates with mobile stations. The memory stores a database of threshold CINR values. The processor implements a...
US20120045005 COMMUNICATION METHOD OF A TERMINAL AND AN ACCESS POINT FOR MULTI-USER TRANSMISSION OPPORTUNITY (TXOP) POWER SAVING  
Provided is a terminal and an access point in an active mode for multi-user transmission opportunity (TXOP) power saving that may decrease power consumption by changing an operation state of the...
US20090245401 MULTIDIMENSIONAL CONSTELLATIONS FOR CODED TRANSMISSION  
Techniques for rotating and transmitting multidimensional constellations are disclosed. A method for rotating a multidimensional constellation may include constructing a first rotation matrix,...
US20140286447 PEAK TO AVERAGE POWER RATIO SUPPRESSION  
A transmitter may comprise a first domain translation circuit, a first PAPR suppression circuit, and a descriptor generation circuit. The first domain translation circuit may convert a plurality...
US20090245088 COMMUNICATION EQUIPMENT WHICH RECEIVES OFDM SIGNAL, OFDM-BASED WIRELESS COMMUNICATION SYSTEM AND METHOD FOR RECEIVING OFDM SIGNAL  
When a receiving apparatus which employs a OFDM-based cellular wireless communication scheme detects as an excessive signal for each frame, the signal having signal intensity exceeding a reference...
US20100014603 GUARD INDEPENDENT SIGNAL MAPPING  
Systems and methodologies are described that facilitate guard bandwidth independent mapping and de-mapping of bandwidth in a wireless communication system. Broadcast signals can be created as if...
US20080298480 Asynchronous MIMO-OFDM spatial covariance estimation  
In general, in one aspect, the disclosure describes an apparatus that includes a sample averager to construct a preliminary estimate of a spatial covariance matrix from a received communications...
US20130121430 FEEDER LINK CONFIGURATIONS TO SUPPORT LAYERED MODULATION FOR DIGITAL SIGNALS  
Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system employs feeder link spot beam to antennas in distinct coverage areas to enable...
US20110164697 METHODS AND DEVICES FOR SPATIAL CODING  
Embodiments of the invention relates to a method in a controller node for distributing code text of a joint spatial coding in a communications network. The communications network comprises at...
US20070211810 ADAPTIVE SUBCARRIER LOADING  
A wireless multicarrier transmission method in which a multicarrier transmission uses n modulated frequency subcarriers (n is an integer number), and a fading condition of each subcarrier is...
US20050243938 Multicarrier modulation systems  
The invention provides a new approach which is better suited to FFT design as applied to multicarrier modulation systems such as OFDM. The signals are scaled so that overflow, rather than being...
US20090080549 Efficient MIMO precoding feedback scheme  
Methods and apparatus for efficiently feeding back preceding information in a multiple input multiple output (MIMO) system. A codebook including a plurality of codebook entries is constructed. A...
US20110243265 WIRELESS COMMUNICATION SYSTEM  
A wireless communication system is disclosed including a MIMO wireless communication apparatus that can communicate through multiple antennas and a non-MIMO wireless communication apparatus that...
US20090207768 OPTIMAL CROSS-LAYER SCHEDULING FOR MULTI-USER COMMUNICATION SYSTEMS WITH IMPERFECT CHANNEL STATE INFORMATION AND UNKNOWN INTERFERENCE  
The disclosed subject matter provides scheduling algorithms, methods, and systems that facilitate cross layer scheduling for systems with imperfect channel state information and unknown...
US20100172300 METHOD FOR IMPROVING REVERSE GAIN  
A method for improving reverse coverage is disclosed, comprising: A, when a base station requests a terminal to enable the reverse repetition, under the condition that the service quality...
US20080095255 Scattered pilot location detector  
The present invention provides a scattered pilot (SP) location detector capable of detecting patterns of SP symbols promptly without using a TMCC signal. The SP location detector comprises a...
US20100008331 BANDWIDTH ALLOCATION BASE STATION AND METHOD FOR ALLOCATING UPLINK BANDWIDTH USING SDMA  
Embodiments of a base station and methods for allocating uplink bandwidth using SDMA are generally described herein. In some embodiments, uplink bandwidth request messages are received on a...
US20090213945 Reduced Complexity Parametric Covariance Estimation for Precoded MIMO Transmissions  
A model-based technique for estimating impairment covariance associated with a MIMO signal is disclosed. In an exemplary method, an impairment model is constructed for a received composite...
US20080107192 Systems and Methods for Generalized Slot-to-Interlace Mapping  
A transmitter or receiver device includes a processing system configured to have one or more pilot interlace vectors and one or more distance vectors. The processing system is further configured...
US20120087425 CODEBOOK SUBSAMPLING FOR PUCCH FEEDBACK  
A method in a mobile communication terminal includes holding a definition of a sub-sampled codebook identifying precoding matrices to be used for providing precoding feedback by the terminal The...
US20120275529 Method for Transmitting an Information Sequence  
Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels....
US20090262849 Universal Blind Mode Detector, Guard Mode Detector of The Universal Blind Mode Detector, and Method of Detecting Universal Blind Mode  
Provided are a universal blind mode detector capable of universally detecting not only various orthogonal frequency division multiplexing (OFDM) communication services but also non-OFDM...
US20090310656 COMMUNICATION SYSTEM AND TECHNIQUE USING QR DECOMPOSITION WITH A TRIANGULAR SYSTOLIC ARRAY  
An apparatus, system, and method to perform QR decomposition of an input complex matrix are described. The apparatus may include a triangular systolic array to load the input complex matrix and an...
US20080240275 Scalable OFDM and OFDMA bandwidth allocation in communication systems  
Techniques for bandwidth allocation in communication systems such as OFDM, OFDMA, or SC-FDMA systems to improve spectral efficiency and increase flexibility and adaptability with scalable single...
US20060120469 Multiple antenna multicarrier transmitter and method for adaptive beamforming with transmit-power normalization  
In a multi-antenna, multicarrier transmitter, a multicarrier communication signal is generated by normalizing beamforming matrices based on an average subcarrier power loading for each of the...
US20070230598 OFDMA transmitter and method of transmitting OFDMA signals using compress-decompress modulation  
An Orthogonal Frequency Division Multiple Access (OFDMA) transmitter and method of transmitting OFDMA signals modulates outgoing data into compressed codes, which are temporarily stored in a data...
US20070147521 Interleaver design with multiple encoders for more than two transmit antennas in high throughput WLAN communication systems  
A MIMO communication system implements an interleaver design with multiple encoders for more than two transmit antennas for high throughput WLAN communication systems. Multiple encoders are...
US20090245392 METHOD AND SYSTEM FOR CONCEALING ERRORS  
A method for concealing errors includes that the transmitting end splits the received compressed video data into slice structures, allocates the adjacent slice structures to non-adjacent OFDM...
US20090141782 VOICE AND DATA COMMUNICATION SERVICES USING ORTHOGONAL SUB-CHANNELS  
A method for using orthogonal sub-channels (OSCs) in a wireless transmit/receive unit (WTRU). A capability report is received from the WTRU, including an indication whether the WTRU supports OSCs....
US20060062318 Method for the spectral configuration of signals modulated by means of orthogonal frequency division multiplexing (OFDM) for an electrical network  
It is characterized in that, maintaining the sampling frequency of the digital-analog converter of the transmitter and the analog-digital converter of the receiver, the bandwidth, the spectral...
US20090247172 LOW REUSE PREAMBLE FOR A WIRELESS COMMUNICATION NETWORK  
Techniques for sending low reuse preambles in a wireless network are described. In an aspect, a base station may send a low reuse preamble on reserved frequency resources to allow terminals to...
US20080285671 ADAPTIVE MAXLOGMAP-TYPE RECEIVER STRUCTURES  
A method and apparatus is disclosed herein for adaptive MaclogMAP-type receiver structures. In one embodiment, a device comprises a receiver to receive information-bearing signals from the...
US20120140835 CHANNEL ESTIMATION IN AN OFDM TRANSMISSION SYSTEM  
A method of channel estimation in an OFDM transmission system having a transmitter and a receiver according to standard IEEE 802.11x. The method includes: in the transmitter, setting an identifier...
US20080056397 I/Q imbalance compensation  
A ZIF direct-conversion OFDM receiver capable of estimating and correcting an I/Q imbalance in a baseband signal. A complex down-conversion is performed on a received signal r(t). The received...
US20090046788 Techniques for Reducing Precoding Overhead in a Multiple-Input Multiple-Output Wireless Communication System  
A technique of operating a wireless communication device in a multiple-input multiple-output wireless communication system includes receiving, at a first wireless communication device, recommended...
US20100310000 METHOD OF TRANSMITTING PRECODING INFORMATION IN MULTIPLE ANTENNA SYSTEM  
A method of transmitting precoding information in a multiple antenna system includes selecting M subbands from a plurality of subbands constituting a whole frequency band in a descending order of...
US20090232087 User Equipment Multiplexing In Downlink Multiuser, Multiple Input Multiple Output Orthogonal Frequency Division Multiple Access  
This invention is a method of downlink, multiuser, multiple input, multiple output communication between a single base station and plural user equipment. Resource buffers are distributed into...
US20110150113 Distortion-Aware multiple input multiple output precoding  
Precoding parameters used for precoding of a source are selected to minimize distortion that would otherwise be induced in the source during encoding and transmission of the source over a multiple...
US20070098096 WIRELESS TRANSMITTER, SIGNAL TO SUBCARRIER ALLOCATION METHOD FOR SYNCHRONIZING SYMBOL, AND WIRELESS RECEIVER  
A wireless transmitter for transmitting an OFDM symbol including a first generator to generate a plurality of first signals each including a stationary signal, a second generator to generate a...
US20100248656 WIRELESS COMMUNICATION METHOD, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION APPARATUS  
A wireless communication method MIMO communication using a wireless communication apparatus having N antennas includes performing first inverse-matrix determining processing which determines,...
US20100226357 Differential codebook for a wireless network, MIMO beamforming system using same, and method of reducing a quantization error in a MIMO beamforming system for a wireless network using same  
A differential codebook for a wireless network includes a plurality of codewords and [e1 . . . eNs] G as a center location of the plurality of codewords, where ek represents a column vector...
US20070110174 Time tracking for a receiver with guard interval correlation  
Techniques for performing time tracking at a receiver are described. A first arriving path (FAP) and a last arriving path (LAP) are detected based on a channel impulse response estimate for a...
US20100157911 METHOD AND APPARATUS FOR CONFIGURING RADIO FREQUENCY RESOURCES FOR A CUSTOMER PREMISES BASE STATION  
A method and apparatus are provided for manually or automatically configuring radio frequency (RF) resources for a customer premises base station (CPBS). In a manual embodiment, the CPBS prompts a...
US20100080136 UPLINK TRANSMIT DIVERSITY ENHANCEMENT  
A method for uplink transmit diversity enhancement is described. Two or more potential uplink transmission configurations are determined. Each potential uplink transmission configuration is...