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US20130077469 Preambles in OFDMA System  
The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs...
US20130077468 Preambles in OFDMA System  
The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs...
US20130088950 METHOD AND DEVICE FOR SINR ESTIMATION  
A method (200) for a transceiver in a mobile system for determining the SINR for signals from at least two User Equipments during a future time interval, comprising arranging the transceiver to...
US20110242964 DOWNLINK ACQUISITION  
The subject matter disclosed herein provides methods and apparatus, including computer program products, for detecting a preamble to enable acquisition of a downlink. In one aspect, there is...
US20110116360 OFDM SYSTEM AND METHOD EMPLOYING OFDM SYMBOLS WITH KNOWN OR INFORMATION-CONTAINING PREFIXES  
Systems and methods for transmitting and receiving OFDM symbols are provided which enable the otherwise wasted transmission time normally used as a prefix for each OFDM symbol to contain useful...
US20110007627 METHOD AND APPARATUS FOR GENERATING RANGING PREAMBLE CODE IN WIRELESS COMMUNICATION SYSTEM  
A method and apparatus of generating a ranging preamble code in a wireless communication system is provided. A mobile station (MS) generates one of a plurality of ranging preamble codes, wherein...
US20110044161 RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION METHOD, AND PROGRAM  
A radio communication system according to the present invention has a plurality of radio communication devices that transmit and receive subframes one by one. Each of the plurality of radio...
US20130039165 DISCRETE FOURIER CALCULATION DEVICE, RADIO COMMUNICATION DEVICE, AND DISCRETE FOURIER CALCULATION METHOD  
A discrete Fourier calculation device includes a twiddle factor table storage unit that stores therein a twiddle factor table that associates twiddle factors with phases of the corresponding...
US20110069605 COAXIAL NETWORK COMMUNICATION NODE AND METHODS FOR COMMUNICATING MULTIMEDIA OVER A COAXIAL NETWORK WITH REDUCED-LENGTH CYCLIC PREFIXES  
A coaxial network communication node receives multimedia content with one or more other nodes in a coaxial network. The node determines a delay-spread of a coaxial channel based on receipt of a...
US20090296842 SOFT OUTPUT M-ALGORITHM RECEIVER STRUCTURES WITH GENERALIZED SURVIVOR SELECTION CRITERIA FOR MIMO SYSTEMS  
A method and apparatus is disclosed herein for a modified soft output M-algorithm. In one embodiment, the soft output M-algorithm is employed by a receiver in a wireless communication system to...
US20090257344 ALL OPTICAL OFDM WITH INTEGRATED COUPLER BASED IFFT/FFT AND PULSE INTERLEAVING  
A method and apparatus for all optical orthogonal frequency division multiplexing (OFDM) employing Inverse Fast Fourier Transform/Fast Fourier Transform by integrated coupler interferometrically.
US20150029831 LTE-Advanced Transmit Diversity Decoders  
Various embodiments of a transmit diversity decoding techniques are provided. In one aspect, a method receives a first input that includes signals transmitted by M transmit antennas on C channels...
US20090323513 WEIGHTED TONE RESERVATION FOR OFDM PAPR REDUCTION  
A weighted tone reservation (WTR) method and system are disclosed, for PAPR reduction. The WTR method solves the peak re-growth problem with minimum overhead. By avoiding the drawbacks of...
US20050271088 Method of using guard tones in OFDM systems for increasing robustness  
The present invention provides a method and system for increasing communication robustness between wireless communication devices by transmitting data on Orthogonal Frequency Division Multiplexing...
US20100313094 COMMUNICATION DEVICE  
A communication device is provided with a partial Fourier transformation circuit that calculates a correction parameter for quadrature errors correction. The partial Fourier transformation circuit...
US20110103219 METHOD AND APPARATUS FOR GENERATING RANGING PREAMBLE CODE IN WIRELESS COMMUNICATION SYSTEM  
A method and apparatus of generating a ranging preamble code in a wireless communication system comprises generating a Zadoff-Chu (ZC) sequence in which a cyclic shift is applied to each of a...
US20120314561 Method and apparatus for implementing preamble generation  
The disclosure involves a method and an apparatus for implementing preamble generation. The method comprises: obtaining a first parameter value according to a root sequence number of a Zadoff-Chu...
US20100080113 TONE RESERVATION TECHNIQUES FOR REDUCING PEAK-TO-AVERAGE POWER RATIOS  
Embodiments of the present disclosure describe closed loop scheduled peak-to-average power (PAPR) reduction systems and methods to facilitate desired PAPR reduction. Other embodiments describe...
US20090231993 Methods of uplink channelization in LTE  
Methods of a slot-level remapping physical uplink control channels into two resource blocks respectively located at two slots of a subframe, are generally adapted to a 3GPP LTE physical uplink...
US20070147336 Preamble configuring method in the wireless lam system, and a method for a frame synchronization  
A method of configuring a preamble of a downlink frame for synchronization in data frame transmission of a 60 GHz a wireless local area network system, the method comprising arranging a short...
US20150003226 DETECTION OF CABLE NETWORK INTERFERENCE ON WIRELESS NETWORK  
Described are methods and devices for detecting cable network interference on a wireless network. In one aspect, disclosed is a method, performed by a processor of a cable interference detection...
US20090088176 Method for Reducing Inter-Cell Interference in Wireless OFDMA Networks  
Protocols for OFDM/OFDMA/SC-FDMA based wireless networks provide adaptive inter-cell interference management without explicit spectrum or frequency planning. Base stations and mobile stations...
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...
US20070268811 Telecommunication system and method  
An arrangement for use in a telecommunication system includes a binder of subscriber lines, a local transceiver circuit, and a far-end crosstalk cancellation circuit. Each of the subscriber lines...
US20080304404 ARCHITECTURE FOR OWA BASED TDD-OFDM SYSTEM  
As no single wireless standard can provide both broadband high-speed and seamless mobility for commercial wireless communications in terms of technology, cost, spectrum and performance, a new...
US20100302930 Low Power Quality-Energy Scalable OFDMA Baseband Design  
In an energy scalable OFDMA energy metric baseband design for an OFDM transmission process operable using a QoS-guaranteed adaptive resource allocation algorithm, the improvement of effecting...
US20070076589 Method and device for handling ranging signals in a wireless communications network  
A method is described for detecting and/or estimating a ranging signal in a wireless communications network, wherein the ranging signal comprises a plurality of tiles. The method comprising the...
US20090181687 Sounding reference signal arrangement  
A method, apparatus, and computer program embodied on a computer-readable medium to create an uplink message to be transmitted to a base station, the created uplink message comprises a sounding...
US20080310296 Systems and Methods for Transmit-Only Peak-to-Average Ratio Reduction in the Oversampled Regime Using Reserved Tones  
Systems and methods for reducing the peak-to-average power ratio (PAR) at the transmitter can reduce the dynamic range required in various analog components. PAR can be reduced by applying a...
US20110310725 SOFT HANDOFF IN OFDMA SYSTEM  
Soft handoff in an OFDMA system is disclosed. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a...
US20090103428 SYSTEM FOR GENERATING SPACE FREQUENCY BLOCK CODE RELAY SIGNAL AND METHOD THEREOF  
A method and system for generating a space frequency block code relay signal includes a signal detection unit which detects a received signal by receiving a first and second source signals...
US20120275291 WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD  
By using a discrete Fourier transform equation that is used to transform N data values (N is an integer equal to or greater than one) to N transformation values, a wireless communication apparatus...
US20090185476 DURATION-SHORTENED OFDM SYMBOLS  
A communications network comprises a base station (28) and a wireless terminal (30) which communicate a frame (F) of information over an air interface (32). The frame (F) is prepared or processed...
US20090040918 Random Access Preamble Detection for Long Term Evolution Wireless Networks  
This invention is a method for preamble detection with estimation of UE timing advance (TA) and channel quality information (CQI) which uses a sliding window to detect the preamble and estimate...
US20110299382 COMMUNICATION DEVICES FOR GENERATING AND USING A MATRIX-MAPPED SEQUENCE  
A communication device for generating a matrix-mapped sequence is described. The communication device includes sequence generation circuitry. The communication device also includes mapping...
US20070097856 UNITARY PRECODING BASED ON RANDOMIZED FFT MATRICES  
Systems and methodologies are described that facilitate constructing unitary matrices that may be utilized in linear precoding for multiple-input multiple-output (MIMO) wireless communication...
US20110280117 BACKWARD-COMPATIBLE LONG TRAINING SEQUENCES FOR WIRELESS COMMUNICATION NETWORKS  
A network device for generating an expanded long training sequence with a minimal peak-to-average ratio. The network device includes a signal generating circuit for generating the expanded long...
US20140286153 APPARATUS AND METHODS FOR UPDATE OF SYMBOL INFORMATION  
Apparatus and methods for updating symbol information in a communication device with hardware such as a microcontroller are disclosed. The disclosed apparatus and methods employ waiting for the...
US20090213724 METHOD AND SYSTEM FOR I/Q BRANCH EQUALIZATION IN OFDM SYSTEMS  
Aspects of a method and system for I/Q branch equalization in OFDM systems may include determining a transfer function mismatch between an in-phase processing branch, and/or a quadrature...
US20090274039 WIRELESS COMMUNICATION DEVICE ADOPTING OFDM MODULATION  
A wireless communication device includes a converting circuit, a discrete Fourier transformer, a separating circuit, a correcting unit. The converting circuit converts an analog signal having an...
US20110299384 PILOT SIGNAL IN AN FDMA COMMUNICATION SYSTEM  
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier...
US20110299380 PILOT SIGNAL IN AN FDMA COMMUNICATION SYSTEM  
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier...
US20120314560 INTERFERENCE REJECTION METHOD BASED ON MULTIPLE SUB-BAND PROJECTIONS  
This invention describes a cognitive radio signal processing where interference is mitigated using multiple frequency spatial projection to orthogonalize interference. The method is based on the...
US20090154336 CONTINUOUS PHASE MODULATION PROCESSING FOR WIRELESS NETWORKS  
Various example embodiments are disclosed herein. According to an example embodiment, a method may include receiving a plurality of data symbols, generating a continuous phase modulated waveform...
US20080084818 BROADCAST AND MULTICAST SERVICES (BCMCS) FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM)-BASED MOBILE BROADBAND WIRELESS CELLULAR SYSTEMS  
Methods are provided for transmitting BCMCS in mobile broadband wireless cellular systems under development.
US20100080308 VIRTUAL MULTICARRIER DESIGN FOR ORTHOGONAL FREQUENCY DIVISION ...  
Embodiments of the present invention provide a virtual multicarrier design for orthogonal frequency division multiple access communications. Other embodiments may be described and claimed.
US20100034078 WIRELESS COMMUNICATIONS EQUIPMENTS WITH FUNCTION OF DETECTING RANDOM ACCESS SIGNAL, WIRELESS COMMUNICATIONS SYSTEMS WITH FUNCTION OF DETECTING RANDOM ACCESS SIGNAL AND METHOD OF RANDOM ACCESS SIGNAL DETECTION  
In a method by which a base station detects a random access signal transmitted by a user equipment to send a transmission request to the base station in uplinks, the base station omits a MF used...
US20110058471 OFDEM SYSTEM AND NYQUIST PULSE SHAPING METHOD WITH HIGH SPECTRUM EFFICIENCY  
A receiver system to receive an orthogonal frequency division multiplexing (OFDM) symbol of a certain spectrum efficiency. The receiver system includes a guard interval remover, a memory device,...
US20060227701 System for modeling digital pulses having specific FMOP properties  
A system samples data of a digital pulse. The system includes a processor, an integrator, and a converter. The processor computes a discrete Fourier transform of frequency data of the digital...
US20090196166 RECEIVER AND FREQUENCY INFORMATION ESTIMATING METHOD  
A receiver 100 has a Fourier transform section 105 Fourier-transforming symbols for propagation path estimation including subcarriers modulated by known signals different for two or more antennas...
Matches 1 - 50 out of 378 1 2 3 4 5 6 7 8 >