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7620115 |
Space code block coding and spreading apparatus and method for transmission diversity and CDMA diversity transmitter and CDMA mobile station receiver using the same
A space code block coding and spreading apparatus for transmission diversity, a Code Division Multiple Access (CDMA) diversity transmitter using it, and a CDMA mobile station receiver for receiving...
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7619963 |
OFDM signal frame generator, transmitter, signal transmission system and OFDM signal frame generating method
An OFDM signal frame generator includes a rate determiner configured to determine rate information to generate a signal frame to be transmitted as an OFDM signal based on a value of a received...
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7616557 |
Method and apparatus for canceling intercarrier interference through conjugate transmission for multicarrier communication systems
A system and method for reducing ICI in multicarrier systems is disclosed. The system uses a primary transmission path to transmit a first signal using the same techniques as conventional OFDM and...
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7616556 |
Wireless multicarrier system with subcarriers reserved for communication between unsynchronized nodes
In a system applying orthogonal frequency division multiplexing, OFDM, a number of carriers are reserved for communication between unsynchronized nodes (N 1 , N 2 ). At least one such reserved...
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7613243 |
Interleaver and parser for OFDM MIMO systems
A MIMO wireless system includes a transmitter that has a transmitter having a parser that parses a bit stream into multiple spatial data streams and multiple interleavers corresponding to the...
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7613104 |
Method, apparatus and computer program product providing synchronization for OFDMA downlink signal
Disclosed is a method, a computer program product and a device that includes a receiver for receiving a downlink signal transmitted into a cell. The receiver is operable to obtain time, carrier...
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7610025 |
Antenna array pattern distortion mitigation
At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than...
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7609749 |
Method and apparatus for generating non-recursive variable rate orthogonal spreading codes
A method for constructing and selecting non-recursive orthogonal variable spreading factor (OVSF) codes is provided. The method includes: defining a variable B=SF max /SF min , where SF max is a...
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7609616 |
Sparse channel estimation for orthogonal frequency division multiplexed signals
A computationally efficient channel estimation technique for use within an orthogonal frequency division multiplexing (OFDM) communication system determines coefficients of a channel transfer...
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7609615 |
Method and apparatus for performing channel compensation and symbol demodulation for coherent demodulation in an OFDM system
A method and apparatus for performing channel compensation and symbol demodulation using an estimated channel impulse response during coherent demodulation of a received Orthogonal Frequency...
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7609614 |
Uplink modulation and receiver structures for asymmetric OFDMA systems
The present invention centers upon uplink communication protocols for use primarily with orthogonal frequency division multiple access (OFDMA) communication systems. Aspects of the invention relate...
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7609613 |
Cyclic delay diversity and space coded-hybrid diversity transmitter
A diversity transmitter for use in an OFDM transmission protocol which diversity transmitter comprises:
a diversity generator ( 2 ) for receiving and diversifying OFDM transmit symbols, and...
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7609612 |
Multi-carrier transmitter for ultra-wideband (UWB) systems
System and method for a multi-carrier ultra-wideband (UWB) transmitter. A preferred embodiment comprises an UWB transmitter (for example, transmitter 300 ) taking advantage of both code division...
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7609611 |
Method for transmitting an offset modulated biorthogonal multicarrier signal (BFDM/OM)
The invention concerns a method for transmitting a biorthogonal multicarrier signal BFDM/OM, using a transmultiplexer structure providing: a modulating step, using a synthesis filter bank ( 11 ),...
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7606165 |
What-if analysis for network diagnostics
A network troubleshooting framework is described. In an implementation, a method includes generating a first estimation of network performance by a simulator based on network settings obtained from...
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7606139 |
Preamble detection using frequency based correlation
A method for detecting a preamble location in a multiple preamble OFDM (Orthogonal Frequency Division Multiplexing) system is disclosed. An OFDM signal is generated with a plurality of frames, and...
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7606138 |
Multi-symbol encapsulated OFDM system
A method and system for communication of information in OFDM format are disclosed. The method employs multi-symbol encapsulation (MSE), wherein multiple OFDM symbols are grouped together in cyclic...
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7606137 |
Cancellation systems for multicarrier transceiver arrays
Frequency-dependent cancellation separates a plurality of interfering signals received by a plurality of receivers. Received wideband single-carrier signals or multicarrier signals are separated...
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7602697 |
Systems and methods for reducing the peak-to-average-power ratio in an OFDM-based system
In an exemplary embodiment, an orthogonal frequency division multiplexing (OFDM) system includes an OFDM transmitter and an OFDM receiver that is configured to receive OFDM signals from the OFDM...
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7602696 |
Adaptive guard intervals in OFDM systems
Dynamic guard interval adaptation is provided for devices having differing delay spreads in an OFDM communication system to reduce the guard intervals, with adaptation controlled by either the...
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7599440 |
Downlink control channel allocation method in mobile communication system
A downlink control channel structure in a CDMA (Code Division Multiple Access) mobile communication system and its operating method are disclosed. Especially, a downlink control channel structure...
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7599344 |
Method and apparatus for reducing multi-user processing in wireless communication systems
A method and apparatus is disclosed for reducing multi-user processing at the receiver in wireless communication systems. Detected codes are grouped according to channel impulse response and a...
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7599282 |
Wide frequency offset correction using encoded interburst phase differences
Systems and methods for wide frequency offset synchronization are provided. A synchronization data sequence is encoded onto a series of OFDM frequency domain bursts as interburst phase differences...
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7599281 |
Low rate MIMO
Data to be transmitted via a MIMO communication system having NT transmission paths is divided into M multiple streams and each stream is transmitted from one of the transmission paths of the MIMO...
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7596167 |
Allocation method, network element, module and user device
The invention is related to a network element, comprising: means for receiving feedback information from the user device; means for creating a first orthogonality measure by using the feedback...
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7596133 |
Apparatus and method for data transmission/reception using channel state information in wireless communication system
Disclosed is a method for transmitting and receiving data according to a channel state in a wireless communication system, the method includes measuring a characteristic of transmission channels...
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7596111 |
Satellite/terrestrial wireless communications systems and methods using disparate channel separation codes
A wireless communications system includes a space-based component (SBC) and an ancillary terrestrial component (ATC) configured to communicate with radioterminals using a common satellite service...
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7596081 |
Method and system for training sequences
Methods and systems for training sequences are provided. In one embodiment, a bi-directional communication system comprises: a multipoint-to-point host unit; and a plurality of remote units...
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7593754 |
Receiving apparatus and receiving method of communication system with multiple antennas
A receiving method and apparatus of an orthogonal frequency division multiplexing access system having multiple antennas that is capable of improving system design and realization of integration...
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7593475 |
Space-time and/or space-frequency block coding using complex signal swapping
A method of space-time and/or space-frequency block encoding begins by receiving at least two complex signals, wherein each of the at least two complex signals includes a real component and an...
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7593317 |
Radio base station apparatus
A transmission weight computing section computes a transmission weight for directional transmission using an OFDM signal. A transmission correcting value memory section stores one correcting value...
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7593316 |
Method for distributing data on an OFDM time-frequency grid, a base transceiver station, a base station controller and a mobile network therefor
The invention concerns a method for distributing data on an OFDM time-frequency grid for data transmission from and to mobile terminals in a mobile network accommodating the use of pilot subgrids...
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7590183 |
Generating signals for transmission of information
A method for generating a signal is presented. The method includes selecting a first set of carrier frequencies that are integral multiples of a first frequency interval, and selecting a second set...
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7590045 |
Apparatus and method for transmitting fast feedback information in a wireless communication system
An apparatus is provided for transmitting uplink fast feedback information in a wireless communication system. In the apparatus, a channel encoder generates uplink fast feedback information to...
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7587212 |
System and method for allocating ranging slots in a broadband wireless access communication system
A method for determining a number of ranging slots by a base station (BS) in a broadband wireless access (BWA) communication system. The method includes counting the number of mobile stations (MSs)...
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7586887 |
Method and apparatus for wide bandwidth mixed-mode wireless communications
A network device for implementing high-rate greenfield transmission in a mixed mode frame structure. The network device is configured to transmit a mixed mode frame on two adjacent channels. The...
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7586834 |
Method and apparatus for transmitting uplink acknowledgement information in an OFDMA communication system
A method and apparatus for transmitting uplink acknowledge information (ACK) in a communication system using an orthogonal frequency division multiple access (OFDMA) scheme. The method includes...
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7583766 |
System, and associated method, for utilizing block BLAST with PPIC in a MIMO multicode MC-CDMA system
A method for reducing interference in a MIMO MultiCode MC-CDMA system is disclosed wherein a BLAST algorithm is implemented over one block of correlation reception data y i and estimation channel...
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7583739 |
Channel estimation device, channel estimation method, and wireless receiver
A channel estimation device is provided to achieve high-precision channel estimation in a MIMO or multicarrier wireless receiver. This channel estimation device is used in the wireless receiver...
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7583738 |
Apparatus and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing communication system
Provided is a method for reducing a PAPR (Peak-to-Average Power Ratio) of a transmit signal in a broadband wireless communication. The method includes the steps of: assigning information signals to...
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7583736 |
Radio transmission device, radio reception device, and method for selecting transmission cancellation subcarriers
Of systematic bits (S) and parity bits (P 1 , P 2 ) generated by coding (coding rate R=1/3) transmission bits, subcarriers to which parity bits are mapped are designated as candidates for...
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7583624 |
Method of idle mode control in OFDM system
The present invention discloses a method of idle mode control in an orthogonal frequency-division multiplexing (OFDM) system. By superposing idle mode control channels on a frame synchronization...
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7583583 |
System and method for reducing peak-to-average power ratio in orthogonal frequency division multiplexing signals using reserved spectrum
A method and apparatus for reducing the peak to average power ratio of an OFDM signal. The method involves operating on the signal only after it is converted to the time domain where the signal is...
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7580400 |
Apparatus and method for generating preamble signal for cell identification in an orthogonal frequency division multiplexing system
Disclosed are an apparatus and a method for generating a preamble signal for cell identification in an OFDM mobile communication system. The method includes the steps of generating a Walsh code...
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7580347 |
Synchronization of remote units using multiple adjustments
Systems and methods for course and fine synchronization are provided. In one embodiment, a method comprises establishing communication between a first remote of a plurality of remote units and a...
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7580346 |
Method and apparatus to improve SCDMA headroom
A method of determining when cable modems in a distributed digital data delivery service over cable TV hybrid fiber coaxial cable network have a headroom problem and resolving said problem. The...
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7580345 |
Radio transmitting apparatus and radio transmitting method
A radio transmission apparatus capable of performing communications with high transmission efficiency. In this apparatus, modulator ( 2802 ) modulates data and outputs to spreader ( 2804 )....
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7577216 |
Guard interval and FFT mode detector in DVB-T receiver
For determining FFT and GI (guard interval) modes within a receiver, a correlation signal is generated from an in-phase and quadrature (I/Q) stream. An plurality of GI mode division signals are...
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7577165 |
Method and system of orthogonal signal spectrum overlay (OSSO) for communications
A method and system for increasing the effective communications channel bandwidth beyond that of the constrained physical bandwidth of a given channel by orthogonal signal spectrum overlay (OSSO)...
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7577120 |
Allocation of power and channelization codes for data transfers
A method of communication includes assigning at least one channelization code to a data packet. A portion of power available for communicating is assigned to the channelization code based on a...
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