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7277477 |
Zero overhead back channel for adaptive transmit filter updates in SerDes transceivers
A method and system that communicates adaptive transmit-side filter updates between a receiver and transmitter inserts additional versions of control codes into a back channel for encoding updates....
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7272190 |
Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system
In a multi-carrier communication system employing adaptive modulation and coding, a receiver feeds back channel quality information for a “binned” group of subcarriers instead of sending an...
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7272108 |
Channel estimation in orthogonal frequency-division multiplexing (OFDM) systems
A system and method for estimating channel characteristics in orthogonal frequency-division multiplexing (OFDM) systems with transmitter diversity is presented. The disclosed approach is compatible...
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7272109 |
Modified OFDM subcarrier profile
A 10 MHz channelized orthogonal frequency division multiplexing (OFDM) transmitter is provided that communicates using a modified OFDM packet structure with a half-rate oscillator having standard...
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7269187 |
Packet detection system and method
A packet detection technique is disclosed in which an average correlation signal is generated representative of the match between a repetitive sequence of symbols; an average power signal is...
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7269125 |
Method and apparatus for timing recovery in an OFDM system
A method ( 500 ) for timing recovery in an orthogonal frequency division multiplexing (OFDM) system includes the steps of detecting ( 502 ) a lack of a synchronization symbol and determining ( 504...
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7269224 |
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output (MIMO) communications systems are provided. One such embodiment...
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7269126 |
Method for code division multiple access communication with increased capacity through self-noise reduction
A method for constructing orthogonal codes of length N for use in a network utilizing quasi-synchronous code division multiple access combined with time division duplexing. The method determines...
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7263130 |
Method and apparatus for evaluating error control parameters of self-similar constellations
A method and apparatus implementing the method, of selecting a bit load b for a channel in a carrier system. The carrier system encodes data based on a constellation of points. Each point...
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7263088 |
Signalling scheme for high speed downlink packet access
A method of signalling in a mobile communications network ( 2 ) from a base station ( 10 ) to a mobile station ( 12, 14, 16 ) using Hybrid Automatic Repetition Request (HARQ), the method comprising...
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7263058 |
Apparatus and method for generating preamble sequence in a BWA communication system using OFDM
A preamble sequence generating apparatus and method in a BWA communication system using OFDM. An ARM code generator generates at least one ARM code of a different length. A sub-carrier selection...
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7263133 |
MIMO-based multiuser OFDM multiband for ultra wideband communications
A MIMO-based multiuser OFDM multiband of UWB communications is presented to meet FCC emission limitations for indoor UWB operations. The present UWB system divides a single UWB frequency band of...
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7260055 |
Method for reducing channel estimation error in an OFDM system
A method for channel response estimation for an OFDM communication system based on a certain normal training symbols plus one virtual training symbol begins with receiving at least one preamble...
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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...
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7257078 |
Multiple antenna OFDM transceiver and method for transceiving
An RF receiver includes a plurality of OFDM modules. The OFDM modules include receiver antennas for substantially simultaneously receiving a plurality of transmission signals transmitted via a...
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7257410 |
Method for configuring and allocating forward channel in orthogonal frequency division multiple access frequency division duplex system
Disclosed is a forward channel configuring method in an OFDMA FDD system. The method comprises: classifying the cells into a specific number of patterns based on location relations of the...
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7248559 |
Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each...
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7245879 |
Apparatus and associated methods to perform intelligent transmit power control with subcarrier puncturing
An apparatus and associated methods to perform intelligent transmit power control with subcarrier puncturing in a multicarrier wireless communication channel is generally disclosed.
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7242663 |
Multi-channel spread spectrum communications system
A multi-channel spread spectrum communications system utilizes the combination of spreading codes to represent and transfer information. On the transmitter side, every block of data bits is divided...
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7236747 |
Increasing OFDM transmit power via reduction in pilot tone
Transmitting an ultra wideband (UWB) signal in some embodiments comprises reducing power within a first sub-band with respect to a nominal power of the UWB signal within the first sub-band and...
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7236451 |
Dynamic time metered delivery
Dynamic Time Metered Delivery (DTMD) is a unique physical layer communication Method. DTMD uses enhanced time-based techniques to enable and control the flow of more data/Hertz through a variety of...
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7230911 |
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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7230909 |
Efficient activity resumption in point to multipoint service flow
Orthogonal frequency division multiplexing (OFDM) is used to divide a single TDMA time slot into multiple non-contending access request opportunities that are reserved for particular subscriber...
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7230908 |
Dynamic link assignment in a communication system
An architecture for the dynamic assignment of links in a multi-user communication system. A plurality of information channels are provided in a forward communication link of the communication...
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7230910 |
Optimal channel sounding system
A channel sounding system employs orthogonal sequences to meet the Cramer-Rao bound in estimating the channel and achieves considerable simplification of the structure necessary to perform the...
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7227835 |
Method and apparatus for adjacent channel interference reduction in an orthogonal frequency division multiplexing (OFDM) receiver
The disclosed embodiments relate to reducing adjacent channel interference in an OFDM receiver. An error metric is monitored and the carrier frequency of the desired channel is slowly adjusted in...
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7227885 |
Correlation method in a communication system and apparatus
A receiver receives elements of a signal sequence. A state generator generates a sequence of addresses to translate between a pseudonoise sequence and a Walsh sequence. A storage medium, coupled to...
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7227834 |
Synchronizing pulse generating method and method of receiving OFDM signal
In an OFDM receiver, a synchronisation pulse for defining a Fast Fourier Transform window is generated by examining the output of a correlator to find a sub-interval within which there is maximum...
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7221645 |
Pilot pattern design for a STTD scheme in an OFDM system
The present invention relates to a transmitting device and a receiving device in a wireless orthogonal frequency division multiplex (OFDM) communication system with space time transmit diversity...
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7218691 |
Method and apparatus for estimation of orthogonal frequency division multiplexing symbol timing and carrier frequency offset
A system and method estimates symbol timing of long training symbols and coarse carrier frequency offset in an orthogonal frequency division multiplexing receiver of a wireless local area network....
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7218948 |
Method of transmitting pilot tones in a multi-sector cell, including null pilot tones, for generating channel quality indicators
Pilot signal transmission sequences and methods for use in a multi-sector cell. Pilots in different sectors are transmitted at different known power levels. In adjacent sectors a pilot is...
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7218642 |
Methods and systems for high speed broadband digital link
Provided herein are methods and systems for a digital subscriber line protocol that does not require amplitude modulation, as well as methods and systems for such a protocol that can be used in...
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7218617 |
Transmission method of downlink pilot channel in CDMA mobile communication system, and CDMA mobile communication system
A pilot channel transmission method is provided of transmitting a pilot channel through a downlink from a base station in a CDMA mobile communication system including base stations. Each base...
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7215635 |
Apparatus for transmitting and receiving signal using orthogonal codes and non-binary values in CDMA/OFDM system and method thereof
An apparatus for transmitting and receiving a signal in Code Division Multiple Access/Orthogonal Frequency Division Multiplexing (CDMA/OFDM) system is provided. The apparatus discriminates user...
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7215935 |
Segmented CDMA searching
Techniques for segmented CDMA searching are disclosed. In one aspect, a searcher comprises a plurality of storage elements selectable for performing a plurality of segmentable search tasks, each...
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7215636 |
Method of determining training signal in OFDM, and apparatus and method for receiving OFDM signal using the training signal
A method of determining a training signal so as to facilitate acquisition of symbol sync, frequency offset estimation, and channel estimation in an orthogonal frequency division multiplexing (OFDM)...
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7215927 |
Radio communication apparatus and radio transmission method
In order to improve system throughput in a radio transmitting apparatus of a multicarrier system in which transmission is performed simultaneously to a plurality of receiving stations using...
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7212542 |
Method and apparatus for maximizing a data rate of a wireless data communication system
A first transceiver ( 200 ) sends ( 102 ) a predetermined number of blocks of data to a second transceiver, and records ( 104 ) on which of a plurality of sub-carriers each of the blocks of data is...
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7209460 |
Apparatus and method for assigning subcarrier in OFDMA communication system
A subcarrier assignment apparatus and a subcarrier assignment method, in which each of a plurality of Base Stations (BSs) constituting an Orthogonal Frequency Division Multiple Access (OFDMA)...
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7206365 |
Decision sequence generating method and associated receiver with a decision feedback equalizer
A decision sequence generating method and an associated receiver with a decision feedback equalizer (DFE) are provided. The receiver can mitigate multi-path distortion generated when data is...
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7206278 |
Method and system for increasing the total amount of useful information (throughput) transmitted in a radiocommunication system
A method, system, and device are provided for increasing the total amount of useful information transmitted in a radio communication system. The method includes receiving a selection signal with...
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7206350 |
OFDM multiple sub-channel communication system
A transmitter and corresponding method for transmitting an OFDM signal in a communications channel, including a plurality of base-band OFDM modulators, each for modulating a respective data signal...
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7206279 |
OFDM receiving apparatus and method of demodulation in OFDM receiving apparatus
An apparatus for receiving an OFDM modulated signal includes: an A/D converter converting the received signal to a digital signal; a quadrature demodulator performing quadrature detection of the...
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7203158 |
OFDM signal transmission system, portable terminal, and e-commerce system
The present invention realizes electronic commerce by providing a reception section that receives product information and service information and a barcode formation section that forms a barcode...
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7197065 |
Region searcher and method of driving the same and code searcher using the same
A region searcher, a method of driving the same, and a code searcher using the same are disclosed. When a predetermined region is iteratively searched, the energy value corresponding to the same...
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7197007 |
Method for generating 2D OVSF codes in multicarrier DS-CDMA systems
A code tree of two-dimensional orthogonal variable spreading factor (2D-OVSF) code matrices for a multicarrier direct-sequence code-division multiple-access (MC-DS/CDMA) communications system is...
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7191207 |
Apparatus and method to dynamically allocate bandwidth in a data storage and retrieval system
An apparatus and a method to allocate device adapter bandwidth, where that device adapter is disposed in an information storage and retrieval system capable of communicating with one or more host...
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7187647 |
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...
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7184485 |
Time-domain windowing of multi-band OFDM system to enable spectral sculpting
A method of wirelessly communicating is disclosed. The method comprises generating a plurality of tones for a wideband orthogonal frequency division multiplex symbol ( 310 ), the tones including a...
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7184426 |
Method and apparatus for burst pilot for a time division multiplex system
In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data...
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