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7400651 |
Device and method for interpolating frequency components of signal
A frequency interpolation apparatus is provided which reproduces a signal similar to an original signal by approximately recovering suppressed frequency components, from an input signal having the...
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7397758 |
Channel tracking in a OFDM wireless receiver
An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having...
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7394876 |
Enhanced channel estimator, method of enhanced channel estimating and an OFDM receiver employing the same
The present invention provides an enhanced channel estimator for use with an orthogonal frequency division multiplex (OFDM) receiver employing scattered pilot channel estimates. In one embodiment,...
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7391764 |
Method and system for combining symmetric DSL signals and voice signals
This invention provides a simplified communication system that transmits voice and SDSL signals between customer premise equipment (“CPE”) on a single twisted-pair line. The system preferably...
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7391750 |
System and method for dynamically allocating resources in a mobile communication system employing orthogonal frequency division multiple access
Dynamically allocating a frame cell (FC)/subchannel in a mobile communication system by an access point that receives channel quality information (CQIs) fed back from access terminals, determines a...
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7389104 |
Methods, systems and apparatus for providing urgent public information
Embodiments of the invention provide systems and methods for distributing urgent public information. For example, one exemplary of the invention provides a method for providing an alert to a...
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7388885 |
Splitter circuit
A splitter circuit ( 19 ) serves to combine on the transmission side signals which are to be transmitted in different frequency bands (A-C), as well as to separate on the reception side these...
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7386005 |
Method and system for high-speed software reconfigurable code division multiple access communication
A communication device for W-CDMA signal transmission and reception has a W-CDMA transmitter having at least one of a first RAM and first registers, wherein the transmitter is configured to operate...
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7379477 |
Apparatus and method for efficiently transmitting broadcasting channel utilizing cyclic delay diversity
Disclosed are an apparatus and a method for efficiently transmitting a broadcasting channel by means of cyclic delay diversity in an OFDM mobile communication system. The method comprises the steps...
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7372872 |
System and method for monitoring upstream and downstream transmissions in cable modern system
A network monitor includes means for monitoring downstream traffic from a cable modem termination system (CMTS) to a cable modem (CM), means for monitoring upstream traffic from the CM to the CMTS,...
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7366202 |
System and method for interference mitigation for wireless communication
Disclosed are systems and methods which provide interference mitigation by making alternative resources available within areas served by wireless communication links. Embodiments provide multiple...
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7359428 |
VDSL transmission employing multi-code multi carrier CDMA modulation
An improved transmission method for high-rate digital communication on unshielded twisted copper pairs for Very-High Speed Digital Subscriber Loop (VDSL) modems. The new modulation scheme is a...
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7355959 |
Interference suppression for OFDM-based UWB communication
A method suppresses interference in a time-frequency hopped, ultra wide bandwidth system. Signals corresponding to a transmitted symbol are received. The received signals are frequency demodulated,...
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7355960 |
Channel estimation apparatus and method for adaptive channel allocation in an orthogonal frequency division multiple access system
A method and apparatus for defining at least one subcarrier as a subchannel, dividing a total frequency band into a plurality of subchannels, and allocating the subchannels to at least one mobile...
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7355962 |
Multi-carrier communications with group-based subcarrier allocation
A method and apparatus for subcarrier selection for systems is described. In one embodiment, a method for subcarrier selection for a system employing orthogonal frequency division multiple access...
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7352991 |
Satellite signal distribution systems
Various configurations and equipment are described for providing satellite television programming from multiple satellite antennas to receivers, particularly to receivers located in apartments...
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7352775 |
Partial duplex frequency domain modulator system and method
In a multi-carrier transmission scheme (frequency domain multiplexed—FDM), a single high rate data stream is split into multiple lower rate data streams each transmitted over a different carrier...
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7352691 |
Double difference phase detection
A method that allows a digital communications system to detect the presence of transmitted messages in noisy environments. The system includes an OFDM transmitter and an OFDM receiver. The OFDM...
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7349439 |
Ultra-wideband communication systems and methods
Systems and methods of ultra-wideband communication are provided. In one ultra-wideband communication method, a communication channel is divided into a plurality of non-overlapping sub-channels by...
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7339881 |
Method and apparatus for encoding compressible data for transmission over variable quality communication channel
A multi-carrier communication system ( 400 ) groups subchannels ( 802 ) into different quality-of-signal (QoS) regions ( 804 ). An unconstrained optimization process ( 1200 ) is performed...
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7340457 |
Apparatus and method to facilitate the customization of television content with supplemental data
An apparatus and method for customizing television content uses an application ( 70 ) operating on a computing platform ( 12 ) associated with a display device ( 40 ). The platform ( 12 ) accesses...
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7340171 |
FTTH system for broadcast/communication convergence using IEEE 1394
A broadcast/communication convergence system, and an FTTH (Fiber To The Home) system that can accommodate broadcast signals of various channels and variable band signals by converging broadcast and...
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7339955 |
TDMA communication method and apparatus using cyclic spreading codes
Systems and methods of ultra-wideband communication are provided. In one embodiment, an ultra-wideband communication system divides a stream of data conveying symbols into a plurality of unspread...
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7336680 |
Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service
An architecture for providing high-speed access over frequency-division multiplexed (FDM) channels allows transmission of ethernet frames and/or other data across a cable transmission network or...
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7321601 |
Method and apparatus for data transfer using a time division multiple frequency scheme supplemented with polarity modulation
A method of data transmission according to one embodiment of the invention includes encoding a set of data values to produce a corresponding series of ordered n-tuples. The method also includes...
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7319870 |
Method for subscribing to a wireless service
A method is provided for configuring a subscriber unit for operation in a wireless communications system. Information on available wireless services is advertised through well known, and publicly...
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7319690 |
Communication signal equalization systems and methods
Communication signal equalization methods and systems are disclosed. A CDMA signal having a data portion and a known portion including a known or repeated data sequence and received over a...
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7310318 |
Method and system for using optical phase conjugation in an optical communications network
A optical communications network including at least one optical phase conjugator for compensating for non-linear effects. The optical communications network includes at least one dispersion...
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7310302 |
Method for estimating time and frequency offset in an OFDM system
A synchronization technique computes, in the frequency domain, a differential-in-frequency function across a large number of OFDM tones, to develop robust estimates of time and frequency offset....
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7310301 |
Multi-carrier modulation with source information allocated over variable quality communication channel
A multi-carrier communication system ( 400 ) groups subchannels ( 802 ) into different quality-of-signal (QoS) regions ( 804 ). An unconstrained optimization process ( 1200 ) is performed...
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7304977 |
Implementation for a 5 sample guard interval for multi-band OFDM
A sequence of data samples and a sequence of non-data samples are provided. Four input samples from one of the data samples and the non-data samples are selected based on a clock signal. At least a...
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7298290 |
DSRC controller and a method therefor
In a DSRC communications controller equipped with a plurality of reception means for DSRC communications according to the invention, a reception reservation storage section 104 comprises means...
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7280465 |
Frequency assignment in orthogonal multicarrier modulation
A method for transmitting data between two nodes of an orthogonal frequency-division multiplexing network, including assigning to each node at least one transmit frequency set and one receive...
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7277512 |
Systems and methods for accounting for intercarrier interference in transmission systems
A device that transmits data using discrete multitone modulation includes a memory that stores intercarrier interference (ICI) information for each of the tones used to transmit data. The device...
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7277457 |
Sync bursts for frequency offset compensation
A method ( 500 ) and system for compensation of frequency offset between a first transceiver ( 102 ) and a second transceiver ( 104 ) in wireless communication are disclosed. The compensation of...
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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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7269188 |
Simultaneous voice and data modem
Simultaneous transmission of voice and data over the voice channel of a wireless communications network, such as a “cell phone” network, is reconfigurable on the fly among multiple operating...
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7263713 |
Television signal distributor apparatus, receiver apparatus, television signal transmission system and method
In a television signal transmission system, CS broadcasting signals received via a master antenna are converted into intermediate frequency signals in an LNB (Low Noise Block Down Converter). The...
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7260152 |
Method and device for injecting a noise signal into a paired wire communication link
The present invention relates to a device and method for injecting a noise signal into a wire pair of a communication link. In operation a differential mode noise signal is received at a first and...
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7260366 |
Apparatus and method for transmitting and receiving data using an antenna array in a mobile communication system
A data transmitting/receiving apparatus and method using an antenna array in a mobile communication system. A Node B measures a transmission status of each transmission antenna, classifies...
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7260116 |
Bandwidth allocation method in point-to-multipoint communication system
A bandwidth allocation method used in a point-to-multipoint communication system, for efficiently using the bandwidth while shortening delay time. A central unit quantizes round-trip propagation...
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7239650 |
Apparatus and method for receiving upstream data transmissions from multiple remote transmitters
A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit...
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7215726 |
Method for interference suppression for TDMA -and/or FDMA transmission
A method for interference suppression for TDMA and/or FDMA transmission, which at least approximately can be described as pulse amplitude modulation, with an arbitrary number of receive antennas....
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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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7203156 |
Communication system, base station apparatus, communication terminal apparatus and communication method
In carrying out bidirectional communication with a base station device, one frame is prescribed for each predetermined time period Tf and a plurality of time slots are formed in one frame. In slots...
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7200156 |
Modular broadband adapter system
A system which allows modular expansion to provide additional services to high speed data. A high speed data line such as DSL or cable is input to a broadband expandable modem device. The modem...
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7197081 |
System and method for receiving OFDM signal
A system for receiving an OFDM signal. An AD converter samples a received signal at a first sampling rate. A low pass filter removes noise from a signal outputted from the AD converter. A rate...
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7194009 |
Full-service broadband cable modem system
A method and system are disclosed for enabling full-service communications between a full-service cable modem termination system (fsCMTS) and a plurality of full-service cable modems (fsCMs) for a...
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7190683 |
Two-dimensional channel bonding in a hybrid CDMA/FDMA fixed wireless access system to provide finely variable rate channels
A communications system employs the use of both synchronous CDMA and FDMA to provide a variable bandwidth waveform with multiple bonded transmitters and receivers that are agile in both frequency...
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7187646 |
Link quality determination of a transmission link in an OFDM transmission system
The present invention relates to a link quality determination unit (LQ-DET) for determining a link quality (LQ) of a transmission link (TL) between an OFDM transmitter (TR) and an OFDM receiver...
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