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7567613 |
Test method and apparatus for in-house wiring problems
To test for in-house wiring problems, upstream transmission profiles are tuned automatically and remotely, and reactive downstream parameter modifications indicative for in-house wiring problems...
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7564904 |
Apparatus for and method of detection of powered devices over a network
A novel mechanism for detecting the presence of powered devices over a network. A unique, infinite pseudo-random sequence of pulses are generated and transmitted over the network to the link...
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7564895 |
Method and apparatus for monitoring channel frequency response
Method and apparatus for retrieving the channel frequency response H(f), the noise N(f), measured at initialization and the signal to noise ratio SNR(f) measured at show time on a per bin basis, in...
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7558347 |
Method and device for selecting an antenna for receipt of a multi-carrier signal
A method and device for evaluating a received signa1 in a data-receiving system using multi-carrier modulation are provided. A confidence indicator is determined for each data item received so as...
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7558544 |
Method of executing scanning in broadband wireless access system
The primitives between an upper management layer and the MAC layer within a mobile station and a base station are defined in order to specify and clarify the operations within the protocol stack...
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7558315 |
Adaptive margin and band control in digital subscriber line (DSL) systems
Controlling margins in a DSL modem pair is based on collected operational data. The operational data is analyzed and at least one of the modems in the modem pair is instructed to use a...
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7555037 |
Methods and apparatuses to provide synchronization symbol on demand for DSL systems
A method and apparatus for providing synchronization data on demand are described. The method includes sending one or more synchronization parameters from a receiver to a transmitter in a data...
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7548581 |
At-command analyzing device
An UART receives asynchronous transmission serial data based on a baud-rate clock from a DTE. An MPU analyzes the data received by the UART. A baud-rate generating portion generates the baud-rate...
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7545857 |
Receiver architecture employing low intermediate frequency and complex filtering
A communications receiver architecture characterized by a relatively low intermediate frequency (IF) and a polyphase filter. The receiver includes an input amplifier coupled to a carrier signal....
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7545868 |
High bandwidth data transport system
A method of data transmission provides for representing data using ultra wideband pulses, sending at least one pulse over an electrically conductive guided medium, receiving the at least one pulse...
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7542733 |
Method and apparatus for diversity transmission from a mobile station
A method and system for diversity transmission from a mobile station. Signals sent from a mobile station to a base station may suffer from fading. To combat this, diversity transmission is used to...
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7542514 |
Method and device for adaptive modulation and coding based on second order statistics of channel information
The present invention discloses a method and device for adaptive modulation and coding based on second order statistics of channel information in OFDM system, characterized in that, by means of...
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7539251 |
Communications system with selective baseband pilot injected carrier (BPIC) and input data modulation and related methods
A communications system may include a transmitting device for transmitting a modulated signal therefrom based upon first and second input data. The transmitting device may include a baseband...
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7539252 |
Communications system with baseband pilot injected carrier (BPIC) modulation/demodulation and frame recovery and related methods
A communications system may include a transmitting device for transmitting a modulated signal therefrom based upon input data, and a receiving device for receiving the modulated signal from the...
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7539794 |
PRBS generator selection in modem communication
The present invention relates to a system and method for selecting one of plurality of PRBS generators for use with a modem. The modem includes a measuring device adapted to measure an operating...
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7532667 |
Pilot-directed and pilot/data-directed equalizers
A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap...
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7532666 |
Method and apparatus for error correction in multi-line multi-tone gigabit transmission systems
A multi-tone modem supporting multi-tone modulation protocols over multiple bundled transmission lines. The multi-tone modem is configured to transmit and receive communication channels each...
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7529326 |
Precise frequency estimation of short data bursts
The invention performs frequency estimation over both the burst preamble, during which known symbols are transmitted, and also during the burst's data packet, which is subsequent to the preamble...
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7529289 |
Signal processing under attenuated transmission conditions
Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a...
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7529177 |
Dithering scheme using multiple antennas for OFDM systems
A ground-or roof-top-based repeater in an OFDM system uses multiple transmission antennas to retransmit satellite signals. By using multiple transmission antennas, multiple identical OFDM signals...
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7529293 |
Universal intelligent modem
In one general aspect, data transfer between the modem and a processor connected to the modem may be improved using a variable speed buffer. The variable speed buffer may include one or more...
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7529303 |
Methods and apparatus for determining transmission power levels
Methods and apparatus are provided for determining transmission power levels. The power characteristics of a cable modem family are determined by testing cable modems in a cable modem family with...
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7526321 |
Wireless network apparatus and method of channel allocation for respective radios
A method of channel allocation for respective radios is disclosed. The method begins by scanning within sectors of a phased array for retrieval of BSSIDs belonging to each beam of a particular...
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7522680 |
Apparatus, system, and method for asymmetric maximum likelihood detection
An apparatus, system, and method are disclosed for asymmetric maximum likelihood detection. An initialization module initializes a plurality of branch metrics and a plurality of path memories. A...
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7522515 |
Method and system for providing window shaping for multiline transmission in a communications system
A method and system for providing window shaping for multiline transmission in a communications system are described. A last portion of a prefix symbol is extracted. A prefix with a prefix window...
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7522692 |
Isolator and a modem device using the isolator
A communication system is provided including a transceiver and an application controller to transmit and receive signals through the transceiver. An isolator which insulates and separates the...
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7522514 |
Systems and methods for high rate OFDM communications
Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the...
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7522672 |
Digital branch calibrator for an RF transmitter
The present invention provides a digital (computational) branch calibrator which uses a feedback signal sensed from an RF transmit signal path following the combining stage of LINC circuitry of a...
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7519110 |
System and method for improving DSL performance
A system and method is described for determining a condition of a communication line, such as the absence of a filter device on a digital subscriber line (DSL). A first signal characterized by a...
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7519109 |
Process for configuring an xDSL modem and xDSL modem having such a process
Process for configuring an xDSL-type symmetric modem, comprising the following: detecting a predetermined criterion corresponding to an asymmetric operating mode, in particular an ADSL-type; and in...
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7519132 |
Reduced complexity multicarrier precoder
A reduced complexity precoder provides an efficient method and structure to precode a vector-signal-point sequence for transmission through a band-limited channel. The precoder enables a...
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7519124 |
Method for seamless bit rate adaptation for multicarrier DSL
A method of mitigating transmission delay fluctuations in a communication system having a variable data rate and block-oriented subsystems, such as interleavers. The method comprises interspersing...
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7515641 |
Apparatus and method for processing ranging channel in orthogonal frequency division multiple access system
Disclosed is an apparatus and method for processing a ranging channel in an OFDMA system. The apparatus converts received ranging complex signals to polar coordinate signals having a signal...
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7512077 |
Compensation for independent clocks in relayed communication over packet-based networks
Methods, apparatuses, and systems are presented for compensating for independent clocks in relayed modem communications involving receiving data packets from a first network device, forwarded over...
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7512176 |
Flexible upstream resource sharing in cable modem system
A cable modem termination system may include a number of receivers and a number of input ports configured to receive bursts of data from a number of cable modems on a number of channels. At least...
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7512149 |
Bit and power allocation scheme for full-duplex transmission with echo cancellation in multicarrier-based modems
The present invention provides a method, data modulator, modem, computer readable medium and system for allocating bits to sub-carriers of data channel frequencies for spectrally efficient...
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7512175 |
Method for synchronizing exporter and exciter clocks
A method for synchronizing an exciter clock with a modem frame clock in a broadcasting system comprises the steps of receiving a plurality of modem frame pulses that are representative of the start...
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7508860 |
Pulse signal generator for ultra-wideband radio transception and radio transceiver having the same
Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of...
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7508876 |
Fast initialization using seamless rate adaptation
A method for initializing modems in a multicarrier transmission system to establish a communication link between the transmitter and the receiver. An exemplary embodiment includes the steps of...
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7508867 |
Activation of multiple xDSL modems with implicit channel probe
A communication apparatus and a communication device that are selectively connectable to each other. A transmitter, associated with one of the communication apparatus and the communication device,...
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7505480 |
System and method for transporting a compressed video and data bit stream over a communication channel
Digitally compressed video/audio bit streams, when transmitted over digital communication channels such as digital subscriber loop (DSL) access networks, ATM networks, satellite, or wireless...
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7505396 |
Method and apparatus for establishing interleaver synchronization in an orthogonal frequency division multiplexing (OFDM) communication system
Interleaving methods and apparatus are disclosed for an in-band on-channel digital audio broadcasting system. The guard periods that separate any two adjacent symbols in a conventional OFDM system...
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7505540 |
Clock recovery method for bursty communications
Clock recovery method for bursty communications. A method is disclosed for recovering the clock from a received data stream that comprising bursts of data with zones of substantially no data...
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7502409 |
Mobile broadband modem and related access sharing technique
An exemplary mobile broadband modem for network access comprises a processor coupled to an I/O interface capable of being communicably coupled to a plurality of computers, a transceiver coupled to...
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7499488 |
Impulse noise detection from preamble symbols
A communication device constructed according to the present invention detects impulse noise in a preamble sequence. In detecting impulse noise in the preamble sequence the communication device...
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7499487 |
System and method to mitigate interference in DSL systems
Systems and methods are disclosed for determining mitigating noise in multi-pair communication system. A receiver coordinated system can include an error estimator that estimates noise for a first...
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7496134 |
Computationally and memory efficient tone ordering scheme
An integrated circuit 18 is provided that includes a memory 32 and a memory modification component 33. The memory 32 maintains a bits count, a gain, and a tone order for each of a plurality...
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7496135 |
System and method for selectable mask for LDSL
The present invention overcomes various problems by defining two upstream masks (U 1 , U 2 ) and two downstream masks (D 1 , D 2 ) and using a mask selectable system for the long reach digital...
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7496144 |
Allocating data between tones in a VDSL system
A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are associated into groups 10, 11, and tone ordering, gain selection, and/or bit...
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7490345 |
Upstream only linecard with front end multiplexer for CMTS
One or more upstream line cards each include a digital or analog multiplexer front end circuit for a Cable Modem Termination System. Each upstream line card has only upstream receivers and allows a...
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