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6754318 |
Configurable multi-port modem to achieve a high bit rate in a DSL system
A configurable multi-port modem includes a plurality of hybrids, a plurality of receivers, a plurality of transmitters, and a switching module. Each of the plurality of hybrids is operably coupled...
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6754258 |
Systems, methods and computer program products for averaging learned levels in the presence of digital impairments based on patterns
Methods, systems and computer program products for averaging measured levels from differing frame intervals based on a digital impairment pattern associated with the frame intervals are provided....
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6754186 |
DSL active modem detection
A discrete multi-tone communication system having a selected remote end terminal that senses data transmission activity on the discrete multi-tone communication channel. The selected remote end...
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6754187 |
Performance enhancement system for digital PBX
A system for ensuring optimum performance of a modem used in conjunction with a telephone system employing a digital PBX coupled with a two-wire analog trunk includes an echo cancellation circuit...
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6754259 |
Low-cost radio frequency (RF) link for point-to-point data transfer
An apparatus for data transfer using radio frequency (RF) energy, includes a first software application that sources and links the data transfer, a second software application for controlling a...
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6754265 |
VOCODER capable modulator/demodulator
A method and apparatus for data transmission using existing highly compressed telecommunications media, and in particular encoding, transmitting, receiving, and decoding digital data using vocal...
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6747964 |
Method and apparatus for high data rate transmission in a wireless communication system
In a wireless communication system a method for high data rate transmission aggregates information signals processed by at least two modems, wherein the modulated information signals are...
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6744811 |
Bandwidth management for DSL modem pool
A method for managing the bandwidth of a modem pool having at least two co-interfering modems, the method including measuring an SNR margin for at least two of the co-interfering modems, and...
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6744812 |
Dual mode phone line networking modem utilizing conventional telephone wiring
A networking modem capable of full duplex communication over a telephone line is adapted for use as a component of a computer system. The modem comprises a digital signal processor (DSP) capable of...
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6741599 |
Telephone switch-integrated modem pool and broadband access concentrator providing improved local loop data network access
A telephone switch-integrated modem pool and broadband access concentrator provide improved data network access through a PSTN local loop. Rather than simply cascading data as TDM traffic through...
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6738418 |
Method and apparatus for adaptive data allocation in a multi-carrier communication system
An xDSL modem having an adaptively adjustable guard band comprising a finite number of spaced-apart frequency bins between the upstream and downstream frequencies. The guard band is adjusted by...
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6735242 |
Time tracking loop for pilot aided direct sequence spread spectrum systems
A novel design of, and method of operation for, a coherent delay lock loop (DLL) for communication systems that employ a pilot channel or pilot symbols is disclosed. Pilot information is used to...
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6735245 |
Activation of multiple XDSL modems with channel probe
Method and apparatus for enabling data communication. The quality of a communication channel is determined using line probing techniques. In addition, capabilities of the communication devices are...
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6731946 |
System and method for timing detector measurements in a wireless communication system
A system that provides a wireless broadband connection between base stations and customer sites is described. The system includes indoor units within the base stations and customer sites and...
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6732323 |
Method of selecting initialization parameters for multi-channel data communication with forward error correction
The present invention includes alternative methods for selecting forward error correction parameters to be used in multi channel communications. Method embodying aspects of the present invention...
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6731678 |
System and method for extending the operating range and/or increasing the bandwidth of a communication link
A system and method for extending the operating range and/or increasing the bandwidth of a communication link. The communication link may consist of any two communication devices that are connected...
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6728309 |
Method and apparatus for high speed data transmission over a four-wire subscriber line
Disclosed is an architecture and method for high speed transmission over a four-wire subscriber line. Each modem in the present invention includes a V.90 transmit section and a V.90 receive...
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6728308 |
Extending symbol rates and symbol rate re-negotiation for facsimile modems
Half-duplex mode in V.34 facsimile modems can be exploited using symbol rate re-negotiation to enhance performance and throughput. The enhancement is useful for facsimile servers and for facsimile...
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6725176 |
Loop diagnostics for ADSL systems
The present invention provides techniques for performing loop diagnostics in DSL communication systems.
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6721354 |
Method of searching the point which is the nearest from a characteristic of a received signal in an assembly of non-uniformly distributed points
The invention proposes an efficient method of determining, in an arbitrary assembly of non-uniformly distributed points, the point which is nearest from a characteristic of a given analog signal....
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6721355 |
Method and apparatus for adaptive power management in a modem
A data traffic predictor for a modem, and a method for power management in a modem, are described. The data traffic predictor includes a data traffic monitor, a periodicity detector and a power...
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6721357 |
Constellation generation and re-evaluation
A method of generating a data constellation at a client modem is provided whereby an optimum distance between data constellation data points may be calculated for a predetermined, acceptable error...
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6721581 |
Reprogrammable digital wireless communication device and method of operating same
A digital wireless communication device comprises a software-programmable processor, a heterogeneous reconfigurable multiprocessing logic circuit, and a bus connecting the software-programmable...
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6721394 |
Method for reducing noise from an asymmetric digital subscriber line modem
A method for reducing audible noise in a telephone from a splitterless asymmetric digital subscriber line modem. The modem examines the shape of the power spectrum of fast retrain signals both when...
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6717983 |
Ultrasonic coding modem for digital network communication
An ultrasonic coding modem for digital network communication comprises a transmitting device having a first piezoelectric substrate, and a receiving device having a second piezoelectric substrate....
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6717982 |
Data communication apparatus
A controller of a data communication apparatus according to the present invention stores information on each successful and unsuccessful data communication, a season, a data of the week, a time,...
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6714588 |
Method and apparatus for interference cancellation in a high speed modem
A method and apparatus for interference cancellation in a high-speed modem that includes a first coupler for receiving a differential signal including a received data signal, a second coupler for...
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6714589 |
Communication device with primitive synchronization signal
A communications system includes a first modem and a second modem. The first modem is adapted to modulate and demodulate data in accordance with a set of operating parameters and transmit a request...
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6711205 |
Tone detector for use in a modem
A tone detector for a modem detects the presence of a tone, such as that sent during a retraining request, using a complex adaptive FIR filter of the form 1−z −1 . The filter will detect the...
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6711138 |
Digital subscriber line/home phoneline network router
A digital subscriber line (DSL)/home phoneline network router provides DSL connectivity and home networking support. The router provides a single phoneline connection (RJ-11 jack) to access either...
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6711207 |
System and method for reduced power consumption in digital subscriber line modems
The present invention is directed to a system and method that detects periods of no activity in the downstream data path of a DSL modem and reduces the transmit power in the output line driver to...
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6711206 |
Modem using a digital signal processor and separate transmit and receive sequencers
A modem uses separate receive and transmit modules. A receive sequencer and a transmit sequencer operate relatively autonomously but share state information with each other using a common data...
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6707822 |
Multi-session asymmetric digital subscriber line buffering and scheduling apparatus and method
A transceiver for an asymmetric communication system is provided that implements a buffering and scheduling scheme that utilizes a virtual clock signal to synchronize processing of asynchronous...
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6704351 |
Method and system for training a modem
A method for training a modem includes selecting a transmission rate from one of a plurality of bauds, each baud identifying at least one transmission rate. The method also includes attempting to...
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6703923 |
Apparatus for providing security on a powerline-modem network
A portable security device ( 10 ) for setting up secure powerline modem networks is disclosed. The portable security device includes a memory ( 18 ) which stores a protocol ( 19 ) for communicating...
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6700928 |
Tetrahedron modem
A tetrahedron modem phase modulates input serial binary data and demodulates input waveforms based on a four dimensional vector set. The phase modulation scheme has four possible state vectors (or...
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6700927 |
Method for establishing and adapting communication link parameters in XDSL transmission systems
A method is disclosed for establishing and adapting communication link parameters in xDSL transmission systems. The method determines a frequency allocation scheme that makes the delivery of both...
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6700936 |
Many-carrier transmission system and a receiver therefor
A digital audio broadcasting (DAB) receiver designed for receiving a signal with 1536 active carriers generated by an inverse fast Fourier transform (FFT) with 2048 points, includes the usual RF...
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6698022 |
Timestamp-based timing recovery for cable modem media access controller
A method for employing timestamps received by a media access controller (MAC) of a cable modem from a cable modem termination system (CMTS) to schedule upstream transmissions of the cable modem. A...
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6697421 |
Operator independent, transparent wireless modem management
An operator independent, transparent wireless modem management system is disclosed. According to an embodiment of the invention, the modem management system comprises the steps of receiving a short...
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6697422 |
Variable encoding levels for encoding in-band control messages in wireless telecommunication systems
An apparatus, method and system provide for variable encoding levels for encoding of in-band control messages in wireless telecommunication systems. In the various embodiments, ANSI-136 handoff and...
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6693957 |
Adaptive front end for discrete multitone modem
An adaptive DMT modem determines, as part of a startup sequence, subscriber loop conditions. One or more loop condition adaptation operations are then performed to reduce the complexity of the...
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6693972 |
Data apparatus for maintaining analog line signal during a data sample underrun condition
A data apparatus (e.g., a modem) continues to generate an analog line signal acceptable to a remote data apparatus' receiver when software fails to deliver samples used to generate the line signal...
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6693998 |
Error correction and compression parameter exchange during modem training phase
The startup, retrain, renegotiation quick connect or other processes of handshaking between communication systems involve the exchange of certain modulation, constellation, precoder, prefilter and...
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6690721 |
Method for asymmetric digital subscriber line modem recovery from insufficient transmit power
A method for recovering from an excessive power cutback in a splitterless asymmetric digital subscriber line modem. The modem may apply a power cutback to enable simultaneous use of the modem and a...
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6690719 |
Host to modem interface
An apparatus for and a method of interfacing a host to a modem. Data is transferred between the host and the modem via a serial interface. The modem provides the physical layer implementation...
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6690720 |
Automated testing of modem training
There is provided a system for testing modem training of a first modem and a second modem. The system includes a line simulator interposed between the first and second modems, and a processor for...
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6690717 |
Multi-tone transceiver system using two steps of DMT-CMFB
A wideband multi-tone transceiver system interoperable with Asymmetric Digital Subscriber Line (ADSL) transceiver system, and including a two-step transceiver system having a discrete multi-tone...
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6690718 |
Asymmetric digital subscriber line transceiver unit-card and method of controlling the same
An asymmetric digital subscriber line transceiver unit-card (ATU-C) and a method of controlling the same. The ATU-C includes: a power supply unit; a plurality of modems to be connected to a...
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6687512 |
Subscriber terminal, base station, circuit mode switching method, and a wireless system utilizing said method
A wireless system that can switch the communication mode based on the type of a signal inputted into the system is provided. The wireless system comprises a subscriber terminal that is connected to...
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