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6823002 |
Linear block interleaver for discrete multi-tone modulation
A discrete multi-tone (DMT) digital subscriber line (DSL) communication device employs a linear block interleaver for mathematically combining multiple tones into n-tone combinations in order to...
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6823483 |
Physical coding sublayer for a multi-pair gigabit transceiver
A physical coding sublayer (PCS) transmitter circuit generates encoded symbols based on a transmission standard. For example, in one embodiment, the transmission standard may be based on the 1000...
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6823024 |
Compensation circuit and method for compensating for an offset
To demodulate a frequency-modulated signal having an offset, two time constants are provided in a filter unit. The filter unit has two analog or digital low-pass filters or high-pass filters. A...
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6823001 |
Dual stage communication processor
A communications processor is presented that is capable of receiving a potentially degraded data transmission signals operating at high transmission rates and generating an improved data...
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6823003 |
Multi-path transceiver amplification apparatus, method and system
A multi-path transceiver apparatus, method and system for implementation in a bidirectional antenna path by which a transceiver output signal is provided with a path independent from a separate...
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6813326 |
Data transmission system, data transmission communication station, and data transmission method
A data transmission system for transmitting data from a transmitter to a receiver located away therefrom. The transmitter includes circuitry for transmitting together a main signal having a carrier...
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6813324 |
Synchronized communication system
A synchronized communication system for communicating signals into and from a medium is disclosed. The communication system utilizes a transmitter located at a central station external to the...
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6813311 |
Non-linear echo cancellation for wireless modems and the like
The present invention, generally speaking, provides for cancellation of non-linear distortions within the echo path of a communications system by characterizing the nonlinearity, performing digital...
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6810076 |
Efficient echo canceller for ADSL applications
Architecture of an efficient adaptive digital echo canceller includes a frequency domain update block, a far-end signal estimation block and a time domain echo cancellation block. The echo...
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6807227 |
Method of reconfiguration of radio parameters for power-aware and adaptive communications
The invention monitors a communication channel and estimates its characteristics from time to time, thus providing a dynamic estimate of channel characteristics. Based on the channel...
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6807225 |
Circuit and method for self trimming frequency acquisition
A circuit and method is disclosed for self trimming in frequency acquisition and clock recovery. The circuit can be simplified as having a VCO in communication with three loops including a trimming...
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6804267 |
Transceiver training for DSL modems under TCM-ISDN interference
Transceiver training is optimized for xDSL modems operating in TCM-ISDN environments under NEXT and FEXT interference. Current ITU-T draft recommendations provide for dual bitmaps that are switched...
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6801570 |
Intelligent rate option determination method applied to ADSL transceiver
A system and method that generates rate options for ADSL transceivers is described. The system and method dedicates discrete multitone symbol bandwidth to bearer channels based on a prioritization...
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6798829 |
Transmitting apparatus and transmitting method, receiving apparatus and receiving method, and distribution medium
Upon reception of the group ID and sound volume control signal, a selecting means refers to a control group ID management memory to determined whether the part being supplied belongs to the...
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6798827 |
System and method for correcting offsets in an analog receiver front end
A method corrects an input DC offset signal generated in front-end analog signal processing circuitry in a transceiver capable of operating in a high frequency local area network. An output signal...
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6798828 |
Full duplex gigabit-rate transceiver front-end and method operation
A method for equalizing a signal in a transceiver includes receiving an analog signal and adaptively equalizing the analog signal in an adaptive equalization filter to produce an analog filtered...
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6795691 |
Variable-power transceiving device
The invention relates to a transmission or transmission/reception device having a transmission path structure which makes it possible to increase the range of variation of the transmission power...
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6795494 |
Receiver architecture using mixed analog and digital signal processing and method of operation
There is disclosed a transceiver for use in a high speed Ethernet local area network (LAN). The transceiver comprises: 1) front-end analog signal processing circuitry comprising: a) a line driver...
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6795693 |
Method for controlling the transmitter part of a radio transceiver and a corresponding radio transceiver
The invention relates notably to a method for controlling the transmitter part of a radio transceiver, the transmitter part comprising an IQ modulator, the radio receiver further comprising a...
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6795495 |
Line driver with output impedance synthesis
A driver for coupling a transceiver to a line, including a first amplifier having first and second inputs and a first output coupled to a first side of the line. The driver includes a second...
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6792039 |
Method for controlled reducing of processor utilization by a soft modem and a soft modem with controlled different processor utilization modes
A soft modem having a plurality of selectable operational modes. Each of the operational modes has a different nominal processor utilization level. The soft modem uses a method for changing its...
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6792049 |
Digital transceiver system with adaptive channel pre-coding in an asymmetrical communications network
A digital transceiver system includes a downlink channel and an uplink channel. In the system, a transmitter transmits signals on the downlink channel and receives signals on the uplink channel....
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6788738 |
Filter accelerator for a digital signal processor
A method and apparatus to accelerate the evaluation of complex, computationally intense digital signal processing algorithms is disclosed. In one embodiment, a filter accelerator is connected in...
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6788743 |
Modulation of a primary data channel reference clock to form a separate data communication channel
The amount of data transmitted in a primary data channel is increased by modulating a reference clock signal of the primary data channel with secondary data to form a separate secondary data...
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6785324 |
Transceiver including reactive termination for enhanced cross-modulation performance and related methods
A full-duplex radio transceiver includes a transmitter and a receiver. A duplexer is connected to an output of the transmitter and an input of the receiver. The receiver includes a low noise...
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6785265 |
Ethernet-based digital subscriber line methods and systems
A digital subscriber line access network comprises a remote Ethernet device disposed in a serving area interface. The remote Ethernet device serves as an Ethernet bridge for a neighborhood service...
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6778599 |
Digital transceiver with multi-rate processing
A digital data receiver includes a front end, coupled to receive an input signal transmitted over a communication channel, the signal representing a stream of transmitted symbols with a given input...
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6779069 |
Computer system with source-synchronous digital link
Apparatus for a baseband-media interface is described. More particularly, in an embodiment, a baseband processor, a medium access controller and a baseband-media interface are provided with a...
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6775520 |
Synthetic-aperture communications receivers
The relative movement of a receiver and transmitter in a communications system is used to advantage by electronically synthesizing a larger apparent antenna aperture, thereby increasing...
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6775532 |
Communication apparatus with an RF transmission section operated by second and third clock signals
A communication apparatus capable of realizing a reduction in power consumption thereof. At least a wireless unit control command analysis/processing section which is operable at a low-speed clock...
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6768778 |
Optimal complementary punctured convolutional codes
The invention provides optimal complementary punctured convolutional codes for coding information bits in a communication system. In an illustrative embodiment, an optimal pair of complementary...
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6768770 |
Transceiver with bidirectional internal interface lines
A transceiver has bidirectional internal interface lines which can be connected to a baseband circuit. The transceiver is switchable by the baseband circuit between a transmission mode and a...
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6765955 |
Methods, systems and computer program products establishing a communication configuration for a modem connection to compensate for echo noise
Methods, systems and computer program products for configuring a modem communication session when conditions associated with echo noise on a digitally discontinuous channel are detected are...
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6763061 |
Frequency domain technique for narrowband noise cancellation in DMT receivers
The system and method of the preferred embodiments may be directed to improving the signal-to-noise ratio in frequency spectrum regions where narrowband interference may be present. The system and...
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6763062 |
Radio communication system
When the average received signal level falls below a given threshold level, a received level detecting/monitoring section informs a microprocessor of it. The microprocessor then collects...
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6763060 |
Communication system employing a network of power managed transceivers that can generate a clocking signal or enable data bypass of a digital system associated with each transceiver
A communication system is provided for interconnecting a network of digital systems. The communication system includes a communication line and a transceiver placed between the communication line...
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6760300 |
High speed wireless OFDM transceiver modem
An apparatus for receiving and/or transmitting signals using orthogonal frequency division multiplexing, said apparatus being adapted for outputting a first output signal, comprising: a time...
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6760391 |
Method and apparatus for line rate control in a digital communications system
A method and communications device for controlling the line rate used on a communications link. The method includes receiving frames of digital information, computing a measure of the number of...
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6757334 |
Bit rate agile third-generation wireless CDMA, GSM, TDMA and OFDM system
Systems, apparatus, and methods for new generations of wireless systems, including multiple standard, interoperable Third-Generation (3G) and Second-Generation (2G), Spread Spectrum CDMA, WCDMA,...
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6756817 |
Receiver, hybrid circuit, driver circuit, and signal transmission system for bidirectional signal transmission for carrying out such signal transmission in both directions simultaneously
A receiver for bidirectional signal transmission, where signals are sent and received in both directions over a signal transmission line, has a signal line, a first hold capacitor, a signal line...
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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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6754233 |
Method and apparatus for transmitting data between a central site and multiple data subscribers
A communication system for transmitting voice and data information is disclosed. The communication system includes subscriber modems, system converters and at least one system data pump. The system...
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6748232 |
Apparatus and method for power control in a radio communication system
An apparatus and method for power control in a CDMA system for radio communication between a first station and a second station. At the first station an indication of the received power of signals...
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6748016 |
System and method for transmitting messages between transceivers using electromagnetically coupled signals
A communication system and method for communicating over a wire in a group of wires are described. The communication system includes a first transceiver connected to a first wire in the group of...
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6745010 |
Wireless, frequency-agile spread spectrum ground link-based aircraft data communication system with wireless unit in communication therewith
A system and method provides a retrievable record of the flight performance of the aircraft and includes a ground data link unit that obtains flight performance data representative of aircraft...
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6741640 |
System and method for measuring the return loss of an antenna
There is disclosed a system for determining the impedance match of an antenna, for use in an RF transceiver comprising an RF transmit path comprising circuitry capable of amplifying an RF signal...
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6738416 |
Device for signal transmission between moving parts
Devices consisting of a signal source and a signal sink connected by a transmission channel for transmitting high-frequency signals, as well as digital signals between moving parts. By eliminating...
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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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6738420 |
Digital filter having an upsampler operational at a fractional clock rate
A digital filter includes a number of coefficient generators that are clocked by a clock having a frequency including an undesired component. The coefficient generators, which each have a number of...
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6738415 |
Bi-directional communication system
A bi-directional communication system and transceiver configuration are described, which employ a bi-directional reference to account for both common-mode and differential noise introduced at...
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