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7636374 Hardware apparatus for conditioning pilot symbols for channel estimation using adaptive low-pass filtering  
A hardware apparatus ( 10 ) for conditioning pilot symbols for channel estimation in a mobile radio comprises a time-division multiplexed low-pass filter unit for filtering the received pilot...
7634023 Orthogonal frequency digital multiplexing correlation canceller  
A correlation canceller modulates a communication signal over a plurality of channels and an epoch aperture by a plurality of interference response signals corresponding to linear response by one...
7596626 Method and computer system for triggering an action on digital communication data  
The invention concerns a digital processing system fed by at least one filter having three possible states resulting from one or more conditions on one or more protocol attributes, specified for a...
7519068 System for embodying protocol in gateway GPRS supporting node and method thereof  
Disclosed is a protocol embodying system and method in the GGSN. An IP layer is provided between the GPRS network and the PDN and performs routing between the two networks, and performs routing...
7487254 Fixed length filtering to filter clusters of discrete segments of data  
Methods and systems are provided for filtering digital data formatted in packets. A filter module contains a plurality of filters and is coupled to a filter mapping module. The filter mapping...
7450615 Apparatus and method for automatically bypassing a load coil in a digital subscriber line circuit  
An apparatus and method are provided for bypassing a load coil in a Digital Subscriber Line (DSL) circuit. An interface is provided for making a connection with the DSL circuit and receiving a...
7426242 Orthogonal frequency digital multiplexing correlation canceller  
A correlation canceller modulates a communication signal over a plurality of channels and an epoch aperture by a plurality of interference response signals corresponding to linear response by one...
7415086 Multi-channel communication system for multiple input, multiple output processing of an encoded signal  
A method and apparatus is disclosed for processing two or more encoded signals received over a multi-channel communication system to cancel or mitigate coupling and the effects of the channel on...
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...
7376154 Non-intrusive method for routing policy discovery  
Discovering routing policies in information networks. Large networks such as Autonomous Systems are abstracted as a single network element. A plurality of taps on the borders of the abstracted...
7369487 Clustered OFDM with channel estimation  
An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is...
7370247 Dynamic offset compensation based on false transitions  
A method and apparatus provide a receiver with an architecture to regulate a bit error rate of the receiver using an offset based on detecting false transitions in received data. In an embodiment,...
7356586 Filtering system and method for voice protocol network analysis  
A system, method and computer program product are provided for filtering various voice protocols. A plurality of voice protocols is initially displayed. Next, an indication is received from a user...
7352776 Line terminator unit for a subscriber line  
The invention relates to a line terminating device for a subscriber line which transmits and receives broadband signals via a single subscriber line, a broadband signal being composed of a...
7289538 Clock reconstruction for time division multiplexed traffic transported over asynchronous ethernet networks  
A clock reconstruction mechanism for synchronous TDM communications traffic transported over asynchronous networks such as Ethernet networks. The invention is applicable to edge switches in...
7280469 Efficient implementation of large size FFT  
A system and method of implementing a Fast Fourier Transform (FFT) function in a high data rate communication network. The communication network, employing technology such as VDSL and DMT or FDM,...
7142559 Packet converting apparatus and method therefor  
A packet converting apparatus and method is disclosed, in which audio packet data of various types used in cable/radio networks can effectively be converted. The packet converting apparatus...
7130355 Amelioration in inter-carrier interference in OFDM  
In an environment where the transmission medium leading to the receiver is time-variant within a block of received signals, and where transmission medium has an finite impulse response extending...
7130658 Shared circuitry for WLAN receiver functional units  
A WLAN (Wireless Local Area Network) receiver having a synchronization unit is provided. The synchronization unit comprises a first functional unit for performing a first signal processing...
7039065 Telecommunications rack including shelves with nonredundant backplanes used redundantly  
A telecommunications rack has one or more shelves connected to a narrowband network and to a broadband network for serving a plurality of subscribers. Line termination and network termination...
7031265 Method and apparatus for performing packet detection processing  
A method and apparatus for performing packet processing is described. A signal having a preamble sequence is received. A detection parameter estimate is derived from the preamble sequence. The...
6996130 Distributed control system and filtering method used in the distributed control system  
In a distributed control system in which a plurality of nodes are connected to a transmission line, each node controlling components connected to this node and transmitting a message to other...
6990060 Polyphase-discrete fourier transform (DFT) sub-band definition filtering architecture  
A system and method for demultiplexing an RF signal including nested frequency division multiplexed (FDM) channels is disclosed. The system can demultiplex an RF signal including at least two...
6965616 Network data transmission synchronization system and method  
A number of features for enhancing the performance of a cable transmission system in which data is transmitted between a cable modem termination system at a headend and a plurality of cable modems...
6947449 Apparatus, and associated method, for communication system exhibiting time-varying communication conditions  
Apparatus, and an associated method, for communicating data pursuant to a frequency division multiplexing scheme that takes into account channel conditions on the communication channel upon which...
6925577 Method for recording/storing multiple transport streams by dividing into series of packets  
A method for recording and storing independent and/or simultaneous transport streams of data is suggested. The inventive method comprises at least a recording mode in which at least a first...
6876696 Timing device and method using a timing equalizer filter for a digital communications systems  
A method of training and operating a dual-duplex, four-wire communications system to provide for time alignment in the receivers of data that is time aligned in the transmitters, even in the...
6856682 System and method for processing an input signal communicated on a telephone line  
In one embodiment, a system is provided for processing an input signal communicated on a telephone line, the input signal including a first component associated with a first frequency band, a...
6751315 High bandwidth phone line transceiver with capacitor isolation  
A high bandwidth telephone line transceiver for connecting telecommunications equipment to a telephone line provides a pair of isolation capacitors connected to the telephone line to transmit the...
6738377 System and method for dynamic micro placement of IP connection filters  
Virtual Private Networking (VPN) is an emerging technology area enabling e-business on the Internet. A key underlying VPN technology is IP Security (IPsec), for providing private (encrypted and...
6704285 Signal multiplexer and method  
A signal multiplexer for N channel signals of different frequency bands that utilizes only N+1 hybrid couplers and presents a constant impedance to the transmitters that supply the N channel...
6633589 Switching apparatus for use in telephone house wiring  
A controller for residential telephone wiring. Apparatus associated with the controller provides multiple communication channels on ordinary residential telephone wiring. The controller (1) routes...
6487221 Digital device and method for filtering, decimation and transposition into distributed baseband and corresponding digital modulator  
The invention relates to apparatus for filtering, decimating and transposing into baseband, the apparatus being of the entirely digital type, and serving both to extract and transpose into baseband...
6434167 Communications device with extended filter and line monitoring function  
A communications device ( 100 ) with an extended filter ( 74 ) provides more bandwidth for V.34, V.90 and other data communications protocols. The device ( 100 ) permits voice and data...
6359907 Method to provide information concerning a frequency band, a head-end and a terminal realizing such a method and a communication access network including such a head-end and such a terminal  
A method for use by a terminal (or a set of terminals all communicating via for example time division multiple access) of a communication access network seeking to communicate with the head end of...
6154484 Method and apparatus for embedding auxiliary data in a primary data signal using frequency and time domain processing  
Auxiliary data is transported in subbands of a primary data signal by hiding the data in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary data...
6118794 Digital signal processing apparatus for frequency demultiplexing or multiplexing  
Digital signal processing apparatus for frequency demultiplexing a wide band channel which converts the data stream into parallel branches by means of serial-to-parallel conversion, and...
6021121 Device, method, and apparatus for selecting address words using digital segment filters  
A device for the selection of address words each having n bit locations and serving for addressing m different receiving locations of a digital communication module, in at least one of the...
6014366 Variable-bandwidth frequency division multiplex communication system  
A variable-bandwidth frequency-division multiplex communication system which needs no interpolation circuits, but uses switch element of simple structure. The system includes a signal combining...
5999575 Channel separating filter apparatus, PSK demodulator apparatus and PSK receiver apparatus each equipped with channel separating filter apparatus  
There is disclosed a channel separating filter apparatus for separating a frequency-multiplexed signal comprised of channel signals into respective channel signals. A frequency-converting section...
5982785 Combination conventional telephony and high-bit-rate digital channel transmission system comprising high pass filters which comprise both first order and second order high pass filters  
The symmetrical Cu double lead line is asymmetrically terminated by two digital signal high-pass filters, one thereof at the exchange side being formed with a high-pass filter of the 4th order and...
5920572 Transport stream decoder/demultiplexer for hierarchically organized audio-video streams  
A transport stream decoder/demultiplexer is provided which includes a program clock recovery circuit for recovering a program clock from program clock reference (PCR) values contained in selected...
5881109 Pulse shaping filter for π/4-shift QPSK modulator  
A pulse shaping filter for the π/4-shift QPSK modulator employed in IS-54 and JDC. The pulse shaping filter includes symbol determining circuits of the I-channel and the Q-channel, demultiplexers...
5870402 Multiple user digital receiver apparatus and method with time division multiplexing  
A digital receiver apparatus and method, designed for multiple simultaneous users, digitizes a received analog RF signal and tunes to multiple desired frequencies of the received signal on a time...
5838675 Channelized receiver-front-end protection circuit which demultiplexes broadband signals into a plurality of different microwave signals in respective contiguous frequency channels, phase adjusts and multiplexes channels  
A channelized protection circuit for protecting the front-end of a receiver rom the detrimental effects of interference signals within the bandwidth of received signals is disclosed. The...
5822360 Method and apparatus for transporting auxiliary data in audio signals  
Auxiliary data is transported in a conventional audio signal by hiding the data in the form of colored noise. The colored noise has a spectrum that simulates the spectrum of the primary audio...
5784378 Method and apparatus for time shaped finite impulse response filter with multiple signal stream capability  
A novel finite impulse response filter apparatus and method. A multiplexed data stream composed of two or more data streams is provided as an input to a tapped delay line. Weight and sum operators...
5757803 Pots splitter assembly with improved transhybrid loss for digital subscriber loop transmission  
A data transmission system including a telephone service subscriber loop utilized for transmission of data including telephone service signals; a splitter operable for splitting the subscriber loop...
5699363 Digital signal processing apparatus  
A digital signal processing apparatus for frequency multiplexing and demultiplexing of narrow band FDM signals has a first block fine processing stage (11) connected in series to a first block...
5659546 Wideband frequency signal digitizer and method  
A wideband frequency signal digitizer and method for digitizing multiple bands of a wideband frequency signal. The digitizer and method providing for optimally positioning a segment (402) of the...
Matches 1 - 50 out of 175 1 2 3 4 >