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| Number | Title | Issue Date |
| 8149976 | 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 and extracted by the local detector. During the preamble, an initial fr... | 04/03/2012 |
| 8107577 | Communication protocol method and apparatus for a single wire device The present invention is a noise tolerant communication protocol device and method where a clock signal input triggers an internal delay clock in an integrated circuit. Data is presented to an input pin and sampled prior to the next external clock pulse based on the... | 01/31/2012 |
| 8107576 | Synchronization method and related apparatus of an OFDM digital communication system A synchronization method and related apparatus of an OFDM digital communication system are disclosed for determining a position of a synchronization byte in a received signal. The method includes extracting a transmission parameter signal (TPS) from the received sig... | 01/31/2012 |
| 8081726 | Method and apparatus for synchronizing data in utility system A time synchronization device (TSD) that produces a synchronization signal and couples it onto energized power conductors in a power monitoring system. Monitoring devices coupled to the TSD include frequency detection algorithms, such as a Goertzel filter, for detec... | 12/20/2011 |
| 8081727 | Radio communication apparatus and system A radio communication apparatus connected to a device including a digital signal processing unit generating a clock signal, the apparatus includes an acquisition unit acquiring frequency information concerning the clock signal from the digital signal processing unit... | 12/20/2011 |
| 7899143 | Adjustment mechanism for source synchronous strobe lockout An apparatus for adjusting a lockout time in a source synchronous strobe receiver, including a delay-locked loop (DLL) and receivers. The DLL receives a reference clock and generates adjusted and encoded vectors, both indicating a first time period. A select vector ... | 03/01/2011 |
| 7869552 | Receiving apparatus for performing frequency synchronization using specific code pattern In a receiving apparatus for receiving communication data from a transmitting apparatus, specific code patterns are inserted in the communication data at predetermined intervals. The receiving apparatus includes a first frequency difference measurement device for me... | 01/11/2011 |
| 7801260 | Peak detection accuracy A time reference point can be determined in a radio system by sending a synchronization sequence s(i), i=0, . . . N−1, from transmitter X, 40 to receiver Y, 48, and by detecting the peak value at the output of a matched-filter, 44, h(i)=s(N−... | 09/21/2010 |
| 7787579 | Frame synchronous control for use in a DSRC system using operational information provided from input circuitry of an on-board unit A frame synchronous circuit operable in a dedicated short-range communication system, applicable to several modulation schemes, includes a UW detector for detecting a UW word from received data, an operation setting register group for specifying the operations of an... | 08/31/2010 |
| 7742552 | Spread spectrum clock generator with controlled delay elements A programmable spread spectrum clock generator (SSCG) reduces electromagnetic interference by spreading the frequency bandwidth of an output signal. The rate at which the frequency of the output signal changes, as well as other aspects of the output signal, are soft... | 06/22/2010 |
| 7433418 | Method and apparatus for efficient storage of training sequences for peak to average power constrained modulation formats Some embodiments store a training sequence in a communications system. The stored training sequence exhibits certain desirable characteristics when used by a peak to average power constrained modulation format. In one embodiment, a set of original ordered sequences ... | 10/07/2008 |
| 7434192 | Techniques for optimizing design of a hard intellectual property block for data transmission Techniques are provided for implementing channel alignment for a data transmission interface in an HIP block on a programmable logic integrated circuit. The HIP block channel alignment logic can be run using a reduced number of parallel data paths, which consumes su... | 10/07/2008 |
| 7430261 | Method and bit stream decoding unit using majority voting A method and a bit stream decoding unit for bit stream decoding has a bit stream comprising a number of consecutive samples. In order to provide for rapid and, in particular, reliable decoding of the bit stream, a detection window comprising a number of samples is d... | 09/30/2008 |
| 7424046 | Spread spectrum clock signal generation system and method A system and method for generating a clock signal having spread spectrum modulation. The method involves generating a clock signal by generating edge positions for edges of the clock signal from a digital representation of a timing for each edge to impart spread spe... | 09/09/2008 |
| 7406143 | Transceiver having a jitter control processor with a receiver stage and a method of operation thereof The present invention provides a transceiver couplable to a communications network having a jitter control processor and method of operating the same. In one aspect of the present invention, the jitter control processor of the transceiver includes a receiver stage. ... | 07/29/2008 |
| 7382845 | Distribution of synchronization in an ethernet local area network environment Systems and methods are described for distribution of synchronization in a packet switched local area network environment. A method for extracting network synchronization timing from a data transmission burst includes: recovering a clock during the data transmission... | 06/03/2008 |
| 7382846 | Off-symbol correlation technique A method of correlating a signal to a synchronization pattern is disclosed. The signal has a waveform with frequency and phase angle components that may be varied, at each repeated signal pulse, to communicate a change in a bit pattern of the signal. A synchronizati... | 06/03/2008 |
| 7379517 | Method and apparatus for signaling characteristics of a transmitted signal A method and apparatus are provided that allow exploitation of the common mode characteristics of a differential transmission network to provide an additional data signal. Signal (MODE) represents either a binary signal or a multi-valued signal to allow signaling of... | 05/27/2008 |
| 7370531 | Detection circuits, detection method and systems of measuring physical quantities A detection circuit 30 has a unit 30a for inputting a signal to be detected by synchronized wave detection, a unit 30b for inputting a standard signal for the signal to be detected and a unit 30c for inputting an offs... | 05/13/2008 |
| 7372929 | Closed loop sub-carrier synchronization system A system and method for synchronizing sub-carriers in a signal processing system. Various aspects of the present invention may comprise method steps and structure that receive a sampled signal. Various aspects may produce a synchronization signal based on the sample... | 05/13/2008 |
| 7366267 | Clock data recovery with double edge clocking based phase detector and serializer/deserializer A programmable logic device (“PLD”) is augmented with programmable clock data recover (“CDR”) circuitry to allow the PLD to communicate via any of a large number of CDR signaling protocols. The CDR circuitry may be integrated with the PLD, or it may be wholl... | 04/29/2008 |
| 7366257 | Carrier recovery device of digital TV receiver A carrier recovery device of a digital TV receiver is disclosed, which can stand a multiple path noise. In the carrier recovery device, it is possible to recover a carrier with a phase error component of the carrier existing on data blocks as well as a carrier signa... | 04/29/2008 |
| 7359314 | Signal transmission system for transmitting a signal with a guard interval and a demodulation method thereof Difference between a received signal which is an OFDM modulated signal having a guard interval and a delayed signal acquired by delaying the received signal by time equivalent to a data interval is calculated, a reference signal of an FFT calculation window is gener... | 04/15/2008 |
| 7359461 | Apparatus and method for recovering clock signal from burst mode signal There are provided an apparatus and method for recovering a clock signal from a burst mode signal. A first delay delays an input data signal for half of a time period of the input data signal, and produces a first delay signal. An XOR gate adds the input data signal... | 04/15/2008 |
| 7359407 | Data interface that is configurable into separate modes of operation for sub-bit de-skewing of parallel-fed data signals A data interface is provided that can de-skew data signals by taking into account different skewing effects on each data signal. The data interface can be used, for example, in a communication system and can be configured to operate in one of three possible modes of... | 04/15/2008 |
| 7346095 | Spread spectrum clock generator with controlled delay elements A programmable spread spectrum clock generator (SSCG) reduces electromagnetic interference by spreading the frequency bandwidth of an output signal. The rate at which the frequency of the output signal changes, as well as other aspects of the output signal, are soft... | 03/18/2008 |
| RE40134 | Communication system At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point g... | 03/04/2008 |
| 7336627 | Digital subscriber line transmission method, apparatus and system A digital subscriber line transmission (xDSL) system includes a transmitting side which transmits training symbols by adding some data that is contained in a training symbol sequence onto at least one of the beginning and the end of this symbol sequence and then tra... | 02/26/2008 |
| 7336751 | Power control circuit and radio transmission apparatus The invention relates to power control of a cellular mobile communication system using TPC, and a power control circuit in a base station set and a radio terminal is equipped with a synchronism detecting unit for detecting synchronism data indicating synchronism est... | 02/26/2008 |
| 7330514 | Methods and apparatus to mitigate cross-talk interference A circuit board includes a pair of interconnects configured to support conveyance of a differential mode communication signal, which comprises a balanced first signal (e.g., signal X) and corresponding second signal (e.g., signal −X) of opposite polarities. A tran... | 02/12/2008 |
| 7330489 | Distributed data synchronization apparatus and method Disclosed is a method and apparatus for synchronizing data in a number of separate integrated circuits. In one embodiment, the apparatus includes a first integrated circuit configured to receive first data, and a second integrated circuit coupled to the first integr... | 02/12/2008 |
| 7308025 | Transmitters providing cycle encoded signals In some embodiments, the inventions includes a transmitter including a cycle encoding circuit to receive a data input signal and to provide a full cycle encoded signal in response thereto by continuously joining portions of different encoding signals. Some of the en... | 12/11/2007 |
| 7292669 | Null symbol detection device In a null symbol detection device, at the time of receiving a terrestrial digital broadcast, a null symbol can be stably detected even under a fading environment. A synchronous addition buffer group is provided subsequent to an amplitude detector so as to synchronou... | 11/06/2007 |
| 7292668 | Data processor and data processing method In a data processor, a pickup head reads the data from a memory medium. Such data transferred in a plurality of parallel bits in synchronization with the clock signal to a controller unit from a read channel unit. The controller unit detects the predetermined mark f... | 11/06/2007 |
| 7289539 | Synchronization of stereo glasses in multiple-end-view environments Methods and apparatus for synchronizing a stereo viewing device in a multiple end-view environment. Two or more video streams and a corresponding number of signals, each synchronous with one of the video streams, are provided. Each of the video streams may have a di... | 10/30/2007 |
| 7281065 | Long latency interface protocol A system includes a read/write channel and a hard disk controller. The hard disk controller includes a latency-independent interface that communicates with the read/write channel. A serial control data circuit transmits a serial control data signal including serial ... | 10/09/2007 |
| 7280603 | DSL receivers for TCM-ISDN environments and methods of operating same A digital subscriber line (DSL) receiver includes a discrete multitone (DMT) receiver circuit operative to receive a DSL signal and to generate signal samples corresponding to respective frequency division multiplexed tones of the DSL signal. The receiver further in... | 10/09/2007 |
| 7272679 | Protocol independent data transmission using a 10 Gigabit Attachment Unit interface Transmitting data across a scalable, flexible speed, serial bus in a communication protocol independent manner. ... | 09/18/2007 |
| 7266097 | Communication method and apparatus A set of formats and protocols is proposed for a satellite communications system. In these formats, a pilot signal (PS) is inserted after every 25 or 29 data symbols. The formats consist of SCPC frames (F) which may contain either data (D) and in-band signaling info... | 09/04/2007 |
| 7260167 | Method and apparatus for synchronization of a bit stream for long latency date detection A method is for decoding a bit stream from a waveform representing the bit stream, having a first synchronization mark, data, and a second synchronization mark. Digitized samples are decoded to form a reconstructed bit stream. The reconstructed bit stream is then st... | 08/21/2007 |
