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| Number | Title | Issue Date |
| 7616700 | Method and system for slicing a communication signal A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proc... | 11/10/2009 |
| 7545879 | Demodulation circuit and electronic device To be capable of receiving many data without increasing a transfer speed. A wave detector detects a radio signal RF received by an antenna. The radio signal RF received by the antenna has been subjected to ASK modulation, for example, and by getting it through a low... | 06/09/2009 |
| 7463695 | System for five-level non-causal channel equalization A system and method are provided for five-level non-causal channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing a five-level threshold; comparing the first bit estimate to a secon... | 12/09/2008 |
| 7394863 | Methods and apparatus for signaling on a differential link Methods and apparatus are disclosed for transitioning a receiver from a first state to a second state using an in-band signal over a differential serial data link. ... | 07/01/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7342459 | Clock reproduction circuit A clock reproduction circuit receives a multi-valued input data signal to generate a reproduced clock signal with a higher accuracy. The clock reproduction circuit includes a data judgement block which judges whether or not three consecutive data are such that a fir... | 03/11/2008 |
| 7327403 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 02/05/2008 |
| 7319495 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 01/15/2008 |
| 7317491 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 01/08/2008 |
| 7317492 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 01/08/2008 |
| 7289569 | HDTV trellis decoder architecture A trellis decoding system for use in processing a High Definition Television signal. The trellis decoding system includes a traceback unit that identifies a sequence of antecedent trellis states in accordance with a state transition trellis. A branch metric computer... | 10/30/2007 |
| 7289162 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 10/30/2007 |
| 7282946 | Delay-insensitive data transfer circuit using current-mode multiple-valued logic The present invention relates to a delay-insensitive DI data transfer circuit based on a current-mode multiple-valued logic for transferring data regardless of a delay time of transmission according to a length of wire. The delay-insensitive data transfer cir... | 10/16/2007 |
| 7269212 | Low-latency equalization in multi-level, multi-line communication systems Low-latency equalization mechanisms for multi-PAM communication systems are disclosed that reduce delay and complexity in signal correction mechanisms. The equalization mechanisms tap into input signals for a multi-PAM signal driver, and compensate for attenuation a... | 09/11/2007 |
| 7269551 | Apparatus including an error detector and a limiter for decoding an adaptive differential pulse code modulation receiving signal An apparatus for decoding encoded voice data comprises a demodulator (101) which demodulates the encoded voice data (RF) and provides a demodulated encoded voice data (APO, RD), an adaptive differential pulse code modulation decoder (102) which decodes... | 09/11/2007 |
| 7259797 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 08/21/2007 |
| 7256839 | VSB reception system with enhanced signal detection for processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 08/14/2007 |
| 7248640 | System and method for providing slicer level adaption The present invention relates in general to a method, apparatus, and article of manufacture for providing high-speed digital communications through a communications channel. In one aspect, the present invention employs an automatic slicer level adaption to enhance t... | 07/24/2007 |
| 7239813 | Bit synchronization circuit and central terminal for PON systems A bit synchronization circuit composed of a multiphase data sampling unit for converting each received burst data sets to multiphase data trains, a phase determination unit for generating a control signal indicating an optimum phase data train, an output data select... | 07/03/2007 |
| 7224838 | Method and apparatus for recovery of encoded data using central value The present invention provides a method for comprising data by determining a central value that is greater than the minimum value and less than the maximum value of the range of data. In one embodiment, the central value is chosen to be a value that substantially re... | 05/29/2007 |
| 7221711 | Multilevel data encoding and modulation technique The multilevel data encoding and modulation technique uses a pair of complementary logic sets. In its most basic form, the sets are binary sets each containing a line level for a logical one and a line level for a logical zero for a total of four logic levels. The e... | 05/22/2007 |
| 7218686 | Decision threshold voltage control circuit and decision threshold voltage controlling method of clock and data recovery circuit, optical receiver, and decision threshold voltage control program According to a decision threshold voltage controlling method of feeding an optimum decision threshold voltage to a clock and data recovery circuit which converts an optical input signal into an electric signal, extracts a clock component from an input data signal am... | 05/15/2007 |
| 7212580 | Multi-level signal clock recovery technique Clock recovery of a multi-level (ML) signal can be performed in a two-step process. First, the transitions within the ML signal can be detected by a novel transition detector (TD). And second, the output of the TD circuit can comprise a pseudo-non-return-to-zero (pN... | 05/01/2007 |
| 7206876 | Input/output interface of an integrated circuit device An integrated circuit includes M first terminals and N second terminals, where M and N are positive integers, and where M>N>1. The circuit further includes a converter which receives M base-A-level input signals from the M first terminals, respectively, encodes each... | 04/17/2007 |
| 7206362 | Binary data transmission on a single information channel In the invention, it becomes possible to extract all clock information data processing data by simultaneously comparing first, second and third voltage levels to each data bit in clocked time increments wherein the magnitude of the increments is such that each binar... | 04/17/2007 |
| 7197090 | Adaptive decision regions and metrics An improved decoding technique useful for hard decision decoding, such as quadrature phase shift keying (PSK) and quadrature amplitude modulation (QAM), as well as soft-decision techniques, such as Viterbi decoding and trellis decoding. The system in accordance with... | 03/27/2007 |
| 7181205 | I/Q calibration The amplitude and phase errors of the modulation and demodulation in a transceiver are corrected by a self-calibration procedure in which a test signal is applied to the baseband input of the transmitter, and the output of the modulator is looped back to the input o... | 02/20/2007 |
| 7170949 | Methods and apparatus for signaling on a differential link Methods and apparatus are disclosed for transitioning a receiver from a first state to a second state using an in-band signal over a differential serial data link. ... | 01/30/2007 |
| 7167110 | Multi-level communication system and method with error correction A communication system for transmitting a six-phase modulated signal and including an efficient error correction system suitable for the six-phase modulated signal is disclosed. A transmitting apparatus comprises a ternary error correction encoding circuit for gener... | 01/23/2007 |
| 7167212 | VSB reception system with enhanced signal detection or processing supplemental data A VSB reception system includes a sequence generator for decoding a symbol corresponding to the supplemental data and generating a predefined sequence included in the supplemental data at VSB transmission system. The reception system also includes a modified legacy ... | 01/23/2007 |
| 7155134 | Pulse amplitude modulated transmission scheme for optical channels with soft decision decoding An amplitude modulated optical communication system and method are disclosed that achieve bandwidth compression by making use of an n level amplitude modulation scheme in one or more frequency bands. A soft decision decoder is disclosed that provides at least two so... | 12/26/2006 |
| 7139325 | System and method for five-level non-causal channel equalization A system and method are provided for five-level non-casual channel equalization in a communications system. The method comprises: receiving a non-return to zero (NRZ) data stream input; establishing a five-level threshold; comparing the first bit estimate to a secon... | 11/21/2006 |
| 7126408 | Method and apparatus for receiving high-speed signals with low latency An apparatus and method for receiving high-speed signals having a wide common-mode range with low input-to-output latency. In one embodiment, the receiver includes an integrator to accumulate charge in accordance with an input signal during an integration time inter... | 10/24/2006 |
| 7123676 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 10/17/2006 |
| 7110445 | Oversampled clip-shaping The present invention provides an apparatus, system and method of peak-to-average reduction of an oversampled signal for a digital communication system. Peak detection 504 and width measurement 504 are advantageously combined in which a peak portion or... | 09/19/2006 |
| 7110681 | Method and apparatus for optical transmission Binary information is subjected to RZ encoding and multi-level encoding, and the encoded signal is optically modulated. ... | 09/19/2006 |
| 7099400 | Multi-level pulse amplitude modulation receiver Multiple-level phase amplitude (M-PAM) clock and data recovery circuitry uses information from multiple phase detectors to generate one or more data sampling clocks that are optimized for each of the data slicers. One possible 4-PAM implementation includes 3 data sl... | 08/29/2006 |
| 7089338 | Method and apparatus for interrupt signaling in a communication network A method and apparatus for interrupt signaling. A communication network is described comprising a master device and a slave device that are both coupled to a two wire serial bus for communication. The two wire serial bus comprises a serial data (SDA) line and a seri... | 08/08/2006 |
| 7085324 | Communication system in digital television A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the su... | 08/01/2006 |
| 7085339 | Data recovery device A data recovery device for precisely recovering a transmission signal even if the signal having phase variations is provided. The device comprises a demodulator for demodulating a transmission signal, a plurality of symbol recovery units, each generating a correspon... | 08/01/2006 |
