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| Number | Title | Issue Date |
| 8064534 | Single-wire asynchronous serial interface The present invention discloses a single-wire asynchronous serial interface, and a method for transmitting commands and data through one transmission wire, wherein the transmission wire is capable of transmitting signals of three level states. The disclosed interfac... | 11/22/2011 |
| 8045640 | Two-level demodulation method and device The invention relates to a method for demodulating information emitted by amplitude modulation with two levels by a reader (2) to a transponder (4), comprising a step to determine if this symbol is identical to or is different from the previous symbol,... | 10/25/2011 |
| 8027405 | Data communication using constant total current A data communication system, comprising at least three signal conductors and a first and a second power supply terminal, for supplying currents of mutually opposite direction to the signal conductors respectively. A driver circuit establishes respective combinations... | 09/27/2011 |
| 7965788 | Data receiving apparatus To provide a receiving apparatus which is capable of demodulating information data from a multi-level modulated signal, which is generated by using a Y-00 protocol, without using high-performance component parts. In the receiving apparatus, the soft decision section... | 06/21/2011 |
| 7839946 | Data communication apparatus and data communication method A data communication apparatus improves security against eavesdropping for secret communication by using Y-00 protocol. A multi-level code generation section generates, based on key information, a multi-level code sequence in which a signal level changes so as to be... | 11/23/2010 |
| 7801242 | Frequency domain equalization of communication signals A system and method for estimating a channel spectrum. The method includes: (a) receiving an input signal from a channel, where the input signal includes one or more major echoes and zero or more minor echoes introduced by the channel; (b) identifying the one or mor... | 09/21/2010 |
| 7672393 | Single-wire asynchronous serial interface The present invention discloses a single-wire asynchronous serial interface, and a method for transmitting commands and data through one transmission wire, wherein the transmission wire is capable of transmitting signals of three level states. The disclosed interfac... | 03/02/2010 |
| 7620116 | Technique for determining an optimal transition-limiting code for use in a multi-level signaling system A technique for determining an optimal transition-limiting code for use in a multi-level signaling system is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for determining an optimal transition-limiting code for use in a... | 11/17/2009 |
| 7580472 | Generation and detection of non-binary digital sequences Method and apparatus for generating ternary and multi-valued Gold sequences, are disclosed. Also methods to detect ternary and multi-valued sequences are disclosed. The detection can be performed by a ternary or multi-valued LFSR descrambler when the sequences are g... | 08/25/2009 |
| 7496149 | 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. ... | 02/24/2009 |
| 7486741 | Wireless transmitting/receiving device and method thereof The present invention discloses a wireless transmitting/receiving apparatus for transmitting and receiving large amounts of digital data using a commercial wireless transmitting/receiving apparatus. The wireless transmitting apparatus includes a data converter for m... | 02/03/2009 |
| 7480342 | Soft value calculation for multilevel signals A sub-optimal method is disclosed for calculating the reliability values (soft values) for the bits of a multilevel signal. The log-likelihood values are approximated using only the dominant terms, so called max-log approximation, that is for each bit position only ... | 01/20/2009 |
| 7471733 | Digital transmission of broadcast signals, including HDTV signals, over a microwave link Methods and apparatus are provided for the provision of high definition television services over an analog or digital broadcast infrastructure. In one aspect, the present invention provides a method for transmitting a plurality of digital data streams over an analog... | 12/30/2008 |
| 7469016 | Circuit for generating ternary signal A circuit for generating a ternary signal that receives a binary input-control signal and a binary reset signal and outputs a ternary signal. The circuit includes first to third transistors, each source terminal thereof is respectively connected to the three power s... | 12/23/2008 |
| 7397862 | Method of designing interleavers for multiple-encoder MIMO OFDM systems An improved interleaver design to fully explore the diversity of the MIMO OFDM systems provides higher diversity gain than usual. A method for wireless data communication using such interleaver design implements parsing a bit stream into multiple spatial data stream... | 07/08/2008 |
| 7394875 | Beaulieu series approach to optimal UMTS RACH preamble detection estimation A method for preamble detection in mobile unit to base unit wireless telephony sets a preamble detection threshold based upon a Beaulieu series computation dependent upon preamble correlation data. This preamble detection threshold adjusts for noise by assuming the ... | 07/01/2008 |
| 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 |
| 7391816 | Decoding upstream V.92-encoded signals A decoder may include a constellation mapper arranged to receive a symbol and to determine two constellation points that are proximate the received symbol. An index mapper may determine a constellation index corresponding to the received symbol based on the received... | 06/24/2008 |
| 7391834 | Pulse amplitude modulated system with reduced intersymbol interference A system and method for encoding and receiving data is provided. The data is encoded as a pulse amplitude modulated signal such that the amplitude signals do not transition from the highest signal level to the lowest signal level and do not transition from the lowes... | 06/24/2008 |
| 7372914 | Control system methods and apparatus for inductive communication across an isolation barrier Improved control apparatus and methods transfer information between devices, such as controllers and field devices, utilizing a modulator that generates a pulse width modulated (PWM) signal containing information to be transferred by a first of the devices, e.g., th... | 05/13/2008 |
| 7366470 | Inter-modulation distortion compensation An Inter-modulation distortion measurement and correction method which could be applied over a communication channel that is a combination of either or both analog and digital channels. This method is applicable for a communication system between a modem pair. ... | 04/29/2008 |
| 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 |
| 7363219 | Hybrid speech coding and system Hybrid linear predictive speech coding system with phase alignment predictive quantization zero phase alignment of speech prior to waveform coding aligns synthesized speech frames of a waveform coder with frames synthesized with a parametric coder. Inter-frame inter... | 04/22/2008 |
| 7362980 | Duobinary transmission system and method An optical duobinary transmission system and method are provided for transmitting optical duobinary signals across an optical transmission link having residual dispersion. The system includes a transmitter having a low bandwidth modulator, adapted to provide filteri... | 04/22/2008 |
| 7362979 | Apparatus and method for duobinary transmission An apparatus and method are provided for transmitting an optical duobinary signal using a low bandwidth modulator having a bandwidth of less than about 60% of the transmission bit rate of the transmitter. The modulator is adapted to provide low pass filtering for lo... | 04/22/2008 |
| 7362735 | Quality dependent data communication channel A data channel to transmit data from a transmitter to one or more of a plurality of receivers, each of which intermittently reports to the transmitter its reception quality of signals transmitted by the transmitter. The transmitter transmits the data in frames which... | 04/22/2008 |
| 7362813 | 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... | 04/22/2008 |
| 7359450 | Digital transmission of broadcast signals, including HDTV signals, over a microwave link Methods and apparatus are provided for the provision of high definition television services over an analog or digital broadcast infrastructure. In one aspect, the present invention provides a method for transmitting a plurality of digital data streams over an analog... | 04/15/2008 |
| 7359452 | Systems and methods for designing a high-precision narrowband digital filter for use in a communications system with high spectral efficiency Systems and methods for transmitting information at very high data rates through narrowband communication channels are provided. The systems and methods involve modulating a message signal with a novel return-to-zero, abrupt phase modulation technique and filtering ... | 04/15/2008 |
| 7359391 | Multi-port network interface circuit and related method for scrambling codes of different ports with different seeds and resetting signal transmission of different ports at different times A multi-port network interface circuit and related control method. The network interface circuit has a plurality of PHY circuits, each of the PHY circuit is used for transmitting signals to a plurality of corresponding network nodes via different ports. Each of the ... | 04/15/2008 |
| 7356088 | M-dimension M-PAM trellis code system and associated trellis encoder and decoder An M-dimension M-PAM trellis code encoder, a method of encoding user bits and a decoder. In one embodiment, the encoder includes: (1) a convolutional encoder portion configured to encode at least two user bits into at least three coded bits and (2) a sublattice sele... | 04/08/2008 |
| 7355532 | voltage level coding system and method We describe a voltage level coding system and method. The voltage level coding system includes a level encoder having an input to receive data segments coded using a first code and an output to supply second data codes indicating one of 2N plus at least o... | 04/08/2008 |
| 7350123 | Test apparatus, correction value managing method, and computer program A test apparatus includes a test module including a correcting unit for correcting the timing at which the test signal is to be supplied to the device under test or a voltage level of the test signal to the device under test, a correction value holding unit for hold... | 03/25/2008 |
| 7349532 | Picture and video message center system A message originator sends a picture or video message to a message center along with caller identifying information. The message is stored in a memory and transmitted to a wireless picture phone, PDA or portable computing device, or stored at the message center in a... | 03/25/2008 |
| 7349672 | Digital signal transceiver A digital signal transceiver includes a frequency modulator for outputting a high-frequency signal frequency-modulated with a digital signal input thereto, a power amplifier, an antenna terminal, and an antenna switch. The antenna switch includes a first branch port... | 03/25/2008 |
| 7342954 | Adaptive modulation for wireless networks The invention relates to communication between terminals. Where communication is over an ideal channel then a high throughput modulation scheme can be used. Where the terminals suffer interference or noise, transmission can be modified to a more robust modulation sc... | 03/11/2008 |
| 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 |
| 7339502 | Method and device for transmitting data over a plurality of transmission lines In the case of a method and a device for transmitting data units by way of a transmission medium that comprises at least three adjacent transmission lines, first of all a plurality of codes is supplied. Each code has a number of code sections that corresponds to the... | 03/04/2008 |
| 7340183 | Optical communications systems, devices, and methods A method of transmitting an optical communications signal, comprising receiving a first signal, encoding the signal with a differential or duobinary encoding scheme, encoding the signal with an oscillating signal component, and sub-carrier modulating the signal onto... | 03/04/2008 |
| 7340657 | On-chip high-speed serial data analyzers, systems, and associated methods In an embodiment, a method includes forming a plurality of time/voltage points from a number of voltage values and from a number of time values, generating serialized data having a predetermined number of bits, comparing the serialized data to a set predetermined vo... | 03/04/2008 |
