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| Number | Title | Issue Date |
| 8135082 | High-order modulation-based burst mapping method and apparatus in a mobile communication system A method for performing burst mapping on transmission data by a transmitter in a mobile communication system using a 16-ary Quadrature Amplitude Modulation (16-QAM) modulation scheme is disclosed. The burst mapping method includes generating control information bits... | 03/13/2012 |
| 7809071 | Wireless communication receiving device and wireless communication system A wireless communication receiving device includes an initializing section for obtaining a temporary solution from a transmission route estimation value and a reception signal, a solution candidate calculating section for obtaining a solution candidate for each dime... | 10/05/2010 |
| 7720167 | Power save mode transition using loading translation function Methods and systems provide an efficient power save mode for multi carrier modems, such as DMT based ADSL and VDSL modems. Fast transitions from power save mode to full operational mode occur, without the overhead of transmitting large quantities of configuration in... | 05/18/2010 |
| 7715487 | Wireless apparatus employing multi-level QAM and method for estimating threshold value An wireless terminal includes a demodulating unit which comprises an FV (fading vector) estimating unit for receiving a CPICH spread/demodulated signal to output an FV signal with a reduced noise ratio; a phase synchronization unit for multiplying a PDSCH spread/dem... | 05/11/2010 |
| 7421033 | Method for improving the performance of a coding in a radio communications system The invention relates to a method for improving the performance of data transmissions over a communications channel, wherein data is coded and modulated for transmission, wherein coding the data results in differently coded bits. In order to allow for a simple way o... | 09/02/2008 |
| 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 |
| 7366263 | Radio communication terminal and radio signal receiving method When a radio communication terminal including an AGC receiver starts, a set gain of the AGC receiver is switched in a short updating period. At this time, the terminal switches among antennas, and calculates and stores a received power of a received radio signal thr... | 04/29/2008 |
| 7365796 | System and method for video signal decoding using digital signal processing A digital signal processing based decoder is disclosed. The decoder asynchronously samples video signals. By doing so, the decoder can work in pseudo real-time and without analog interface components improving performance while reducing cost. ... | 04/29/2008 |
| 7366490 | Automatic gain control with gain stepping and regulation An automatic gain control device and a related method for its operation, using a first-order control loop for adjusting a received communication signal to compensate for variations in received signal power. The device bases its adjustments on a measure of the averag... | 04/29/2008 |
| 7362815 | Time-reversal block transmit diversity system for channels with intersymbol interference and method A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the... | 04/22/2008 |
| RE40241 | 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... | 04/15/2008 |
| 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 |
| 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 |
| 7324611 | Symbol decision adjustment in demodulator Methods and apparatus for use in making improved symbol decisions in a demodulator in the presence of distortion in the received signaling. In one implementation, a method includes the steps of: determining a centroid symbol location for a received symbol of a const... | 01/29/2008 |
| 7317747 | Transmitter and receiver A receiver informs a delay profile and CIR measured in an FDE or a Rake receiver, together with a bit error rate of a received signal that is required in a receiver, as quality information to a transmitter. In the transmitter, based on the delay profile and CIR cont... | 01/08/2008 |
| 7315817 | Sound encoder and sound decoder An sound encoder accepts a sound signal and then produces a plurality of codes which represent the sound signal on a frame-by-frame basis. The sound encoder determines the order in which the plurality of codes is to be multiplexed into a multiplexed code based on on... | 01/01/2008 |
| 7296163 | System and methods for encrypted execution of computer programs The invention provides a method for encrypting a program for execution on a remote host computer on a network, such that correct execution by the remote host computer is ensured, and such that the remote host computer remains unaware of the computations or data asso... | 11/13/2007 |
| 7281189 | Apparatus and method for separately modulating systematic bits and parity bits in accordance with communication quality A transmission apparatus and method turbo-encode data and output systematic bit and parity bit data. The systematic bit data and the parity bit data are modulated independently of each other such that communication quality is better when a modulation scheme for the ... | 10/09/2007 |
| 7277495 | Data communication A method and apparatus for data communication in a variety of communication systems using spread spectrum techniques and multilevel sequences in which distinct multilevel sequences used contain binary subsequences that interfere constructively such that synchronous ... | 10/02/2007 |
| 7272192 | Time-reversal block transmit diversity system for channels with intersymbol interference and method A method for diversity transmission and reception for channels with intersymbol interference is created. With this method one can transmit from two or more antennas in such a way that a receiver with one or more antennas can benefit from the diversity offered by the... | 09/18/2007 |
| 7263143 | System and method for statistically directing automatic gain control The present invention is directed to a system and method which statistically determines when regularly occurring interference events of a predictable duration will occur, for example radar pulses and dynamically adjusts an automatic gain control (AGC) for RF data tr... | 08/28/2007 |
| 7254186 | Electromagnetic wave transmitter, receiver and transceiver systems, methods and articles of manufacture The invention is directed to a system for processing an electromagnetic wave by receiving rectangular coordinate information for the electromagnetic wave; and directly converting the rectangular coordinate information into a magnitude signal, a sin(Φ), and a cos(Φ... | 08/07/2007 |
| 7245666 | Soft symbol decoding for MIMO communication systems with reduced search complexity Soft symbol decoder algorithms for multiple input, multiple output (MIMO) receivers reduce the search complexity by searching over fewer than all possible combinations of transmitted symbols to compute log metrics for each transmitted bit from each transmit antenna.... | 07/17/2007 |
| 7242726 | Parallel concatenated code with soft-in soft-out interactive turbo decoder A method for parallel concatenated (Turbo) encoding and decoding. Turbo encoders receive a sequence of input data tuples and encode them. The input sequence may correspond to a sequence of an original data source, or to an already coded data sequence such as provide... | 07/10/2007 |
| 7236519 | Transceiving filter and communication device First and second transmission paths are provided between a first port to which an antenna is connected and a second port to which a transceiving circuit is connected. First to fourth reception filters, an amplifier circuit, and first to fourth hybrid circuits are pr... | 06/26/2007 |
| 7237181 | Methods and apparatus for reducing error floors in message passing decoders An iterative message passing decoder, e.g., an LDPC decoder, operating in conjunction with a soft input-soft output signal processing unit, e.g., an ISI detector, has an error floor performance region influenced by the decoder's sub-optimal message passing nature. E... | 06/26/2007 |
| 7230973 | Multi-user detection method with accelerated sphere decoding A method is provided for detecting a plurality of symbols (dk(i)) transmitted by or for a plurality K of users, each symbol belonging to a modulation constellation. Filtering of a received signal is performed for supplying a vector (z) each component of w... | 06/12/2007 |
| 7230994 | Multi-level modulation apparatus, multi-level demodulation apparatus, multi-level modulation/demodulation communication system, program and modulation/demodulation method In a QAM modulation system, (3p+1) or (3p+2) input signal strings, where p is an integer not less than 3 or 2, are converted into three (p+1) string signals which are then allocated to three phase planes. The converted three (p+1) string signals are time-division mu... | 06/12/2007 |
| 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 |
| 7218665 | Deferred decorrelating decision-feedback detector for supersaturated communications The present invention provides an efficient means of estimating symbols transmitted in a multi-user environment in overloaded or super-saturated conditions by employing a deferred decorrelating decision feedback detector. In one embodiment, the present invention com... | 05/15/2007 |
| 7212595 | Reduced complexity time-frequency trained equalizer for discrete multi-tone based DSL systems The present invention provides a system and method for implementing a new TEQ training approach that trains TEQ coefficients by exploiting both time-domain and frequency-domain information. An advantage of this technique is that it reduces memory usage due to the tr... | 05/01/2007 |
| 7209510 | Channel estimation system for a wideband code division multiple access (WCDMA) communication system A channel estimation system is disclosed. The channel estimation system comprises a first memory element having a write function and a plurality of read functions, a pilot signal extraction element adapted to receive a first output of the first memory element, a pro... | 04/24/2007 |
| 7206352 | ATSC digital television system This disclosure describes a flexible digital transmission system that improves upon the ATSC A/53 HDTV signal transmission standard. The system includes a digital television signal transmitter for generating a first Advanced Television Systems Committee (ATSC) stand... | 04/17/2007 |
| 7203461 | Adaptive channel quality estimation algorithm to support link adaptation RF communications received by a wireless terminal from a servicing base station are used to determine the channel quality such as reported bit error probability (BEP). The RF communications may be in the form of RF bursts that are part of a data frame. An estimated ... | 04/10/2007 |
| 7191386 | Method and apparatus for additive trellis encoding A method of additive encoding of data words includes receiving a plurality of data words, and searching a trellis representation of additive code words to identify a path in the trellis representing a sequence of patterns to be used to encode the data words. The tre... | 03/13/2007 |
| 7190732 | Multilevel coding with unequal error protection and time diversity for bandwidth efficient transmission Techniques for multilevel coding of a stream of information bits in a communication system. The stream of information bits is separated into portions, and each of the portions is associated with a different level of the multilevel coding. At least one code is applie... | 03/13/2007 |
| 7190737 | Multi-mode block-coded modulation/demodulation method In digital communications, a multi-mode block-coded modulation/demodulation method carries out adaptive one-way transmission of a multi-mode digital signal by using, between at least two different modes, different settings for level number, level code, set-partition... | 03/13/2007 |
| 7187728 | Coding method and use of a receiver with a convolutional decoder A coding method for modulating carrier signals with 16 different digital states (4 bit signals) possesses a high synchronicity robustness and an at least partially improved coding gain. The coding parameters are obtained by the following steps: a) using a 2 ASK/8 PS... | 03/06/2007 |
| 7180967 | Coding apparatus and coding method A coding apparatus capable of preventing deterioration in demodulation performance without increasing interfering power. In the apparatus, a turbo coding section (100) performs turbo coding on transmission data, and outputs systematic bits and parity bits. A ... | 02/20/2007 |
| 7173978 | Method and system for turbo encoding in ADSL In a coding system for asymmetric digital subscriber line (ADSL) communications, a method of encoding a sequence of information bits is provided comprising the steps of dividing the information bits into encoding bits and parallel bits; encoding the encoding bits to... | 02/06/2007 |
