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Efimov, RU
Andrey Efimov, St. Petersburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20100146360 | Unified Decoder for Convolutional, Turbo, and LDPC Codes - A unified decoder ( | 06-10-2010 |
Andrey Efimov, Saint-Petersburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20080292025 | Low Density Parity Check (Ldpc) Code Decoder - A message-passing decoder for low-density parity-check codes (LDPC) is provided using a multi-value threshold scheme which is updated throughout the decoding iterations. In an embodiment the check node processing is implemented using the min-sum principle whereby for each corresponding row of the parity check matrix a first and a second minimum value among bit reliability values is determined. Each row of the decoder comprises one or more associative processing elements controlled by a row control element to determine the two minimum values. Each column comprises one or more associative processing elements, an input processing element, and a column control element to determine hard decision bits. The usage of processing elements to construct a decoder may reduce the gate count and decrease the interconnects used to couple the elements. | 11-27-2008 |
| 20090259907 | Inter-packet selective symbol mapping in a joint incremental redundancy and symbol mapping diversity system - An integrated incremental redundancy symbol mapping diversity system for a communication device. The integrated incremental redundancy symbol mapping diversity system includes a transmitter. The transmitter packetizes a retransmission packet according to a modulation scheme in response to a retransmission request from the receiver. The transmitter includes an output packet processor and an inter-packet selective symbol mapper. The output packet processor determines a transmission iteration of a bit segment of the retransmission packet. The inter-packet selective symbol mapper applies a first symbol map pattern to the bit segment based on the transmission iteration of the bit segment and applies a second symbol map pattern to another bit segment of the retransmission packet based on the transmission iteration of the other bit segment. The first symbol map pattern is different from the second symbol map pattern. | 10-15-2009 |
Andrey Gennadievich Efimov, St. Peterburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20100070825 | Fast Low-Density Parity-Check Code Encoder - Methods, apparatus, and systems are provided to encode a low-density parity-check codeword for transmission in a communications channel. In an embodiment, the encoding may include partially computing parity-check bits in response to receiving a block of message bits before obtaining all the message bits for the low-density parity-check codeword, including updating previously partially computed parity-check bits that depend on the received block. | 03-18-2010 |
Andrey Gennadievich Efimov, Saint Petersburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20100031120 | MODIFICATION TO MEGGITT DECODER FOR BURST ERROR CORRECTION CODES - Apparatus and methods are provided to correct burst errors from a communication channel. Embodiments may include correcting burst errors in received data using a decoder configured as a Meggitt decoder with an additional selection criterion to correct a burst error having a length larger than the code error correction capability. | 02-04-2010 |
Andrey Gennadievich Efimov, St. Petersburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20100146371 | Modified Turbo-Decoding Message-Passing Algorithm for Low-Density Parity Check Codes - Apparatus and methods arc provided to decode signals from a communication channel to reconstruct transmitted information. Embodiments may include applying a plurality of decoders to a code, in which reliability values are provided to a decoder such that the decoder receives the reliability values determined by and provided from only one other decoder of the plurality of decoders. A valid codeword may be output from application of the plurality of decoders to the code. | 06-10-2010 |
Andrey Gennadlevich Efimov, St. Petersburg RU
| Patent application number | Description | Published |
|---|---|---|
| 20090274239 | Prescribed Response Precoding for Channels with Intersymbol Interference - Methods and apparatus are provided for prescribed response precoding schemes for signal transmission in channels with intersymbol interference. An embodiment includes generating a prescribed feedback filter polynomial as the quotient of a feedback filter polynomial and a target polynomial to form a feedback filter in a precoder, where the target polynomial is a divisor of the feedback filter polynomial. | 11-05-2009 |
Sergei V. Efimov, Moscow RU
| Patent application number | Description | Published |
|---|---|---|
| 20090317000 | METHOD OF CORRECTING ORIENTATION OF AN IMAGE IN AUTOMATIC PRINTING, AND AN IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS THEREOF - An image forming method includes receiving an image, detecting a text area from the image, transforming the detected text area into a binary image and calculating an asymmetry parameter of the binary image, and detecting orientation of the image based on the calculated asymmetry parameter. | 12-24-2009 |