Stmicroelectronics Asia Pacific Pte Limited

Lantiq Deutschland Gmbh

Lantiq Beteiligungs Gmbh & Co. Kg

Ravindra Singh

Raj Kumar Jain

Hak Keong Sim

Sajal Kumar Das

Anoop Kumar Krishna

Rohit Gupta

A coded signal is received via a physical channel. The coded signal is encoded by a parity check matrix. In some examples, the coded signal is low density parity check-encoded. The coded signal is decoded to determine a result signal. Said decoding alternatingly updates, for each one of a number of iterations, bit node values representing bits of the result signal and check node values representing constrains of the parity check matrix. In some examples, the decoding determines the result signal at a first precision and updates at least partly at a second precision which is lower than the first precision. In further examples, the number of iterations is dynamically adjusted.

Low-density parity check decoding

Systems and methods for processing data signals are described. In one implementation, a demodulator and a first decoder unit, such as a convolutional encoder or a quadrature amplitude modulation decoder, for receiving the output of the demodulator, decoding the second level of encoding and outputting a decoded signal and a first error indication signal indicative of errors in the decoded signal are provided. The decoded signal may be passed through a de-interleaving unit to form a de-interleaved signal. The first location signal may be passed to an identifier unit which receives it, and from it produces a second error indication signal indicative of the errors in the de-interleaved signal. The de-interleaved signal and the second error indication signal may be transmitted to a redundancy decoder, where the signals may be used to perform redundancy decoding.

Decoder system for data encoded with interleaving and redundancy coding

A system for processing a data signal (such as an ADSL or VDSL signal) includes a first decoder unit, such as a convolutional decoder or a QAM decoder, for receiving the data signal, decoding the second level of encoding and outputting a decoded signal and a first error indication signal indicative of errors in the decoded signal. A redundancy decoder employs the decoded signal and the first error indication signal (or transformed versions thereof) to perform redundancy decoding.

System for impulse noise and radio frequency interference detection

A method for performing a search of a codebook is provided. The codebook includes a plurality of tracks each having a plurality of even pulse positions. The method includes partitioning a codevector having a plurality of pulses into a first subset of pulses and a second subset of pulses. Each pulse is assignable to a pulse position in the codevector, and each pulse is associated with a shift bit for indicating an odd position. The method also includes performing a first search for determining a first set of possible pulse positions for the pulses in the codevector. The method further includes performing a second search for determining a second set of possible pulse positions for the pulses in the codevector. In addition, the method includes forming the codevector using the first and second sets of possible pulse positions.

System and method for supporting multiple speech codecs

A multi-tone synchronous collision resolution system permits communication nodes within a MANET to contend simultaneously for a plurality of available channels. The communication nodes contend for access using a synchronous signaling mechanism that utilizes multiple tones in a synchronous manner to resolve contentions. Contentions are arbitrated locally, and a surviving subset of communication nodes is selected. The communication nodes of the surviving subset then transmit data packets simultaneously across the available communication channels.

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Singapore, Singapore

Ravindra Singh