Stmicroelectronics S.r.l.

Andrea Concil

Andrea Giorgi

Stefano Valle

Piero Castoldi

Giuseppe Avellone

Hisashi Kobayashi

Luca Fanucci

Lorena Simoni

Riccardo Grasso

Rizziero Gorla

An embodiment of a telecommunications device includes means for providing a set of words, each word including a plurality of digital symbols; a first memory area for storing the set of words, the first memory area including a first sequence of memory locations each one for storing a symbol; a second memory area for storing a composite frame including a predetermined number of symbols, the second memory area including a second sequence of memory locations; conversion means for converting the set of words in the first memory area into the frame in the second memory area, the conversion means including reduction means for reducing each word by removing a set of symbols from the word according to a puncturing algorithm, and expansion means for expanding each word by adding a set of additional symbols to the word according to a repeating algorithm; and means for transmitting the frame.

Transmitter/receiver system with efficient memory management in rate matching processes

In a digital system using a turbo code, a method for performing iterative decoding in accordance with a Log-MAP Algorithm comprises the steps of:&#x2014;generating a look-up table comprising a plurality of values representative of a correcting factor;&#x2014;performing a first calculation to obtain a forward metric;&#x2014;performing a second calculation to obtain a backward metric;&#x2014;performing a third calculation to obtain a log-likelihood ratio for every information bit to be decoded. In accordance with the method, at least one and no more than two of such calculations are performed by the use of said look-up table for implementing the Log-MAP decoding algorithm and the remaining calculations are performed implementing a Max-Log-MAP decoding algorithm.

Method for iterative decoding in a digital system and apparatus implementing the method

A method performs iterative decoding of information coded by an error correction code. The method includes: defining a transcendent first function representing a quantity to be evaluated for the decoding method; defining a quantized second function approximating the first function; computing first values of the second function obtained based on first arguments; the first values being not null and the first arguments being variable in a limited range having a maximum limit; computing second values of the second function obtained on the basis of second arguments, the second values being null; and generating a look-up table representing the first function and containing the first and second values associated to indexes correlated to said first arguments and to an expected maximum limit.

Method for iterative decoding employing a look-up table

A receiver for receiving digital signals exposed to intersymbol interference as well as multiple access interference the method including linearly detecting said signals by combating said intersymbol interference by equalizing said received digital signals as well as mitigating said multiple access interference by detecting said digital signals using sliding window detection.

Growing community of inventors

Novara, Italy

Andrea Concil