Patent No. | 9,281,842 |
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Issue Date | March 08, 2016 |

Title | Method And Device For Improving Decoding Of Data Received From One Source By Several Receivers |

Inventorship | Mounir Achir, Chantepie (FR) Philippe Le Bars, Thorigne Fouillard (FR) |

Assignee | Canon Kabushiki Kaisha, Tokyo (JP) |

1. A method for improving decoding of at least one set of k data symbols received from a plurality of receivers, the data

symbols being encoded by a systematic block error correcting code of dimension k and size n, k being smaller than n, the set

of data symbols being received along with a corresponding subset of parity symbols, forming a partial data block comprising

m symbols, m being smaller than n, the method comprising:

receiving, from each receiver of a plurality of receivers, a partial data block transmitted by one emitter, the received partial

data block comprising a set of k data symbols and a subset of (m?k) parity symbols;

for each received partial data block, generating at least a subset of parity symbols from the received set of data symbols;

computing an item of reliability information as a function of at least the received parity symbols and parity symbols generated

from a received set of data symbols;

comparing the items of computed reliability information with each other; and

selecting one received set of data bits as a function of comparing the items.

symbols being encoded by a systematic block error correcting code of dimension k and size n, k being smaller than n, the set

of data symbols being received along with a corresponding subset of parity symbols, forming a partial data block comprising

m symbols, m being smaller than n, the method comprising:

receiving, from each receiver of a plurality of receivers, a partial data block transmitted by one emitter, the received partial

data block comprising a set of k data symbols and a subset of (m?k) parity symbols;

for each received partial data block, generating at least a subset of parity symbols from the received set of data symbols;

computing an item of reliability information as a function of at least the received parity symbols and parity symbols generated

from a received set of data symbols;

comparing the items of computed reliability information with each other; and

selecting one received set of data bits as a function of comparing the items.