US Patent No. 9,281,842

METHOD AND DEVICE FOR IMPROVING DECODING OF DATA RECEIVED FROM ONE SOURCE BY SEVERAL RECEIVERS


Patent No. 9,281,842
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)

Claim of US Patent No. 9,281,842

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.