20110161785 | METHOD FOR TRANSMITTING A DIGITAL SIGNAL BETWEEN AT LEAST TWO TRANSMITTERS AND AT LEAST ONE RECEIVER, USING AT LEAST ONE RELAY, AND CORRESPONDING PROGRAM PRODUCT AND RELAY DEVICE - A method is provided for transmitting a digital signal between at least two transmitters and at least one receiver, using a concatenation of at least two codes. The method includes a first encoding step, in the transmitters, which outputs at least two first code words; a first transmission step of the first code words, via at least two distinct transmission channels; a receiving step, in at least one relay device, of at least two of the first code words, known as intermediate code words; a step of intertwining at least one part of the bits of the intermediate code words that outputs the intertwined bits; a second step of encoding the intertwined bits, in the relay(s), which outputs at least one second code word, taking into consideration the intermediate code words; a second step of transmitting the second code word(s) through the relay device(s), so as to enable, in the receiver(s), an iterative decoding, taking into account the first code words, and then a redundancy formed by the second code word(s). | 06-30-2011 |
20100039588 | METHOD FOR MANUFACTURING A PSFLC-BASED AND/OR PSAFLC-BASED ELECTROOPTIC CELL AND CORRESPONDING ELECTROOPTIC CELL, DEVICE AND HELMET - A method is provided for manufacturing an electrooptic cell, which includes two plates of optically transparent material and at least one thickness of a composite gel based on a smectic liquid crystal and on a polymer provided between the plates, wherein the gel is in a smectic phase at ambient temperature. The method includes injecting a mixture of a ferroelectric and/or anti-ferroelectric smectic liquid and a monomer between the plates, wherein the monomer content of the mixture is between 5 and 25% by weight. The mixture is heated to above its smectic phase/nematic phase transmission temperature so that the mixture is in the nematic phase. The mixture is irradiated, by ultraviolet radiation, so as to polymerize the monomer and thus obtain the gel. During the irradiation step, an electric or magnetic field is applied to the mixture. | 02-18-2010 |