Method of the ARQ type for a transmission method using turbocodes, and associated device
AssigneeCanon Kabushiki Kaisha
InventorsMohamed Braneci, Patrice Nezou, Pascal Rousseau
Life of this patent
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Abstract
An information packet transmission device for a communication system has a transmission part and a reception part, at least one of the transmission or reception parts having a turbocoder, and an external interleaver upstream of the turbocoder. The turbocoder preferentially has an interleaver, and a deinterleaver of the “x to xe” type. The external interleavers are of the row column or column row type.
Claims46
A device for transmitting information packets Pi from a source for a communication system, comprising a turbocoder and a logic link controller placed between the source and the turbocoder, the logic link controller having formatting means for formatting the information packets Pi to yield sequences of binary symbols ã of a length N=M·N0, where N0 and M are odd integers, the formatting being such that residual errors in each turbodecoded received sequence ã will occur, when sequence ã is written as a matrix having N0 columns and M lines, in sets of symbols on one or more columns.
A device for receiving information packets P′i for a communication system, comprising a turbodecoder and a logic link controller placed between the turbodecoder and the destination, the logic link controller having formatting means for formatting turbodecoded received sequences ã of binary symbols into information packets P′i.
A method of transmitting information packets Pi for a communication system having a transmission part and a reception part, connected by a noisy channel, in which the transmission of the information packet Pi comprises the steps of:
- formatting data cj(x) from information packets Pi,
- column-row interleaving of the data,
- turbocoding by means of a turbocoder with an interleaver of the X→Xetype, and
- modulating and transmitting over the transmission channel.
A method of receiving information packets P′i for a communication system having a transmission part and a reception part, connected by a noisy channel, in which the reception of information packets P′i comprises the steps of:
- receiving on the transmission channel and demodulating,
- turbodecoding by a turbodecoder with an interleaver of the “x to xe” type,
- row-column deinterleaving supplying data c′j(x), and
- formatting of information packets P′i, from the data c′j(x).
Dependencies are inferred from the claim text.