Nxp B.v.

St Wireless Sa

Sébastien Charpentier

Patrick Valdenaire

The invention relates to the domain of turbo decoders. Such a decoder comprises a first decoder () and a second decoder (), each decoder being able to calculate extrinsic output data from extrinsic input data coming from the other decoder. The decoding circuit according to the invention comprises a single memory () for storing the extrinsic data. When a decoder calculates an extrinsic output data from an extrinsic input data coming from the other decoder and stored in the single memory at a certain address, this extrinsic output data is then written at this same address.

Iterative turbo decoder with single memory

The present invention relates to a method using windows of data, a window (w) comprising data to be written and to be read and having a size. It is characterized in that it comprises:* A step of writing a current window of data into a unique buffer (BUF) in a first address direction, said first address direction being at an opposite direction from an address direction of the writing of a preceding window of data, said writing of said current window beginning at an address where no data of the preceding window of data have been written, said buffer (BUF) having a length greater than the maximum size of the windows of data, and* A step of reading the data of said preceding window of data from said unique buffer (BUF), from a reading address equal to a last written address of the same preceding window of data, said reading being made simultaneously to said writing of the current window of data and in the same first address direction.

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Mougins, France

Sébastien Charpentier