A decoder having a gain controller in a mobile communication...

Details A decoder having a gain controller in a mobile communication... A decoder having a gain controller in a mobile communication...

H - Electricity

04

B

H04B 1/40 (2006.01) H03G 3/30 (2006.01)

Patent

CA 2319472

An iterative decoder with a gain controller in a mobile communication system. In the iterative decoder, a first component decoder receives a first extrinsic information signal, a first parity signal, and a systematic code signal, decodes the systematic code signal out of the received signals, and generates a primary decoded signal including a second extrinsic information component. Here, the first and second extrinsic information signals remove noise in the input signals to the first and second component decoders. A second component decoder receives the primary decoded signal from the first component decoder and a second parity signal, decodes the decoded signal out of the received signals, and generates a secondary decoded signal and the first extrinsic information signal. One or more gain controllers are connected between the first and second component decoders, for attenuating either or both the first and second extrinsic information signals.

L'invention concerne un décodeur itératif à commande gain pour système de communications mobiles. Dans le décodeur itératif, un premier décodeur de composante reçoit un premier signal d'information extrinsèque, un premier signal de parité, et un signal de code systématique. Il décode ce dernier signal parmi les signaux reçus et fournit un signal primaire décodé comprenant une seconde composante d'information extrinsèque. A ce stade, les premier et second signaux d'information extrinsèque éliminent le bruit dans les signaux d'entrée aux premier et second décodeurs de composante. Un second décodeur de composante reçoit le signal primaire décodé depuis le premier décodeur de composante et un signal de parité secondaire. Il décode le signal décodé parmi les signaux reçus et fournit un signal décodé secondaire ainsi que le premier signal d'information extrinsèque. Une ou plusieurs unités de commande de gain sont prévues entre les premier et second décodeurs de composante, pour atténuer le premier ou le second signal d'information extrinsèque ou les deux à la fois.

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