Transcription of Turbo Codes Introduction - Phils Rockets
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Turbo Codes Introduction - Phils Rockets
Page 1 2000 Turbo Codes Introduction In 1949 Claude Shannon published a classic paper1 that established a mathematical basis for the consideration of the noisy communications channel. In his analysis he quantified the maximum theoretical capacity for a communications channel, the Shannon limit, and indicated that error-correcting channel Codes must exist that allowed this maximum capacity to be achieved. The intervening years have seen many well-considered channel Codes inch towards the Shannon limit, but all contenders have required large block lengths to perform close to the limit.
Page 2 © P.B.Charlesworth 2000 delay 1 + delay 3 delay 2 + x p 0 p 1 a) convolutional coder + + x p 1 x b) recursive systematic convolutional coder delay 1 delay
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