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The first class of turbo code was the parallel concatenated convolutional code (PCCC). Since the introduction of the original parallel turbo codes in 1993, many other classes of turbo code have been discovered, including serial concatenated convolutional codes and repeat-accumulate codes. Iterative turbo decoding methods have also been applied ...
His current research activities are now concentrated on the application and extension of the turbo technology in various domains, including his research on artificial thinking, because turbo decoding has been recognized as a new instance of the very general principle of belief propagation; one application of this principle has been invented for the decoding of low-density parity-check codes ...
Recursive systematic convolutional codes were invented by Claude Berrou around 1991. These codes proved especially useful for iterative processing including the processing of concatenated codes such as turbo codes. [1]
Turbo coding is an iterated soft-decoding scheme that combines two or more relatively simple convolutional codes and an interleaver to produce a block code that can perform to within a fraction of a decibel of the Shannon limit. Predating LDPC codes in terms of practical application, they now provide similar performance.
LDPC codes have no limitations of minimum distance, [34] that indirectly means that LDPC codes may be more efficient on relatively large code rates (e.g. 3/4, 5/6, 7/8) than turbo codes. However, LDPC codes are not the complete replacement: turbo codes are the best solution at the lower code rates (e.g. 1/6, 1/3, 1/2). [35] [36]
He was the coinventor with Claude Berrou and Punya Thitimajshima of a groundbreaking coding scheme called turbo codes. Glavieux received the Golden Jubilee Award for Technological Innovation from the IEEE Information Theory Society together with Berrou and Thitimajshima in 1998, [ 1 ] the IEEE Richard W. Hamming Medal together with Berrou in ...
Alfred Büchi. Alfred Büchi (July 11, 1879 – October 27, 1959) was a Swiss engineer and inventor.He was best known as the inventor of turbocharging.Büchi was born July 11, 1879, in Winterthur, Switzerland, growing up there and in Ludwigshafen.
For example, an overall code rate of 1/2 may be achieved by puncturing the outer convolutional code to rate 3/4 and the inner convolutional code to rate 2/3. A recursive inner convolutional code is preferable for turbo decoding of the SCCC. The inner code may be punctured to a rate as high as 1/1 with reasonable performance.