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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.
The UltraTec company implements another protocol known as Enhanced TTY, which it calls "Turbo Code," in its products. Turbo Code has some advantages over Baudot protocols, such as a higher data rate, full ASCII compliance, and full-duplex capability. However, Turbo Code is proprietary, and UltraTec gives its specifications only to parties who ...
Turbo codes were invented by Claude Berrou in 1990–1991. In 1993, turbo codes were introduced publicly via a paper listing authors Berrou, Glavieux, and Thitimajshima. [2] In 1995 a novel extension of the turbo principle was applied to an equalizer by Douillard, Jézéquel, and Berrou. [3]
LDPC codes have no limitations of minimum distance, [35] 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). [36] [37]
Coined the term "digital". Discovered the reflected binary code known as Gray code. Excess-3 code is named after him as well (Stibitz code). 1982 Stonebraker, Michael: Revolutionized the field of database management systems (DBMSs) and founded multiple successful database companies 1979 Stroustrup, Bjarne: Invented C++ at Bell Labs 1963 ...