In 1993, scientists achieved the maximum rate for data transmission—only to find they’d been scooped 30 years earlier by an MIT grad student. The startling performance of turbo codes mobilized researchers to try to explain why they worked so well. Within a few years, investigation of iterative coding schemes had yielded a perhaps even more surprising result: a set of codes that worked at least as well as turbo codes had been around since 1960, when they were introduced in the MIT doctoral thesis of Robert Gallager. «more»

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Explained: Gallager codes

Professor Robert Gallager

RLE Communication and Network Group