Modern Codes: LDPC, Polar and Turbo

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Each question is graded on a single answer: a check that this chapter's methods work, not a test of the reasoning behind them.

A ⁠-regular LDPC code has block length ⁠. How many parity-check equations (rows of ⁠) does it have?

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The sparse-graph and polarization constructions that finally reach capacity in practice, and how they are decoded. This set covers the chapter Modern Codes: LDPC, Polar and Turbo in Information Theory: 33 easy, 51 medium and 26 hard questions, each graded instantly with a hint and a full step-by-step solution. Progress is saved in this browser only.