Chapter 16: Q9E (page 481)
Show that 1 X 4 standard generator matrixgenerates the code in Example 1.
Short Answer
The standard generator matrix generates the code and .
Chapter 16: Q9E (page 481)
Show that 1 X 4 standard generator matrixgenerates the code in Example 1.
The standard generator matrix generates the code and .
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Get started for freeProve that is irreducible in . [Hint: Exercise 2 and Theorem 4.16]
Prove that an element ofis a codeword in the parity-check code(Example 2) if the sum of its digits is0. [Hint: Compare the sum of the firstfive digits with the sixth digit.]
Question 11: Let be a finite field of order , whose multiplicative group is generated by . For each i, let be the polynomial of over . If , prove that each divides data-custom-editor="chemistry" . [Hint: (Why?) Use theorem 11.6]
Complete the proof of Theorem 16.2 by showing that if a code corrects errors, then the Hamming distance between any two codewords is at least . [Hint: If u, v are codewords with , obtain a contradictionby constructing a word w that differs from u in exactly t coordinates and from v in tor fewer coordinates; see Exercise 14.]
Question 12: If is a generator polynomial of a BCH code in , prove that divides . [Hint: Exercises 11 and 8(b).]
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