This question is about the Hadamard code corresponding to the 16 × 16 Hadamard matrix created by Sylvester's Construction. Create a 5-digit number by writing the last five digits of your enrolment number. So for example, with enrolment number 000123456 I would create 23456. Now create a 5-bit message by converting each of these digits to the equivalent (mod 2), so even numbers are written as 0 and odd numbers as 1- here I would write 01010. If your message contains 1 or fewer 1s, make both the first and last bit into 1, so that you have a 5-bit message containing at least two 1s. (a) Write down the Hadamard matrix and say how the 32 codewords are obtained from it.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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my enrolment number Which is 001055536
3.
This question is about the Hadamard code corresponding to the 16 x 16 Hadamard
matrix created by Sylvester's Construction.
Create a 5-digit number by writing the last five digits of your enrolment number. So
for example, with enrolment number 000123456 I would create 23456. Now create a
5-bit message by converting each of these digits to the equivalent (mod 2), so even
numbers are written as 0 and odd numbers as 1- here I would write 01010. If your
message contains 1 or fewer 1s, make both the first and last bit into 1, so that you
have a 5-bit message containing at least two 1s.
(a)
Write down the Hadamard matrix and say how the 32 codewords are
obtained from it.
(b)
Write out the generating matrix and the decoding matrix for this code.
(c)
Carry out the matrix operations to encode your 5-bit message and to decode
the resulting codeword.
(d)
What is the distance of this code? What is its rate? How many errors can it
correct?
(e)
Give an example of a word which differs from your encoded message in as
many places as possible while still being nearer to your encoded message
than to any other codeword.
Transcribed Image Text:3. This question is about the Hadamard code corresponding to the 16 x 16 Hadamard matrix created by Sylvester's Construction. Create a 5-digit number by writing the last five digits of your enrolment number. So for example, with enrolment number 000123456 I would create 23456. Now create a 5-bit message by converting each of these digits to the equivalent (mod 2), so even numbers are written as 0 and odd numbers as 1- here I would write 01010. If your message contains 1 or fewer 1s, make both the first and last bit into 1, so that you have a 5-bit message containing at least two 1s. (a) Write down the Hadamard matrix and say how the 32 codewords are obtained from it. (b) Write out the generating matrix and the decoding matrix for this code. (c) Carry out the matrix operations to encode your 5-bit message and to decode the resulting codeword. (d) What is the distance of this code? What is its rate? How many errors can it correct? (e) Give an example of a word which differs from your encoded message in as many places as possible while still being nearer to your encoded message than to any other codeword.
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