Elements of algebraic coding systems / Valdemar Cardoso da Rocha, Jr.

Format:

Book

Author/Creator:

Cardoso da Rocha, Jr., Valdemar, author.

Series:

Communications and signal processing collection.

Communications and signal processing collection

Language:

English

Subjects (All):

Coding theory.

Physical Description:

1 online resource (208 p.)

Place of Publication:

New York : Momentum Press, LLC, [2014]

Language Note:

English

Summary:

This book serves as an introductory text to algebraic coding theory. The contents are suitable for final year undergraduate and first year graduate courses in electrical and computer engineering, and will give the reader knowledge of coding fundamentals that is essential for a deeper understanding of state-of-the-art coding systems. This book will also serve as a quick reference for those who need it for specific applications, like in cryptography and communications. Eleven chapters cover linear error-correcting block codes from elementary principles, going through cyclic codes and then covering some finite field algebra, Goppa codes, algebraic decoding algorithms, and applications in public-key cryptography and secret-key cryptography. At the end of each chapter a section containing problems and solutions is included. Three appendices cover the Gilbert bound and some related derivations, a derivation of the MacWilliams' identities based on the probability of undetected error, and two important tools for algebraic decoding, namely, the finite field Fourier transform and the Euclidean algorithm for polynomials.

Contents:

1. Basic concepts

1.1 Introduction

1.2 Types of errors

1.3 Channel models

1.4 Linear codes and non-linear codes

1.5 Block codes and convolutional codes

1.6 Problems with solutions

2. Block codes

2.1 Introduction

2.2 Matrix representation

2.3 Minimum distance

2.4 Error syndrome and decoding

2.4.1 Maximum likelihood decoding

2.4.2 Decoding by systematic search

2.4.3 Probabilistic decoding

2.5 Simple codes

2.5.1 Repetition codes

2.5.2 Single parity-check codes

2.5.3 Hamming codes

2.6 Low-density parity-check codes

2.7 Problems with solutions

3. Cyclic codes

3.1 Matrix representation of a cyclic code

3.2 Encoder with n - k shift-register stages

3.3 Cyclic Hamming codes

3.4 Maximum-length-sequence codes

3.5 Bose-Chaudhuri-Hocquenghem codes

3.6 Reed-Solomon codes

3.7 Golay codes

3.7.1 The binary (23, 12, 7) Golay code

3.7.2 The ternary (11, 6, 5) Golay code

3.8 Reed-Muller codes

3.9 Quadratic residue codes

3.10 Alternant codes

3.11 Problems with solutions

4. Decoding cyclic codes

4.1 Meggitt decoder

4.2 Error-trapping decoder

4.3 Information set decoding

4.4 Threshold decoding

4.5 Algebraic decoding

4.5.1 Berlekamp-Massey time domain decoding

4.5.2 Euclidean frequency domain decoding

4.6 Soft-decision decoding

4.6.1 Decoding LDPC codes

4.7 Problems with solutions

5. Irreducible polynomials over finite fields

5.1 Introduction

5.2 Order of a polynomial

5.3 Factoring xqn - x

5.4 Counting monic irreducible q-ary polynomials

5.5 The Moebius inversion technique

5.5.1 The additive Moebius inversion formula

5.5.2 The multiplicative Moebius inversion formula

5.5.3 The number of irreducible polynomials of degree n over GF(q)

5.6 Chapter citations

5.7 Problems with solutions

6. Finite field factorization of polynomials

6.1 Introduction

6.2 Cyclotomic polynomials

6.3 Canonical factorization

6.4 Eliminating repeated factors

6.5 Irreducibility of ̲[phi]n(x) over GF(q)

6.6 Problems with solutions

7. Constructing f-reducing polynomials

7.1 Introduction

7.2 Factoring polynomials over large finite fields

7.2.1 Resultant

7.2.2 Algorithm for factorization based on the resultant

7.2.3 The Zassenhaus algorithm

7.3 Finding roots of polynomials over finite fields

7.3.1 Finding roots when p is large

7.3.2 Finding roots when q = pm is large but p is small

7.4 Problems with solutions

8. Linearized polynomials

8.1 Introduction

8.2 Properties of L(x)

8.3 Properties of the roots of L(x)

8.4 Finding roots of L(x)

8.5 Affine q-polynomials

8.6 Problems with solutions

9. Goppa codes

9.1 Introduction

9.2 Parity-check equations

9.3 Parity-check matrix of Goppa codes

9.4 Algebraic decoding of Goppa codes

9.4.1 The Patterson algorithm

9.4.2 The Blahut algorithm

9.5 The asymptotic Gilbert bound

9.6 Quadratic equations over GF(2m)

9.7 Adding an overall parity-check digit

9.8 Affine transformations

9.9 Cyclic binary double-error correcting

10. Extended Goppa codes

9.10 Extending the Patterson algorithm for decoding Goppa codes

9.11 Problems with solutions

10. Coding-based cryptosystems

10.1 Introduction

10.2 McEliece's public-key cryptosystem

10.2.1 Description of the cryptosystem

10.2.2 Encryption

10.2.3 Decryption

10.2.4 Cryptanalysis

10.2.5 Trapdoors

10.3 Secret-key algebraic coding systems

10.3.1 A (possible) known-plaintext attack

10.3.2 A chosen-plaintext attack

10.3.3 A modified scheme

10.4 Problems with solutions

11. Majority logic decoding

11.1 Introduction

11.2 One-step majority logic decoding

11.3 Multiple-step majority logic decoding I

11.4 Multiple-step majority logic decoding II

11.5 Reed-Muller codes

11.6 Affine permutations and code construction

11.7 A class of one-step decodable codes

11.8 Generalized Reed-Muller codes

11.9 Euclidean geometry codes

11.10 Projective geometry codes

11.11 Problems with solutions

Appendices

A. The Gilbert bound

A.1. Introduction

A.2. The binary asymptotic Gilbert bound

A.3. Gilbert bound for linear codes

B. MacWilliams' identity for linear codes

B.1. Introduction

B.2. The binary symmetric channel

B.3. Binary linear codes and error detection

B.4. The q-ary symmetric channel

B.5. Linear codes over GF(q)

B.6. The binomial expansion

B.7. Digital transmission using N regenerative repeaters

C. Frequency domain decoding tools

C.1. Finite field Fourier transform

C.2. The Euclidean algorithm

Bibliography

About the author

Index.

Notes:

Description based upon print version of record.

Includes bibliographical references and index.

Description based on print version record.

ISBN:

1-60650-575-0

OCLC:

885199308

Publisher Number:

10.5643/9781606505755