Preface to Fourth Edition

Keeping in tune to the changing needs of the curriculum of various Universities, this book has been comprehensively revised and fortified with the additional information.

The changes made over the previous editions are

1.The chapter on Digital Signal Processors is completely revised with addtional programs.

2.Over 40 new MATLAB programs are included over the existing 50 MATLAB programs

3. An appendix on Random processes is included

4. 200 additional solved problems are included.

5. Practice problems are given along with the respective topics.

6. Latest University question papers have been fully solved.

I request my teaching fraternity to provide suggestions for further improvement of the book.