The Definition of codes used in the communication systems and computers analysis

Removal of the errors caused by the noise in transmission channel in digital communication systems is an important problem. There are two basic systems to remove problem. These are Automatic Repeat Systems and Forward Error Correction Systems. The purpose in these two systems is to correct the errors by finding them. In this thesis it is dealt with how to form a complex coding, decoding algorithm for high bit error probability values from the transmission channel and how to detect and correct the errors to come. It is also deals with the introduction of coding systems to succeed this algorithm and analysis with the help of a programmer in the language of C. Linear codes used in data transmission, BCH codes and Reed-Solomon codes have been analyzed for this aim. With the help of the computer simulation the processes of coding, decoding and error correction are done according to the entered parameters. By using to these processes codes are compared and emphasis is given to how more reliable coding and decoding systems should be. Science Code : Electrical and Electronics Engineering Key words : Communications, Codes, Information Number of Pages : 98 The Director is Thesis : Yrd. Doç. Dr. Cem NAKÎBO?LU