Title         : Safety data transmission

Supervisor : Prof. Vinod Chandra,  Dept. of Electrical Engineering,    Indian Institute of Technology

                  Delhi,

        A new error coding technique has been investigated in which error can be corrected using cyclic redundancy code (CRC).  The proposed technique has been demonstrated by experiment. Error coding techniques using CRC have the advantages over other error coding techniques. CRC have fair amount of the mathematical structure that permit the design of higher order correcting code. CRC cane be described in polynomial form. The generator polynomial and syndrome have been used to detect and correct the error. Syndrome is the reminder of division of received data. This syndrome is generated by generator polynomial. If syndrome is zero then there is no error in the received data and if syndrome is nonzero then there is an error in the received data.

Proposed technique

  Passing the input data bits through encoder. Data bits have been converted into CRC bits after passing through encoder. CRC bits have been added with these data bits. The combined bits assign through the decoder. Determine the syndrome for the output of the decoder.

Experimental work

  Experimental results have been presented to verify the validity of the proposed technique. The experiments have been performed by designing the electronic circuits on hardware.

v  Encoding and syndrome calculation have been performed on hardware using shift register (IC7495).

Encoder and decoder for particular generator polynomial have been design on hardware.