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Comparative Study of LDPC and Viterbi Decoder

Author(s):

ASHIMA SOOD , PUNJAB ENGINEERING COLLEGE(PEC),CHANDIGARH; Shubham singh, PEC, Chandigarh; Nagendra Sah, PEC, Chandigarh

Keywords:

LDPC, Viterbi Decoder, communication system , VLSI, Viterbi algorithm .

Abstract

The main concern in any communication system is the reliable transmission of signals of information from a transmitter to a receiver. The signals are transmitted via a channel which corrupts the signal. It is necessary that the distorting effects of channel and noise are minimized and that the information sent through the channel in any given time is maximized. Channel coding techniques are employed to do this. In this paper we discuss the different decoders used to decode the channel encoded data.VLSI implementation complexity of a low density parity check (LDPC) decoder is heavily affected by the inter-connect and the storage requirements.. Several structured properties of LDPC codes and decoding algorithms are observed and are used to construct hardware implementation with reduced processing complexity.Another technique, known as Convolutional encoding is used for correction of errors at the receiver end .Convolutional codes protects information by adding redundant bits to the binary data. Viterbi decoding is the technique for decoding the Convolutional codes. The Viterbi algorithm estimates the maximum likelihood path through a trellis based on received symbols.

Other Details

Paper ID: IJSRDV2I3499
Published in: Volume : 2, Issue : 3
Publication Date: 01/06/2014
Page(s): 1492-1493

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