期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：10
DOI：10.15680/IJIRCCE.2015.0310046
出版社：S&S Publications
摘要：Attenuation, d istortion, interference and no ise affect data transmission over wireless channels that influence the receiver's ability to receive correct information. Convolution codes are used in many communication systems because of their excellent error-control performance. A convolutional coding is done by co mbining the fixed number of inputs bits. The input bits are stored in the fixed length shift register and they are combined with the help of mod -2 adders. This operation is similar to binary convolution and hence it is known as convolutio n coding. Convolutional encoding with Viterbi decoding is a powerful method for forward error correction. The High -speed Viterbi decoders for convolutional codes are of great interest for high -data-rate applications. This proposal presents the convolution encoder and viterbi decoder for constraint length 9 and code rate 1/3. This design presents an efficient coding techniq ue for wireless communication, using VHDL. It is simulated and synthesized using Xilinx 13.2. The data stream is processed parallel with pipelined technique in the viterbi decoder. The parallel processed viterbi decoder with pipelining uses 3-bit soft decision decoding for the estimation of original data stream. In this dissertation the given input sequence that to be transmitted has been encoded by using convolutional encoder and received sequence is decoded by the high speed parallel Processed Viterbi decoder with pipelined technique and the estimated original sequence is produced. With the proposed design the po wer consumption is reduced nearly by 8% moreover speed of processing is increased
