DefinePK

Abstract

In present world, communication has pervaded into the life of every individual and therefore lot of research is being done towards achieving a seamless, high speed and reliable communication between various users. Through satellite communication, transmission of data is easily possible for different users positioned at various locations. In satellite communication, forward error correction scheme will have great impact when channel is noisy. The error correcting scheme of convolution codes will confide on constraint length and code generator. The convolution encoder and viterbi decoder with an appropriate design will provide better performance. In this paper the performance analysis of a satellite communication model has been undertaken with Quadrature Phase Shift Keying (QPSK) modulation scheme along with convolution coding technique having 1/2 and 1/3 rates. The performance has been analyzed with different constraint lengths, in terms of Bit Error Rate (BER), with respect to the Signal to Noise Ratio (SNR) for Additive White Gaussian Noise (AWGN) channel. The simulation has been undertaken in MATLAB / Simulink.