Efficient Convolutional Code Algorithm for Concatenated RS- CC Codes in Multipath Environment

In the wireless communication, the error detection and correction techniques are widely used to achieve higher transmission efficiency. While transmitting the data, some coding techniques are deployed that provides the coding gain depending on its error correcting capability. Coding gain allows the wireless communication at lower transmit power level while maintaining low BER. Reed Solomon – Convolution concatenated coding technique provides significant improvement in case of burst and bit errors. In a convolutional encoder, for a constraint length of 7 and code rate of 1⁄2, the generator polynomial mentioned in the available literature are given by G1 = 171OCT, G2 = 133OCT. The aim of the paper is to design an efficient algorithm for convolution encoder that offers better error correcting capability, leading to lower BER. For the purpose a set of generator polynomial has been proposed and bit error rate has been simulated for different channels and different modulation techniques. Keywords— BER, code rate, constraint length, Convolution, error correction, reed solomon