Bit Error Rate (BER) Performance Enhancement for Wireless Communication System Using Modified Turbo Codes

摘要

In wireless communication, turbo and modified turbo codes are used as forward error correction (FEC) codes to improve the performance of the system in terms of bit error rate (BER). This work revisits the FEC using conventional turbo codes and proposes few modifications in them to obtain modified turbo codes. Trivial alterations in the frame length of the codes have been implemented along with puncturing scheme. The decoding complexity of the system is alleviated with the use of Viterbi algorithm for punctured codes. A comparative study between the performance of the system using turbo and modified turbo codes is presented in terms of their BER. Simulation results show that there is significant enhancement in the performance of the system when modified turbo codes are employed.