Effect of Wireless Channel Parameters on Performance of Turbo Codes

Nabeel Arshad, Muhammad Ali Jamal, Dur E Tabish, Saqib Saleem


For large block lengths, turbo codes offer reticent decoding complexity as compared with the other codes. In this paper, performance of turbo codes is evaluated. Two algorithms which have been used are RSC encoder for encoding and Viterbi Algorithm for decoding. Simulations are conducted on MATLAB using BPSK and QPSK modulation schemes. Our main objective is to compare the performance of turbo codes using soft decision and hard decision decoding and also for different code rates in terms of BER. Similarly, it is also shown that with the help of turbo codes, the performance for multipath fading channel can be improved. To check the performance and complexity, channel impulse Response (CIR) and channel taps are used.


Recursive Systematic Convolutional Viterbi Algorithm; Soft decision; Hard Decision; Channel Impulse Response; Channel Taps

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