Simulation of OFDM-IDMA with Modified Circular Shift Interleaver amidst Coding and Uncoding Environment

摘要

OFDM-IDMA is a hybrid scheme which uses the merits of orthogonal and non orthogonal schemes where OFDM is an orthogonal approach and IDMA is a non orthogonal approach to overcome the drawbacks of 3G networks. In OFDM-IDMA, the users are distinguished by using unique interleaver pattern. This paper intimates the performance of deterministic interleaver namely modified circular shift interleaver in the presence of Forward Error Correcting code and in their absence. The BER Vs E_b/N_0 analysis is carried out and code efficiency comparison is done among baseband and higher modulation schemes.