Analysis of numerical interleaver for IDMA scheme

Abstract

This research work presents a novel numerical interleaver for generation of user specific interleaving sequences, for interleave-division multiple-access (IDMA) system. In general, all the interleaving sequences, used by users, need to be transferred to receiver side for extracting the user specific data with help of de-interleaving process. In the proposed interleaver, there is no need to transfer any interleaving sequences to the receiver. This interleaver eliminates the problem of high consumption of bandwidth as the interleaved sequences depend only on few parameters and it can be easily generated at the receiver if receiver system is aware of these parameters. To make comparison with other interleavers, the bit error rate (BER) performance analysis has been performed under Additive White Gaussian Noise (AWGN) channel conditions based on the computer MATLAB simulations. The simulation results demonstrate that the proposed numerical interleaver provides better BER performance since it allows the communication system to easily check for more orthogonal interleaving patterns by changing the values of few parameters.