Unequal error protection coded Interleave Division Multiple Access

Abstract

The performance of Interleave Division Multiple Access (IDMA) with a new set of low rate convolution codes is evaluated on Additive White Gaussian Noise (AWGN) channel. Despite the excessive multiuser interference, very good performance close to theoretical limit is demonstrated. The effect of varying number of users, code rate and channel characteristics on the performance is investigated. The proposed scheme offers significant complexity reduction when compared to the ones available in literature. In this work, we propose an unequal error protection code for IDMA (UEP-CIDMA) and compare its performance with the coded and uncoded IDMA system under various data bit streams. It was shown by simulations that the proposed code provides a tradeoff between cost and complexity compared with coded IDMA being the upper and lower bounds respectively, in addition to simulation for various data bit stream of convolutional encoder with different rates are 1/2 and 2/3.