Effect of channel estimation error on the performance of interleave-division multiple access systems
ICACT'09 Proceedings of the 11th international conference on Advanced Communication Technology - Volume 3
International Journal of Interdisciplinary Telecommunications and Networking
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The interleave division multiple access (IDMA) relies on the interleavers as the only means to separate users. In this paper, we analyze the multiple access interference (MAI) performance of interleavers and propose a new design method for interleavers with lower complexity and less memory consumption: shifting interleavers. A series of interleavers can be generated by circular shifting a specific pseudo noise (PN) interleaver, which is generated by a PN sequence generator. Thus, the architecture of the proposed interleaver is much simpler than that of other interleaver schemes for IDMA systems. The simulation results show that shifting interleavers can achieve the same performance with much less resource consumption compared to random interleavers in the IDMA systems. Index Terms----IDMA, primitive polynomial, orthogonal interleavers, shifting interleavers.