A Survey on Various Interleavers in Iterative IDMA Communication System

The Code-Division Multiple-Access (CDMA) scheme is well established mechanism for sharing of bandwidth however its performance is mainly limited by multiple access interference (MAI) and inter-symbol interference (ISI). Newly proposed Interleave division multiple access (IDMA) scheme has established its position for a potential candidate for 4th generation wireless communication systems. It combines the advantage of chip level user-specific interleavers with iterative chip-by-chip (CBC) multiuser detection (MUD) for spread spectrum communication. IDMA not only inherits all the advantages of CDMA but also has the capability to overcome its deficiencies. The number of various interleavers has been proposed by researchers to meet the future requirements in IDMA communication system. All the proposed interleavers shares certain merits and demerits over one another and still the scope for proposal of most optimum interleaver for IDMA systems is open for researchers. In this paper, various interleavers have been reviewed for this advanced multiple access scheme