Performance Boosting in IDMA System Using Helical Interleaver and Gold Codes

In Interleave Division Multiple Access (IDMA) scheme, interleavers have significant importance in the performance of whole system. In recent years interleavers have been proved to give the best performance in terms of data security and noise immunity, but huge memory requirement and complexity are major concerns for specifying the interleaver pattern. A new helical interleaver based IDMA system has already proposed due to some distinct advantages such as low system complexity and significant reduction in memory requirement as well. In this paper the performance of layer specific helically interleaved IDMA (HIDMA) system has been compared to randomly interleave and tree based IDMA with BPSK coding and with Gold Codes. Evaluation is done on the basis of mathematics and results are simulated in MATLAB.