Problem statement:This study presents the performance analysis of multi-user Multi Input Multi Output (MIMO) assisted interleave based multiple-access system. In IDMA, different interleavers are used to distinguish users as against different signature sequence in a conventional code-Division Multiple-Access (CDMA) scheme. Approach: The basic principle of IDMA is that the interleaver is unique for the users. Results: In this study, we consider that Interleavers are generated independently and randomly. . Also the IDMA technique is extended to multi user MIMO IDMA with multi-user detection. At the receiver, OSIC detector is realized using ZF for frequency fading channel to combat MAI and MUI problem. The performance of the system is analyzed for different channel conditions using extensive simulation runs based on Monte Carlo simulation trials. Conclusion: It is shown that the IDMA scheme can achieve near single user performance in situations with very large numbers of users while maintaining very low receiver complexity. It is discerned from the computer simulation results that IDMA outperforms CDMA in frequency selective channel for high load conditions.
Problem statement: This study presents the performance analysis of turbo assisted Interleave
Division Multiple-Access (IDMA) system with Multi Input Multi Output (MIMO) support for multi user
scenario over correlated frequency selective and uncorrelated frequency selective channel. Approach:
The key principle of IDMA is that interleaver unique which distinguishes the users in contrast to
spreading sequence in Code Division Multiple Access System (CDMA). Results: In this work, we
assume that Interleavers are generated independently and randomly. At the receiver, we employed
Ordered SIC (OSIC) technique using ZF and MMSE criterion to combat Inter Antenna Interference (IAI)
and Multi User Interference (MUI) problem along with iterative decoding to improve the performance in
terms of BER. The performance of system has been discussed for different channel conditions with
realistic channel model using extensive simulation runs based on Monte Carlo simulation trials. We have
exhibited the flexibility and robustness provided by MIMO-IDMA. Conclusion/Recommendations: It
has been proved from the results that IDMA principle can be applied to realize many potential
performance gains highlighted by information theory, including coding gain multiplexing gain and multiuser
gain. Simulation results presented to demonstrate the benefits of IDMA with MUD and iterative
decoding. It is discerned that IDMA performs better than CDMA in frequency selective channel for high
load conditions which is assessed through computer simulation results.
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