TITLE:
Triple-Polarized Multi-User Mimo-Idma System under Correlated Fading Channel
AUTHORS:
B. Partibane, V. Nagarajan
KEYWORDS:
Interleave Division Multiple Access (IDMA), Multiple Input Multiple Output (MIMO), Multi-User Interference (MUI), Stanford University Interim (SUI) Channel Model, Long Term Evolution (LTE) Channel Model
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.8,
June
16,
2016
ABSTRACT: A multiple-input
multiple-output interleave division multiple access (MIMO-IDMA) system withTriple Polarized Division Multiplexing
(TPDM) is presented in this paper. The present methodology replaces three
independent linearly polarized antennas with a single triple polarized antenna
at both the transmitter and receiver. The users in the communication link are
accommodated and separated using a user-specific interleaver combined with low
rate spreading sequence. To eliminate the effects of multi-stream interference
(MSI), minimum mean square error (MMSE) algorithm based on successive
interference cancellation (SIC) Multi-user detection (MUD) technique is
employed at the receiver. Furthermore, log-maximum a posteriori probability
(MAPP) decoding algorithm is implemented at the mobile stations (MSs) to overcome
the effects of multi-user interference (MUI) effects. The paper also evaluates
the effects of coded MIMO-IDMA in the downlink communication by adopting the
Stanford University Interim (SUI) and Long-term Evolution (LTE)channel model
specifications. In comparison with the traditional uncoded system, the presentsolution considering turbo coded
triple-polarized MIMO-IDMA system with iterative decoding algorithm provides
better bit error rate (BER) with reduced signal to noise ratio (SNR). The
simulation results also show that though the SNR requirement is higher for the
proposed technique compared to the conventional uni-polarized antenna based
MIMO-IDMA system, it gives the advantages of achieving higher data rate with
reduced cost and space requirements in the context of a downlink (DL).