Iterative Interference Cancellation for Multi-Carrier Modulation in MIMO-DWT Downlink Transmission

Yahya Harbi; ALI AL-JANABI; Hayder Almusa; Marwa Chafii; Alister Burr

doi:10.18080/jtde.v9n4.426

Yahya Harbi

University of Kufa

Ali K. Aljanabi

University of Kufa

Hayder Almusa

University of Kufa

Marwa Chafii

ENSEA

Alister Burr

University of York

Keywords

MIMO-DWT, IIC, conventional OFDM, LDPC, interative decoder

Abstract

The Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) scheme represents the dominant radio interface for broadband multicarrier communication systems. However, with insufficient Cyclic Prefixes (CP), Inter-Symbol Interference (ISI) and Inter-Carrier Interference (ICI) occur due to the time-varying multipath channel. This means that the performance of the system will be degraded. In this paper, we investigate the interference problem for a MIMO Discrete Wavelet Transform (MIMO-DWT) system under the effect of the downlink LTE channel. A Low-Density Parity-Check (LDPC) decoder is used to estimate the decoded signal. The proposed iterative algorithm uses the estimated decoded signal to compute the components required for ICI/ISI interference reduction. In this paper, Iterative Interference Cancellation (IIC) is employed to mitigate the effects of interference that contaminates the received signal due to multiple antenna transmission and a multipath channel. An equalizer with minimum mean square error is considered. We compare the performance of our proposed algorithm with the traditional MIMO-OFDM scheme in terms of bit error probability under insufficient CP. Simulation results verify that significant improvements are achieved by using IIC and MIMO-IIC for both systems.

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426-PDF-v9n4pp75-87

Published

Dec 5, 2021

DOI https://doi.org/10.18080/jtde.v9n4.426

How to Cite

Harbi, Y., AL-JANABI, A., Almusa, H., Chafii, M., & Burr, A. (2021). Iterative Interference Cancellation for Multi-Carrier Modulation in MIMO-DWT Downlink Transmission. Journal of Telecommunications and the Digital Economy, 9(4), 75–87. https://doi.org/10.18080/jtde.v9n4.426