Abstract
This study presents a low-complexity soft-interference cancellation equalizer (SICE) for the turbo detection of multiple-input-multiple-output systems operating in time dispersive channels. The SICE contains three time-invariant linear filters: a feedforward filter, a causal feedback filter and an anti-causal feedback filter. The feedforward filter is designed to suppress the InterSymbol interference because of channel time dispersion and the multiplexing interference from multiple transmit antennas. The causal (or anti-causal) feedback filter is developed to remove the residual interference caused by the symbols transmitted before (or after) the symbol under detection. The filters are designed by analyzing the statistical properties of soft decisions. The performance of the proposed SICE is verified through both extrinsic information transfer (EXIT) chart analysis and computer simulations. The EXIT chart analysis shows that, because of the inclusion of the anti-causal soft decision, the SICE performance approaches the ideal matched filter bound as the iteration progresses. Consequently, the proposed SICE achieves significant performance gains over conventional equalizers.
Recommended Citation
J. Wu et al., "Low-complexity Soft-interference Cancellation Turbo Equalisation for Multi-input-multi-output Systems with Multilevel Modulations," IET Communications, vol. 9, no. 5, pp. 728 - 735, Wiley Open Access; Institution of Engineering and Technology (IET), Mar 2015.
The definitive version is available at https://doi.org/10.1049/iet-com.2014.0396
Department(s)
Electrical and Computer Engineering
Publication Status
Free Access
International Standard Serial Number (ISSN)
1751-8628
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
26 Mar 2015
