# COMPLEXITY ANALYSIS OF A HYBRID THRESHOLD-BASED ZF-MMSE EQUALIZER FOR SIC-BASED MIMO-OFDM RECEIVERS

### Nikolaos I. Miridakis, Dimitrios D. Vergados

#### Abstract

In this paper, we propose a new reception scheme for MIMO-OFDM systems, which can switch between two different equalization methodologies, accordingly, on a subcarrier basis. In fact, the proposed receiver is based on the ordered successive interference cancellation (SIC) technique and uses jointly zero forcing SIC (ZF-SIC) and minimum mean squared error SIC (MMSE-SIC) according to a defined threshold value. The modulation scheme considered in this study is QPSK. Our main objective, here, is the provision of the computational complexity efficiency. Hence, a complexity analysis is provided and upper and lower complexity bounds for the proposed scheme are also derived.

#### References

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#### Paper Citation

#### in Harvard Style

I. Miridakis N. and D. Vergados D. (2011). **COMPLEXITY ANALYSIS OF A HYBRID THRESHOLD-BASED ZF-MMSE EQUALIZER FOR SIC-BASED MIMO-OFDM RECEIVERS** . In *Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2011)* ISBN 978-989-8425-73-7, pages 109-112. DOI: 10.5220/0003614101090112

#### in Bibtex Style

@conference{winsys11,

author={Nikolaos I. Miridakis and Dimitrios D. Vergados},

title={COMPLEXITY ANALYSIS OF A HYBRID THRESHOLD-BASED ZF-MMSE EQUALIZER FOR SIC-BASED MIMO-OFDM RECEIVERS},

booktitle={Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2011)},

year={2011},

pages={109-112},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0003614101090112},

isbn={978-989-8425-73-7},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2011)

TI - COMPLEXITY ANALYSIS OF A HYBRID THRESHOLD-BASED ZF-MMSE EQUALIZER FOR SIC-BASED MIMO-OFDM RECEIVERS

SN - 978-989-8425-73-7

AU - I. Miridakis N.

AU - D. Vergados D.

PY - 2011

SP - 109

EP - 112

DO - 10.5220/0003614101090112