Performance of overloaded MIMO-OFDM system with repetition code

Matsuoka, Hiroaki; Doi, Yoshihiro; Yabe, Tatsuro; Sanada, Yukitoshi

doi:10.1109/ispacs.2014.7024460

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Overloaded MIMO, that permits the more signal streams multiplexing than receive antennas, is an approach to achieve much higher speed transmission for downlink without huge number of reception antennas. Joint detection and decoding for repetition-coded overloaded MIMO-OFDM is proposed in [57]. The transmitted signal stream is encoded by a repetition code and the spatially multiplexed signals are jointly decoded after joint MLD in the receiver.…”

Section: Multi-antenna Technologiesmentioning

confidence: 99%

Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan

Murata

Okamoto

Mikami

et al. 2016

IEICE Trans. Commun.

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SUMMARY As the demand for higher transmission rates and spectral efficiency is steadily increasing, the research and development of novel mobile communication systems has gained momentum. This paper focuses on providing a comprehensive survey of research and development activities on fifth generation mobile communication systems in Japan. We try to survey a vast area of wireless communication systems and the developments that led to future 5G systems.

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Section: Multi-antenna Technologiesmentioning

confidence: 99%

Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan

Murata

Okamoto

Mikami

et al. 2016

IEICE Trans. Commun.

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“…The joint decoding scheme for overloaded MIMO systems with error correction codes has been investigated [9]- [11]. If fading statistics among coded symbols are independent, the error rate approaches to a lower bound through frequency diversity on multipath channels.…”

Section: Introductionmentioning

confidence: 99%

Open-Loop Correlation Reduction Precoding in Overloaded MIMO-OFDM Systems

Matsuoka

Doi

Yabe

et al. 2015

2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall)

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This paper proposes an open-loop correlation reduction precoding scheme for overloaded multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In overloaded MIMO-OFDM systems, frequency diversity through joint maximum likelihood (ML) decoding suppresses performance degradation owing to spatial signal multiplexing. However, on a line-of-sight (LOS) channel, a channel matrix may have a large correlation between coded symbols transmitted on separate subcarriers. The correlation reduces the frequency diversity gain and deteriorates the signal separation capability. Thus, in the proposed scheme, open-loop precoding in order to reduce the correlation between codewords transmitted on different signal streams is employed at the transmitter of an overloaded MIMO system. The proposed precoding scheme changes the amplitude as well as the phase of the coded symbols transmitted on different subcarriers. Numerical results obtained through computer simulation show that the proposed scheme improves the bit error rate performance on Rician channels.

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