Performance of overloaded MIMO-OFDM system with repetition code

Hikari Matsuoka; Yoshihito Doi; Tatsuro Yabe; Yukitoshi Sanada

doi:10.1109/ISPACS.2014.7024460

Performance of overloaded MIMO-OFDM system with repetition code

Hikari Matsuoka, Yoshihito Doi, Tatsuro Yabe, Yukitoshi Sanada

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

This paper investigates the performance of an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with a repetition code. It has been demonstrated that diversity with block coding prevents the performance degradation induced by signal multiplexing. However, the computational complexity of a joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes the use of a repetition code in the overloaded MIMO-OFDM system. In addition, QR decomposition with M-algorithm (QRM) maximum likelihood decoding (MLD) is applied to the decoding of the repetition code. QRM-MLD significantly reduces the amount of joint decoding complexity. In addition, virtual antennas are employed in order to increase the throughput that is reduced by the repetition code. It is shown that the proposed scheme reduces the complexity by about 1/48 for 6 signal streams with QPSK modulation while the BER degradation is less than 0.ldB at the BER of 10^-3.

Original language	English
Title of host publication	2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	239-244
Number of pages	6
ISBN (Print)	9781479961207
DOIs	https://doi.org/10.1109/ISPACS.2014.7024460
Publication status	Published - 2014 Jan 27
Event	2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014 - Kuching, Sarawak, Malaysia Duration: 2014 Dec 1 → 2014 Dec 4

Other

Other	2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014
Country/Territory	Malaysia
City	Kuching, Sarawak
Period	14/12/1 → 14/12/4

ASJC Scopus subject areas

Artificial Intelligence
Computer Networks and Communications
Signal Processing

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10.1109/ISPACS.2014.7024460

Cite this

Performance of overloaded MIMO-OFDM system with repetition code. / Matsuoka, Hikari; Doi, Yoshihito; Yabe, Tatsuro et al.

2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014. Institute of Electrical and Electronics Engineers Inc., 2014. p. 239-244 7024460.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Matsuoka, H, Doi, Y, Yabe, T & Sanada, Y 2014, Performance of overloaded MIMO-OFDM system with repetition code. in 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014., 7024460, Institute of Electrical and Electronics Engineers Inc., pp. 239-244, 2014 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2014, Kuching, Sarawak, Malaysia, 14/12/1. https://doi.org/10.1109/ISPACS.2014.7024460

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abstract = "This paper investigates the performance of an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with a repetition code. It has been demonstrated that diversity with block coding prevents the performance degradation induced by signal multiplexing. However, the computational complexity of a joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes the use of a repetition code in the overloaded MIMO-OFDM system. In addition, QR decomposition with M-algorithm (QRM) maximum likelihood decoding (MLD) is applied to the decoding of the repetition code. QRM-MLD significantly reduces the amount of joint decoding complexity. In addition, virtual antennas are employed in order to increase the throughput that is reduced by the repetition code. It is shown that the proposed scheme reduces the complexity by about 1/48 for 6 signal streams with QPSK modulation while the BER degradation is less than 0.ldB at the BER of 10-3.",

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N2 - This paper investigates the performance of an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with a repetition code. It has been demonstrated that diversity with block coding prevents the performance degradation induced by signal multiplexing. However, the computational complexity of a joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes the use of a repetition code in the overloaded MIMO-OFDM system. In addition, QR decomposition with M-algorithm (QRM) maximum likelihood decoding (MLD) is applied to the decoding of the repetition code. QRM-MLD significantly reduces the amount of joint decoding complexity. In addition, virtual antennas are employed in order to increase the throughput that is reduced by the repetition code. It is shown that the proposed scheme reduces the complexity by about 1/48 for 6 signal streams with QPSK modulation while the BER degradation is less than 0.ldB at the BER of 10-3.

AB - This paper investigates the performance of an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with a repetition code. It has been demonstrated that diversity with block coding prevents the performance degradation induced by signal multiplexing. However, the computational complexity of a joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes the use of a repetition code in the overloaded MIMO-OFDM system. In addition, QR decomposition with M-algorithm (QRM) maximum likelihood decoding (MLD) is applied to the decoding of the repetition code. QRM-MLD significantly reduces the amount of joint decoding complexity. In addition, virtual antennas are employed in order to increase the throughput that is reduced by the repetition code. It is shown that the proposed scheme reduces the complexity by about 1/48 for 6 signal streams with QPSK modulation while the BER degradation is less than 0.ldB at the BER of 10-3.

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Performance of overloaded MIMO-OFDM system with repetition code

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