Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding

Ilmiawan Shubhi; Yukitoshi Sanada

doi:10.1109/PIMRC.2014.7136195

Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding

Ilmiawan Shubhi, Yukitoshi Sanada

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

3 Citations (Scopus)

Abstract

In order to support high data rate communications, the third generation partnershIP project (3GPP) long term evolution (LTE) implements multIPle-input multIPle-output (MIMO) systems. In addition, to achieve excellent performance, LTE also employs turbo codes as the forward error correcting (FEC) standard. Although conventional turbo codes give satisfactory performance in the ideal MIMO, significant performance degradation occurs in an overloaded MIMO system when the number of transmit antennas is larger than the number of receive antennas. This paper proposes a joint decoding scheme for turbo codes in overloaded MIMO-OFDM systems. In joint turbo decoding, the calculations of soft information are based on the bit combinations from all of streams. In addition, a super-trellis diagram is used to combine the trellis diagrams. Numerical results obtained through computer simulation show that the proposed scheme achieves better performance by 2.0dB for 4 transmit antennas and 2 receive antennas in the BER of 10^-5. The proposed scheme also achieves throughput improvement with the ratio close to the theoretical overloaded MIMO capacity.

Original language	English
Title of host publication	IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	386-390
Number of pages	5
Volume	2015-June
ISBN (Print)	9781479949120
DOIs	https://doi.org/10.1109/PIMRC.2014.7136195
Publication status	Published - 2015 Jun 25
Event	2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014 - Washington, United States Duration: 2014 Sept 2 → 2014 Sept 5

Other

Other	2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014
Country/Territory	United States
City	Washington
Period	14/9/2 → 14/9/5

Keywords

Joint Decoding
Joint Turbo Decoding
Overloaded MIMO-OFDM
Spatial MultIPlexing Modulation
Turbo Codes

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/PIMRC.2014.7136195

Cite this

Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding. / Shubhi, Ilmiawan; Sanada, Yukitoshi.

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. Vol. 2015-June Institute of Electrical and Electronics Engineers Inc., 2015. p. 386-390 7136195.

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

Shubhi, I & Sanada, Y 2015, Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding. in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. vol. 2015-June, 7136195, Institute of Electrical and Electronics Engineers Inc., pp. 386-390, 2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014, Washington, United States, 14/9/2. https://doi.org/10.1109/PIMRC.2014.7136195

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AB - In order to support high data rate communications, the third generation partnershIP project (3GPP) long term evolution (LTE) implements multIPle-input multIPle-output (MIMO) systems. In addition, to achieve excellent performance, LTE also employs turbo codes as the forward error correcting (FEC) standard. Although conventional turbo codes give satisfactory performance in the ideal MIMO, significant performance degradation occurs in an overloaded MIMO system when the number of transmit antennas is larger than the number of receive antennas. This paper proposes a joint decoding scheme for turbo codes in overloaded MIMO-OFDM systems. In joint turbo decoding, the calculations of soft information are based on the bit combinations from all of streams. In addition, a super-trellis diagram is used to combine the trellis diagrams. Numerical results obtained through computer simulation show that the proposed scheme achieves better performance by 2.0dB for 4 transmit antennas and 2 receive antennas in the BER of 10-5. The proposed scheme also achieves throughput improvement with the ratio close to the theoretical overloaded MIMO capacity.

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Performance of turbo codes in overloaded MIMO-OFDM systems using joint decoding

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