Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints
In multiple-input multiple-output (MIMO) systems, per-antenna power constraint (PAPC) has been considered to enhance the power efficiency of the multiple power amplifiers. Under PAPC, however, a conventional space-division multiple access (SDMA)-based two-way relay (TWR) method suffers a significant...
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8444622/ |
| _version_ | 1819169234273435648 |
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| author | Jingon Joung |
| author_facet | Jingon Joung |
| author_sort | Jingon Joung |
| collection | DOAJ |
| description | In multiple-input multiple-output (MIMO) systems, per-antenna power constraint (PAPC) has been considered to enhance the power efficiency of the multiple power amplifiers. Under PAPC, however, a conventional space-division multiple access (SDMA)-based two-way relay (TWR) method suffers a significant bit-error-rate (BER) performance degradation due to the seriously down-scaled transmit power to fulfill the PAPC, which results in energy-efficiency (EE) degradation. In this paper, a new space-time line code (STLC)-based TWR method is proposed to improve the EE. The proposed method can utilize maximum power budget with a low peak-to-average power ratio so that can achieve a better BER performance at the cost of higher power consumption, as verified in numerical simulation results. The benefit of the proposed STLC-based TWR method is justified in terms of EE. The STLC-based TWR system achieves higher EE than the conventional SDMA-based TWR when the maximum transmit power is low, such as a small base station with 23-dBm maximum transmit power. Furthermore, compared with the SDMA-based TWR, the proposed STLC-based TWR can reduce computational complexity by order of magnitude two; therefore, it can be readily extended to a TWR system with a large number of antennas, e.g., a massive MIMO system, which is one of the promising candidates for 5G communications. |
| first_indexed | 2024-12-22T19:16:15Z |
| format | Article |
| id | doaj.art-208d1ba083db42e99455e9383c9140fd |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-22T19:16:15Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-208d1ba083db42e99455e9383c9140fd2022-12-21T18:15:31ZengIEEEIEEE Access2169-35362018-01-016470264703510.1109/ACCESS.2018.28669258444622Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power ConstraintsJingon Joung0https://orcid.org/0000-0002-9551-1123School of Electrical and Electronics Engineering, Chung-Ang University, Seoul, South KoreaIn multiple-input multiple-output (MIMO) systems, per-antenna power constraint (PAPC) has been considered to enhance the power efficiency of the multiple power amplifiers. Under PAPC, however, a conventional space-division multiple access (SDMA)-based two-way relay (TWR) method suffers a significant bit-error-rate (BER) performance degradation due to the seriously down-scaled transmit power to fulfill the PAPC, which results in energy-efficiency (EE) degradation. In this paper, a new space-time line code (STLC)-based TWR method is proposed to improve the EE. The proposed method can utilize maximum power budget with a low peak-to-average power ratio so that can achieve a better BER performance at the cost of higher power consumption, as verified in numerical simulation results. The benefit of the proposed STLC-based TWR method is justified in terms of EE. The STLC-based TWR system achieves higher EE than the conventional SDMA-based TWR when the maximum transmit power is low, such as a small base station with 23-dBm maximum transmit power. Furthermore, compared with the SDMA-based TWR, the proposed STLC-based TWR can reduce computational complexity by order of magnitude two; therefore, it can be readily extended to a TWR system with a large number of antennas, e.g., a massive MIMO system, which is one of the promising candidates for 5G communications.https://ieeexplore.ieee.org/document/8444622/Energy efficiencypeak-to-average power ratioper-antenna power constraintspace-division multiple accessspace-time line codetwo-way relay |
| spellingShingle | Jingon Joung Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints IEEE Access Energy efficiency peak-to-average power ratio per-antenna power constraint space-division multiple access space-time line code two-way relay |
| title | Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints |
| title_full | Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints |
| title_fullStr | Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints |
| title_full_unstemmed | Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints |
| title_short | Energy Efficient Space–Time Line Coded Regenerative Two-Way Relay Under Per-Antenna Power Constraints |
| title_sort | energy efficient space x2013 time line coded regenerative two way relay under per antenna power constraints |
| topic | Energy efficiency peak-to-average power ratio per-antenna power constraint space-division multiple access space-time line code two-way relay |
| url | https://ieeexplore.ieee.org/document/8444622/ |
| work_keys_str_mv | AT jingonjoung energyefficientspacex2013timelinecodedregenerativetwowayrelayunderperantennapowerconstraints |