Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression
Successive relaying holds the promise of achieving spatial diversity gain for single-antenna users while recovering the multiplexing loss due to the half-duplex relaying in B5G/6G. However, how to mitigate inter-relay interference (IRI) with privacy protection in low complexity remains open. In this...
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9076169/ |
| _version_ | 1818445584703422464 |
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| author | Jianjing Wei Jie Wei Shaoling Hu Wei Chen |
| author_facet | Jianjing Wei Jie Wei Shaoling Hu Wei Chen |
| author_sort | Jianjing Wei |
| collection | DOAJ |
| description | Successive relaying holds the promise of achieving spatial diversity gain for single-antenna users while recovering the multiplexing loss due to the half-duplex relaying in B5G/6G. However, how to mitigate inter-relay interference (IRI) with privacy protection in low complexity remains open. In this paper, we present a successive decode-and-forward (DF) relaying protocol based on an analog network interference cancellation (NICE) method, which may suppress IRI, using linear processing without decoding the signals from the source. More specifically, a relay actively keeps receiving signals from the source, which are then used as prior knowledge to enable an amplify-and-cancel (AC) IRI mitigation strategy. The AC based IRI suppression is capable of improving high information privacy, because a relay does not need to know codebooks used by other relays and will not decode any signals intended for other relays. We obtain the closed-form expression of the minimum residual interference power, based on which the average throughput and the optimal diversity-multiplexing tradeoff (DMT) are presented. The DMT analysis along with simulations shows that the proposed method outperforms conventional two-timeslot half-duplex relaying in terms of the spectral efficiency. It also achieves lower complexity than CAO-SIR based on decode-and-cancel (DC) in [1] and lower IRI than the successive amplify-and-forward (AF) relaying in [2]. |
| first_indexed | 2024-12-14T19:34:09Z |
| format | Article |
| id | doaj.art-ecabe9d302034ca4a36aa8614fb2b68e |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T19:34:09Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-ecabe9d302034ca4a36aa8614fb2b68e2022-12-21T22:49:59ZengIEEEIEEE Access2169-35362020-01-018957939580610.1109/ACCESS.2020.29895039076169Successive Decode-and-Forward Relaying With Privacy-Aware Interference SuppressionJianjing Wei0https://orcid.org/0000-0003-4242-9123Jie Wei1https://orcid.org/0000-0001-6512-5953Shaoling Hu2https://orcid.org/0000-0001-9783-4674Wei Chen3https://orcid.org/0000-0002-9066-1448School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, ChinaSchool of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, ChinaDepartment of Electronic Engineering, Tsinghua University, Beijing, ChinaDepartment of Electronic Engineering, Tsinghua University, Beijing, ChinaSuccessive relaying holds the promise of achieving spatial diversity gain for single-antenna users while recovering the multiplexing loss due to the half-duplex relaying in B5G/6G. However, how to mitigate inter-relay interference (IRI) with privacy protection in low complexity remains open. In this paper, we present a successive decode-and-forward (DF) relaying protocol based on an analog network interference cancellation (NICE) method, which may suppress IRI, using linear processing without decoding the signals from the source. More specifically, a relay actively keeps receiving signals from the source, which are then used as prior knowledge to enable an amplify-and-cancel (AC) IRI mitigation strategy. The AC based IRI suppression is capable of improving high information privacy, because a relay does not need to know codebooks used by other relays and will not decode any signals intended for other relays. We obtain the closed-form expression of the minimum residual interference power, based on which the average throughput and the optimal diversity-multiplexing tradeoff (DMT) are presented. The DMT analysis along with simulations shows that the proposed method outperforms conventional two-timeslot half-duplex relaying in terms of the spectral efficiency. It also achieves lower complexity than CAO-SIR based on decode-and-cancel (DC) in [1] and lower IRI than the successive amplify-and-forward (AF) relaying in [2].https://ieeexplore.ieee.org/document/9076169/Cooperative diversitysuccessive relayinginter-relay interferencedecode-and-forwardinterference suppressionpower allocation |
| spellingShingle | Jianjing Wei Jie Wei Shaoling Hu Wei Chen Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression IEEE Access Cooperative diversity successive relaying inter-relay interference decode-and-forward interference suppression power allocation |
| title | Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression |
| title_full | Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression |
| title_fullStr | Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression |
| title_full_unstemmed | Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression |
| title_short | Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression |
| title_sort | successive decode and forward relaying with privacy aware interference suppression |
| topic | Cooperative diversity successive relaying inter-relay interference decode-and-forward interference suppression power allocation |
| url | https://ieeexplore.ieee.org/document/9076169/ |
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