Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel
Feedback about the channel state information (CSI) enables the transmitter nodes to exploit channel conditions to yield large improvements in almost any performance metric. However, in practice, channel adaptive techniques based on full CSI have been deemed impractical due to the finite capacity of...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/137443 |
| _version_ | 1826110674976112640 |
|---|---|
| author | Yepuri, Sudhakara Rao Madhukumar, A. S. Sirigina, Rajendra Prasad |
| author2 | School of Computer Science and Engineering |
| author_facet | School of Computer Science and Engineering Yepuri, Sudhakara Rao Madhukumar, A. S. Sirigina, Rajendra Prasad |
| author_sort | Yepuri, Sudhakara Rao |
| collection | NTU |
| description | Feedback about the channel state information (CSI) enables the transmitter nodes to exploit channel conditions to yield large improvements in almost any performance metric. However, in practice, channel adaptive techniques based on full CSI have been deemed impractical due to the finite capacity of the feedback links. This work considers a multiple-access relay channel (MARC) where two source nodes communicate with one destination node assisted by one half-duplex dynamic decode-and forward (DDF) relay. Using the diversity-multiplexing tradeoff as a figure-of-merit, we propose a practical limited-feedback (LF) mechanism for MARC and show that a small number of information bits about the channel conditions leads to near optimal performance. With no CSI, this system incurs diversity-gain loss at higher multiplexing gains. However, by using an LF scheme where the destination sends an ACK or NACK to the relay, we show that the optimal diversity gain can be achieved across all the multiplexing gains for the considered DDF based MARC system. |
| first_indexed | 2024-10-01T02:38:22Z |
| format | Journal Article |
| id | ntu-10356/137443 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:38:22Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1374432020-03-26T02:46:43Z Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel Yepuri, Sudhakara Rao Madhukumar, A. S. Sirigina, Rajendra Prasad School of Computer Science and Engineering Engineering::Computer science and engineering Protocols Relays Feedback about the channel state information (CSI) enables the transmitter nodes to exploit channel conditions to yield large improvements in almost any performance metric. However, in practice, channel adaptive techniques based on full CSI have been deemed impractical due to the finite capacity of the feedback links. This work considers a multiple-access relay channel (MARC) where two source nodes communicate with one destination node assisted by one half-duplex dynamic decode-and forward (DDF) relay. Using the diversity-multiplexing tradeoff as a figure-of-merit, we propose a practical limited-feedback (LF) mechanism for MARC and show that a small number of information bits about the channel conditions leads to near optimal performance. With no CSI, this system incurs diversity-gain loss at higher multiplexing gains. However, by using an LF scheme where the destination sends an ACK or NACK to the relay, we show that the optimal diversity gain can be achieved across all the multiplexing gains for the considered DDF based MARC system. Accepted version 2020-03-26T02:46:42Z 2020-03-26T02:46:42Z 2018 Journal Article Yepuri, S. R., Madhukumar, A. S., & Sirigina, R. P. (2019). Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel. Wireless Personal Communications, 104(3), 1075–1090. doi:10.1007/s11277-018-6068-8 0929-6212 https://hdl.handle.net/10356/137443 10.1007/s11277-018-6068-8 2-s2.0-85055928134 3 104 1075 1090 en Wireless Personal Communications This is a post-peer-review, pre-copyedit version of an article published in Wireless Personal Communications. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11277-018-6068-8. application/pdf |
| spellingShingle | Engineering::Computer science and engineering Protocols Relays Yepuri, Sudhakara Rao Madhukumar, A. S. Sirigina, Rajendra Prasad Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title | Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title_full | Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title_fullStr | Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title_full_unstemmed | Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title_short | Limited feedback assisted dynamic decode-and-forward relaying for multiple access relay channel |
| title_sort | limited feedback assisted dynamic decode and forward relaying for multiple access relay channel |
| topic | Engineering::Computer science and engineering Protocols Relays |
| url | https://hdl.handle.net/10356/137443 |
| work_keys_str_mv | AT yepurisudhakararao limitedfeedbackassisteddynamicdecodeandforwardrelayingformultipleaccessrelaychannel AT madhukumaras limitedfeedbackassisteddynamicdecodeandforwardrelayingformultipleaccessrelaychannel AT siriginarajendraprasad limitedfeedbackassisteddynamicdecodeandforwardrelayingformultipleaccessrelaychannel |