Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI
Abstract In this paper, we analyze the throughput of multi-hop amplify and forward (AF) relay networks in delay-constrained scenario. Using quantized channel state information (CSI), the transmission rates and powers are discretely adapted with individual average power constraint on each node. A sub...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-04-01
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| Series: | EURASIP Journal on Wireless Communications and Networking |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13638-019-1423-3 |
| _version_ | 1818198052089888768 |
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| author | Mehrdad Taki Tommy Svensson Mohammad Bagher Nezafati |
| author_facet | Mehrdad Taki Tommy Svensson Mohammad Bagher Nezafati |
| author_sort | Mehrdad Taki |
| collection | DOAJ |
| description | Abstract In this paper, we analyze the throughput of multi-hop amplify and forward (AF) relay networks in delay-constrained scenario. Using quantized channel state information (CSI), the transmission rates and powers are discretely adapted with individual average power constraint on each node. A sub-gradient projection-based algorithm is utilized, by which there is no need for probability density functions (PDFs) to solve the optimization problem. Our numerical evaluations show that the sub-gradient projection-based algorithm results in a comparable performance with an analytical approach using PDFs. As shown, a considerably better performance obtained by the designed scheme compared to previous schemes with constant power transmission. More than 70% throughput improvement is achieved by our scheme compared to constant power transmission with just two more feedback bits and a short training time required at the beginning of the transmission. |
| first_indexed | 2024-12-12T01:59:44Z |
| format | Article |
| id | doaj.art-264c8f90577645f5a3890be52e22fb25 |
| institution | Directory Open Access Journal |
| issn | 1687-1499 |
| language | English |
| last_indexed | 2024-12-12T01:59:44Z |
| publishDate | 2019-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Wireless Communications and Networking |
| spelling | doaj.art-264c8f90577645f5a3890be52e22fb252022-12-22T00:42:13ZengSpringerOpenEURASIP Journal on Wireless Communications and Networking1687-14992019-04-012019111210.1186/s13638-019-1423-3Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSIMehrdad Taki0Tommy Svensson1Mohammad Bagher Nezafati2Department of Electrical Engineering, University of QomDepartment of Signals and Systems, Chalmers University of technologyInstitute for Research in Fundamental SciencesAbstract In this paper, we analyze the throughput of multi-hop amplify and forward (AF) relay networks in delay-constrained scenario. Using quantized channel state information (CSI), the transmission rates and powers are discretely adapted with individual average power constraint on each node. A sub-gradient projection-based algorithm is utilized, by which there is no need for probability density functions (PDFs) to solve the optimization problem. Our numerical evaluations show that the sub-gradient projection-based algorithm results in a comparable performance with an analytical approach using PDFs. As shown, a considerably better performance obtained by the designed scheme compared to previous schemes with constant power transmission. More than 70% throughput improvement is achieved by our scheme compared to constant power transmission with just two more feedback bits and a short training time required at the beginning of the transmission.http://link.springer.com/article/10.1186/s13638-019-1423-3Multi-hop relayAmplify and forward relayingDiscrete link adaptationAdaptive modulation and codingDelay-QoS constraint |
| spellingShingle | Mehrdad Taki Tommy Svensson Mohammad Bagher Nezafati Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI EURASIP Journal on Wireless Communications and Networking Multi-hop relay Amplify and forward relaying Discrete link adaptation Adaptive modulation and coding Delay-QoS constraint |
| title | Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI |
| title_full | Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI |
| title_fullStr | Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI |
| title_full_unstemmed | Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI |
| title_short | Delay constrained throughput optimization in multi-hop AF relay networks, using limited quantized CSI |
| title_sort | delay constrained throughput optimization in multi hop af relay networks using limited quantized csi |
| topic | Multi-hop relay Amplify and forward relaying Discrete link adaptation Adaptive modulation and coding Delay-QoS constraint |
| url | http://link.springer.com/article/10.1186/s13638-019-1423-3 |
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