A unified message-passing algorithm for MIMO-SDMA in software-defined radio
This paper presents a novel software radio implementation for joint channel estimation, data decoding, and noise variance estimation in multiple-input multiple-output (MIMO) space division multiple access (SDMA). In contrast to many other iterative solutions, the proposed receiver is derived within...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
SpringerOpen (part of Springer Nature)
2017
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| _version_ | 1826275988921647104 |
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| author | Kocian, A Badiu, MA Fleury, BH Martelli, F Santi, P |
| author_facet | Kocian, A Badiu, MA Fleury, BH Martelli, F Santi, P |
| author_sort | Kocian, A |
| collection | OXFORD |
| description | This paper presents a novel software radio implementation for joint channel estimation, data decoding, and noise variance estimation in multiple-input multiple-output (MIMO) space division multiple access (SDMA). In contrast to many other iterative solutions, the proposed receiver is derived within the theoretical framework of a unified message-passing algorithm, combining belief propagation (BP) and the mean field approximation (MF) on the corresponding factor graph. The algorithm minimizes the region-based variational free energy in the system under appropriate conditions and, hence, converges to a fixpoint. As a use-case, we consider the high-rate packet-oriented IEEE 802.11n standard. Our receiver is implemented on a software-defined radio platform dubbed MIMONet, composed of a GNU radio software component and a universal software radio peripheral (USRP). The receiver was evaluated in real indoor environments. The results of our study clearly show that, once synchronization issues are properly addressed, the BP-MF receiver provides a substantial performance improvement compared to a conventional receiver also in real-world settings. Such improvement comes at the expense of an increase in running time that can be as high as 87. Therefore, the trade-off between communication performance and receiver complexity should be carefully evaluated in practical settings. |
| first_indexed | 2024-03-06T23:07:13Z |
| format | Journal article |
| id | oxford-uuid:644115a1-d292-433e-a003-d2525be7669c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:07:13Z |
| publishDate | 2017 |
| publisher | SpringerOpen (part of Springer Nature) |
| record_format | dspace |
| spelling | oxford-uuid:644115a1-d292-433e-a003-d2525be7669c2022-03-26T18:17:50ZA unified message-passing algorithm for MIMO-SDMA in software-defined radioJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:644115a1-d292-433e-a003-d2525be7669cEnglishSymplectic ElementsSpringerOpen (part of Springer Nature)2017Kocian, ABadiu, MA Fleury, BHMartelli, FSanti, PThis paper presents a novel software radio implementation for joint channel estimation, data decoding, and noise variance estimation in multiple-input multiple-output (MIMO) space division multiple access (SDMA). In contrast to many other iterative solutions, the proposed receiver is derived within the theoretical framework of a unified message-passing algorithm, combining belief propagation (BP) and the mean field approximation (MF) on the corresponding factor graph. The algorithm minimizes the region-based variational free energy in the system under appropriate conditions and, hence, converges to a fixpoint. As a use-case, we consider the high-rate packet-oriented IEEE 802.11n standard. Our receiver is implemented on a software-defined radio platform dubbed MIMONet, composed of a GNU radio software component and a universal software radio peripheral (USRP). The receiver was evaluated in real indoor environments. The results of our study clearly show that, once synchronization issues are properly addressed, the BP-MF receiver provides a substantial performance improvement compared to a conventional receiver also in real-world settings. Such improvement comes at the expense of an increase in running time that can be as high as 87. Therefore, the trade-off between communication performance and receiver complexity should be carefully evaluated in practical settings. |
| spellingShingle | Kocian, A Badiu, MA Fleury, BH Martelli, F Santi, P A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title | A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title_full | A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title_fullStr | A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title_full_unstemmed | A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title_short | A unified message-passing algorithm for MIMO-SDMA in software-defined radio |
| title_sort | unified message passing algorithm for mimo sdma in software defined radio |
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