Adaptive Interference Alignment with CSI Uncertainty
Interference alignment (IA) is known to significantly increase sum-throughput at high SNR in the presence of multiple interfering nodes, however, the reliability of IA is little known, which is the subject of this paper. We study the error performance of IA and compare it with conventional orthogona...
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| Vydáno v: | IEEE transactions on communications Ročník 61; číslo 2; s. 792 - 801 |
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| Hlavní autoři: | , , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
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New York, NY
IEEE
01.02.2013
Institute of Electrical and Electronics Engineers |
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| ISSN: | 0090-6778 |
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| Abstract | Interference alignment (IA) is known to significantly increase sum-throughput at high SNR in the presence of multiple interfering nodes, however, the reliability of IA is little known, which is the subject of this paper. We study the error performance of IA and compare it with conventional orthogonal transmission schemes. Since most IA algorithms require extensive channel state information (CSI), we also investigate the impact of CSI imperfection (uncertainty) on the error performance. Our results show that under identical rates, IA attains a better error performance than the orthogonal scheme for practical signal to noise ratio (SNR) values but is more sensitive to CSI uncertainty. We design bit loading algorithms that significantly improve error performance of the existing IA schemes. Furthermore, we propose an adaptive transmission scheme that not only considerably reduces error probability, but also produces robustness to CSI uncertainty. |
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| AbstractList | Interference alignment (IA) is known to significantly increase sum-throughput at high SNR in the presence of multiple interfering nodes, however, the reliability of IA is little known, which is the subject of this paper. We study the error performance of IA and compare it with conventional orthogonal transmission schemes. Since most IA algorithms require extensive channel state information (CSI), we also investigate the impact of CSI imperfection (uncertainty) on the error performance. Our results show that under identical rates, IA attains a better error performance than the orthogonal scheme for practical signal to noise ratio (SNR) values but is more sensitive to CSI uncertainty. We design bit loading algorithms that significantly improve error performance of the existing IA schemes. Furthermore, we propose an adaptive transmission scheme that not only considerably reduces error probability, but also produces robustness to CSI uncertainty. |
| Author | Baile Xie Yang Li Minn, H. Nosratinia, A. |
| Author_xml | – sequence: 1 surname: Baile Xie fullname: Baile Xie email: baile.xie@utdallas.edu organization: Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA – sequence: 2 surname: Yang Li fullname: Yang Li email: yang@utdallas.edu organization: Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA – sequence: 3 givenname: H. surname: Minn fullname: Minn, H. email: hlaing.minn@utdallas.edu organization: Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA – sequence: 4 givenname: A. surname: Nosratinia fullname: Nosratinia, A. email: aria@utdallas.edu organization: Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA |
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| Keywords | MIMO system SVD Parameter estimation Error probability Error estimation Bit error rate Flow rate regulation Information rate Teletraffic Spatial multiplexing bit error rate (BER) Algorithm Adaptive method Information transmission bit loading Traffic management Channel estimation Traffic control Robustness MIMO Reliability Interference alignment Singular value decomposition Signal to noise ratio |
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| SubjectTerms | Algorithm design and analysis Applied sciences Bit error rate bit error rate (BER) bit loading Detection, estimation, filtering, equalization, prediction Exact sciences and technology Information, signal and communications theory Interference Interference alignment Loading MIMO Multiplexing Signal and communications theory Signal to noise ratio Signal, noise spatial multiplexing SVD Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Teletraffic Transmission and modulation (techniques and equipments) Vectors |
| Title | Adaptive Interference Alignment with CSI Uncertainty |
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