Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect
We investigate the asymptotic behavior for an overlooked aspect of spectrum-sharing systems when the number of transmit antennas nt at the secondary transmitter (ST) grows to infinity. Considering imperfect channel state information (CSI), we apply the transmit antenna selection and the maximal-rati...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8846011/ |
| _version_ | 1818323501985038336 |
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| author | Ruifeng Duan Zhong Zheng Riku Jantti Jyri Hamalainen Zygmunt J. Haas |
| author_facet | Ruifeng Duan Zhong Zheng Riku Jantti Jyri Hamalainen Zygmunt J. Haas |
| author_sort | Ruifeng Duan |
| collection | DOAJ |
| description | We investigate the asymptotic behavior for an overlooked aspect of spectrum-sharing systems when the number of transmit antennas nt at the secondary transmitter (ST) grows to infinity. Considering imperfect channel state information (CSI), we apply the transmit antenna selection and the maximal-ratio combining techniques at the ST and the secondary receiver (SR), respectively. First, we obtain the signalto-noise ratio (SNR) distributions received by the SR under perfect and imperfect CSI conditions. Then we show that the SNR distributions are tail-equivalent in the sense that the right tails of the two distributions decay in the same rate as the number of transmit antennas nt grows to infinity. Based on the extreme value theory, when the transmit power of the ST is solely limited by the interference constraint, we show that the limiting SNR at the SR is Fréchet-distributed and the limiting rate scales as log(n<sub>t</sub>). When the transmit power of ST is determined by both the maximal transmit power and the interference power constraints, the limiting SNR is Gumbel-distributed and the limiting rate scales as log(log(n<sub>t</sub>)). We further show that the average rate can be estimated by the corresponding easier-to-obtain outage rate. Numerical results indicate that the derived asymptotic rate expressions represent accurate approximations even when nt is “not-solarge”. Finally, we study the robustness of the secondary transmissions by analyzing the corresponding average symbol error rates (SER) under general modulation and coding schemes. The findings indicate that the SER is Weibull distributed, when the maximal transmit power and interference power constraints are comparable. |
| first_indexed | 2024-12-13T11:13:42Z |
| format | Article |
| id | doaj.art-e8fc4bf58e854bea80b9d5eac7150528 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-13T11:13:42Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-e8fc4bf58e854bea80b9d5eac71505282022-12-21T23:48:40ZengIEEEIEEE Access2169-35362019-01-01713806213807810.1109/ACCESS.2019.29430838846011Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked AspectRuifeng Duan0https://orcid.org/0000-0002-6278-933XZhong Zheng1Riku Jantti2Jyri Hamalainen3Zygmunt J. Haas4Department of Communications and Networking, Aalto University, Espoo, FinlandSchool of Information and Electronics, Beijing Institute of Technology, Beijing, ChinaDepartment of Communications and Networking, Aalto University, Espoo, FinlandDepartment of Communications and Networking, Aalto University, Espoo, FinlandDepartment of Computer Science, The University of Texas at Dallas, Richardson, TX, USAWe investigate the asymptotic behavior for an overlooked aspect of spectrum-sharing systems when the number of transmit antennas nt at the secondary transmitter (ST) grows to infinity. Considering imperfect channel state information (CSI), we apply the transmit antenna selection and the maximal-ratio combining techniques at the ST and the secondary receiver (SR), respectively. First, we obtain the signalto-noise ratio (SNR) distributions received by the SR under perfect and imperfect CSI conditions. Then we show that the SNR distributions are tail-equivalent in the sense that the right tails of the two distributions decay in the same rate as the number of transmit antennas nt grows to infinity. Based on the extreme value theory, when the transmit power of the ST is solely limited by the interference constraint, we show that the limiting SNR at the SR is Fréchet-distributed and the limiting rate scales as log(n<sub>t</sub>). When the transmit power of ST is determined by both the maximal transmit power and the interference power constraints, the limiting SNR is Gumbel-distributed and the limiting rate scales as log(log(n<sub>t</sub>)). We further show that the average rate can be estimated by the corresponding easier-to-obtain outage rate. Numerical results indicate that the derived asymptotic rate expressions represent accurate approximations even when nt is “not-solarge”. Finally, we study the robustness of the secondary transmissions by analyzing the corresponding average symbol error rates (SER) under general modulation and coding schemes. The findings indicate that the SER is Weibull distributed, when the maximal transmit power and interference power constraints are comparable.https://ieeexplore.ieee.org/document/8846011/Spectrum sharingextreme value theoryrate scaling lawsymbol error rate |
| spellingShingle | Ruifeng Duan Zhong Zheng Riku Jantti Jyri Hamalainen Zygmunt J. Haas Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect IEEE Access Spectrum sharing extreme value theory rate scaling law symbol error rate |
| title | Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect |
| title_full | Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect |
| title_fullStr | Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect |
| title_full_unstemmed | Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect |
| title_short | Asymptotic Analysis for Spectrum-Sharing Systems With TAS/MRC Using Extreme Value Theory: An Overlooked Aspect |
| title_sort | asymptotic analysis for spectrum sharing systems with tas mrc using extreme value theory an overlooked aspect |
| topic | Spectrum sharing extreme value theory rate scaling law symbol error rate |
| url | https://ieeexplore.ieee.org/document/8846011/ |
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