Polynomial expansion of the precoder for power minimization in large-scale MIMO systems
This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power...
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| Vydané v: | IEEE International Conference on Communications (2003) s. 1 - 6 |
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| Hlavní autori: | , , , , |
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01.05.2016
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| ISSN: | 1938-1883 |
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| Abstract | This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power consumption while ensuring target user rates. As most precoding schemes, a major difficulty towards the implementation of OLP is that it requires fast inversions of large matrices at every new channel realizations. To overcome this issue, we aim at designing a linear precoding scheme providing the same performance of OLP but with lower complexity. This is achieved by applying the truncated polynomial expansion (TPE) concept on a per-user basis. To get a further leap in complexity reduction and allow for closed-form expressions of the per-user weighting coefficients, we resort to the asymptotic regime in which M and K grow large with a bounded ratio. Numerical results are used to show that the proposed TPE precoding scheme achieves the same performance of OLP with a significantly lower implementation complexity. |
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| AbstractList | This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In particular, we are interested in reducing the implementation complexity of the optimal linear precoder (OLP) that minimizes the total power consumption while ensuring target user rates. As most precoding schemes, a major difficulty towards the implementation of OLP is that it requires fast inversions of large matrices at every new channel realizations. To overcome this issue, we aim at designing a linear precoding scheme providing the same performance of OLP but with lower complexity. This is achieved by applying the truncated polynomial expansion (TPE) concept on a per-user basis. To get a further leap in complexity reduction and allow for closed-form expressions of the per-user weighting coefficients, we resort to the asymptotic regime in which M and K grow large with a bounded ratio. Numerical results are used to show that the proposed TPE precoding scheme achieves the same performance of OLP with a significantly lower implementation complexity. |
| Author | Sifaou, Houssem Alouini, Mohamed-Slim Debbah, Merouane Sanguinetti, Luca Kammoun, Abla |
| Author_xml | – sequence: 1 givenname: Houssem surname: Sifaou fullname: Sifaou, Houssem organization: Electr. Eng. Dept., King Abdullah Univ. of Sci. & Technol., Thuwal, Saudi Arabia – sequence: 2 givenname: Abla surname: Kammoun fullname: Kammoun, Abla organization: Electr. Eng. Dept., King Abdullah Univ. of Sci. & Technol., Thuwal, Saudi Arabia – sequence: 3 givenname: Luca surname: Sanguinetti fullname: Sanguinetti, Luca organization: Dipt. di Ing. dell'Inf., Univ. of Pisa, Pisa, Italy – sequence: 4 givenname: Merouane surname: Debbah fullname: Debbah, Merouane organization: Large Networks & Syst. Group, Univ. Paris-Saclay, Gif-sur-Yvette, France – sequence: 5 givenname: Mohamed-Slim surname: Alouini fullname: Alouini, Mohamed-Slim organization: Electr. Eng. Dept., King Abdullah Univ. of Sci. & Technol., Thuwal, Saudi Arabia |
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| Snippet | This work focuses on the downlink of a single-cell large-scale MIMO system in which the base station equipped with M antennas serves K single-antenna users. In... |
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| SubjectTerms | Antennas Asymptotic properties Channels Complexity Complexity theory Electronics Interference Mathematical models MIMO MIMO (control systems) Minimization Optimization Polynomials Precoding Signal to noise ratio |
| Title | Polynomial expansion of the precoder for power minimization in large-scale MIMO systems |
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