DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, J. | - |
dc.contributor.author | Choi, J. | - |
dc.contributor.author | Poor, H.V. | - |
dc.contributor.author | Shin, W. | - |
dc.contributor.author | Lee, N. | - |
dc.date.accessioned | 2022-02-23T06:40:22Z | - |
dc.date.available | 2022-02-23T06:40:22Z | - |
dc.date.created | 2021-12-22 | - |
dc.date.issued | 2021-03 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/109464 | - |
dc.description.abstract | In this paper, we consider a downlink multiple-input multiple-output (MIMO) system, where a rate splitting approach is applied to serve multiple users more efficiently. We formulate a sum spectral efficiency maximization problem with respect to precoders when noisy channel state information is available at the transmitter. Finding even a suboptimal solution is a very challenging task by its non-convexity and non-smoothness. To resolve this challenge, we first approximate the non-smooth minimum function by using a LogSumExp technique, and reformulate the problem as a form of the product of Rayleigh quotients, considering channel estimation error. Then we derive the first-order optimality condition. A key observation of the obtained condition is that it can be cast as a nonlinear eigenvector-dependent eigenvalue problem so that finding a leading eigenvector is equivalent to finding a local optimal solution. To this end, we propose an algorithm inspired by a power iteration method, referred to as a generalized power iteration for rate splitting. Simulation results show that the proposed method enhances the achievable performance when channel acquisition error exists. ? 2021 IEEE. | - |
dc.language | English | - |
dc.publisher | Institute of Electrical and Electronics Engineers Inc. | - |
dc.relation.isPartOf | 2021 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2021 | - |
dc.relation.isPartOf | 2021 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2021 | - |
dc.title | Sum Spectral Efficiency Optimization for Rate Splitting in Downlink MU-MISO: A Generalized Power Iteration Approach | - |
dc.type | Conference | - |
dc.type.rims | CONF | - |
dc.identifier.bibliographicCitation | 2021 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2021 | - |
dc.identifier.wosid | 000706454500059 | - |
dc.citation.conferenceDate | 2021-03-29 | - |
dc.citation.conferencePlace | CC | - |
dc.citation.title | 2021 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2021 | - |
dc.contributor.affiliatedAuthor | Lee, N. | - |
dc.identifier.scopusid | 2-s2.0-85106005152 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
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