Linear Precoder Design for Simultaneous Information and Energy Transfer over Two-User MIMO Interference Channels
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| Title: | Linear Precoder Design for Simultaneous Information and Energy Transfer over Two-User MIMO Interference Channels |
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| Authors: | Ozcelikkale, Ayca, 1982, Duman, T. M. |
| Source: | IEEE Transactions on Wireless Communications. 14(10):5836-5847 |
| Subject Terms: | quality-of-service, multi-terminal, multi-user, wireless energy transfer, signal-to-noise ratio (SNR), wireless power transfer, energy harvesting, simultaneous wireless information and power transfer (SWIPT), interference channel, minimum mean-square error (MMSE) |
| Description: | Communication strategies that utilize wireless media for simultaneous information and power transfer offer a promising perspective for efficient usage of energy resources. With this motivation, we focus on the design of optimal linear precoders for interference channels utilizing such strategies. We formulate the problem of minimizing the total minimum mean-square error while keeping the energy harvested at the energy receivers above given levels. Our framework leads to a non-convex problem formulation. For point-to-point multiple-input multiple-output channels, we provide a characterization of the optimal solutions under a constraint on the number of transmit antennas. For the general interference scenario, we propose two numerical approaches, one for the single antenna information receivers case, and the other for the general case. We also investigate a hybrid signalling scheme, where the transmitter sends a superposition of two signals: a deterministic signal optimized for energy transfer and an information carrying signal optimized for information and energy transfer. It is illustrated that if hybrid signalling is not incorporated into the transmission scheme, interference can be detrimental to the system performance when the number of antennas at the receivers is low.} |
| File Description: | electronic |
| Access URL: | https://research.chalmers.se/publication/218413 http://publications.lib.chalmers.se/records/fulltext/218413/local_218413.pdf |
| Database: | SwePub |
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Nájsť tento článok vo Web of Science | Abstract: | Communication strategies that utilize wireless media for simultaneous information and power transfer offer a promising perspective for efficient usage of energy resources. With this motivation, we focus on the design of optimal linear precoders for interference channels utilizing such strategies. We formulate the problem of minimizing the total minimum mean-square error while keeping the energy harvested at the energy receivers above given levels. Our framework leads to a non-convex problem formulation. For point-to-point multiple-input multiple-output channels, we provide a characterization of the optimal solutions under a constraint on the number of transmit antennas. For the general interference scenario, we propose two numerical approaches, one for the single antenna information receivers case, and the other for the general case. We also investigate a hybrid signalling scheme, where the transmitter sends a superposition of two signals: a deterministic signal optimized for energy transfer and an information carrying signal optimized for information and energy transfer. It is illustrated that if hybrid signalling is not incorporated into the transmission scheme, interference can be detrimental to the system performance when the number of antennas at the receivers is low.} |
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| ISSN: | 15582248 15361276 |
| DOI: | 10.1109/TWC.2015.2443099 |