Simultaneous wireless information and power transfer (SWIPT) is a promising solution to carry energy as well as information at the same time for wireless networks. In this paper, we consider a precoding matrix design for multiple-input multiple-output (MIMO) SWIPT systems with finite-alphabet inputs. The problem can be formulated as maximizing the mutual information given the energy level and the power constraint for achieving a so-called rate-energy region. The formulated problem is non-concave, which can be reduced to a convex power allocation problem by the proposed gradient-descend design of the precoding matrix. Several rate-energy regions can be achieved by trading off between the information rate and the harvested energy with different schemes. Simulation results indicate that the proposed scheme with finite-alphabet inputs provides significant performance gain over existing schemes with Gaussian inputs.
Wireless Personal Communications – Springer Journals
Published: May 9, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud