Multi-tone Signal Optimization for Wireless Power Transfer in the Presence of Wireless Communication Links

QC 20200623
In this paper, we study optimization of multi-tone signals for wireless power transfer (WPT) systems. We investigate different non-linear energy harvesting models. Two of them are adopted to optimize the multi-tone signal according to the channel state information available at the transmitter. We show that a second-order polynomial curve-fitting model can be utilized to optimize the multi-tone signal for any RF energy harvester design. We consider both single-antenna and multi-antenna WPT systems. In-band co-existing communication links are also considered in this work by imposing a constraint on the received power at the nearby information receiver to prevent its RF front end from saturation. We emphasize the importance of imposing such constraint by explaining how inter-modulation products, due to saturation, can cause high interference at the information receiver in the case of multi-tone signals. The multi-tone optimization problem is formulated as a non-convex linearly constrained quadratic program. Two globally optimal solution approaches using mixed-integer linear programming and finite branch-and-bound techniques are proposed to solve the problem. The achieved improvement resulting from applying both solution methods to the multi-tone optimization problem is highlighted through simulations and comparisons with other solutions existing in the literature.

Ghauch, Hadi,1986-Department of COMELEC, Institut Mines-Telecom, Telecom-ParisTech, Paris, 91120, France(Swepub:kth)u1lujhq6 (author)
Thobaben, RagnarKTH,Teknisk informationsvetenskap(Swepub:kth)u1rs7mp9 (author)
Jonsson, B. Lars G.KTH,Elektroteknisk teori och konstruktion(Swepub:kth)u12ind03 (author)
KTHTeknisk informationsvetenskap (creator_code:org_t)

In:IEEE Transactions on Wireless Communications: Institute of Electrical and Electronics Engineers (IEEE)19:5, s. 3575-35901536-12761558-2248

By the author/editor: A. Mouris, Boule ...; Ghauch, Hadi, 19 ...; Thobaben, Ragnar; Jonsson, B. Lars ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Telecommunicatio ...

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