Wireless information and power transfer: Architecture design and rate-energy tradeoff

Abstract

Simultaneous information and power transfer over the wireless channels potentially offers great convenience to mobile users. Yet practical receiver designs impose technical constraints on its hardware realization, as practical circuits for harvesting energy from radio signals are not yet able to decode the carried information directly. To make theoretical progress, we propose a general receiver operation, namely, dynamic power splitting (DPS), which splits the received signal with adjustable power for energy harvesting and for information decoding. Moreover, we propose two types of practical receiver architectures, namely, separated versus integrated information and energy receivers. The integrated receiver integrates the front-end components of the separated receiver, thus achieving a smaller form factor. The rateenergy tradeoff for these two architectures are characterized by a so-called rate-energy (R-E) region. Numerical results show that the R-E region of the integrated receiver is superior to that of the separated receiver when more harvested power is desired.

Simultaneous information and power transfer in wireless cooperative networks

“…Among the various energy harvesting relaying models, we focus on power splitting [6], [7]. Specifically, the cooperative transmission consists of two 2013 8th International Conference on Communications and Networking in China (CHINACOM) 978-1-4799-1406-7 © 2013 IEEE 2 time slots of duration 2 .…”

Optimal simultaneous wireless information and energy transfer in OFDMA decode-and-forward relay networks

“…Then we have P N n¼1 P S;1 n P S . In addition, the harvested energy at the relay is expressed as [4] …”

“…Thus, wireless signals can be used as a means for the delivery of information and energy simultaneously. As a result, the concept of simultaneous wireless information and energy transfer (SWIET) was proposed in [3] and a general receiver architecture, in which the circuits for EH and signal detection are operated in a time-switching (TS) or power-splitting (PS) manner, was proposed in [4] to harvest energy and decode information simultaneously. Moreover, SWIET on achieving rate-energy tradeoff in various wireless communication networks has been studied in [5][6][7][8].…”

Performance analysis of simultaneous wireless information and power transfer in MISO systems

“…Similar studies have been performed for multiple-input multiple-output (MIMO) systems, for both perfect and imperfect channel state information (CSI) at the transmitter [4], [5]. Along the same lines, a practical hardware architecture design, taking into account the power consumption of the decoding operations at the receiver has been proposed in [6]. The performance of a rather different system, in which a system in which the energy and information transfers are performed by two different devices operating in frequency-division duplexing (FDD) mode, is studied in [7].…”