Throughput optimization for wireless energy transfer in massive MIMO systems: A superimposed pilot aided approach

This paper considers a wireless-energy-transfer (WET)-enabled massive multiple-input-multiple-output (MIMO) system based on superimposed pilot (SP). With the aid of SP, the uplink (UL) channel estimation and wireless information transmission (WIT) that powered by the downlink (DL) WET can be operated simultaneously, and thus provide the potential for improving the UL achievable rate. The impact that SP has on the performance of such a WET-enabled massive MIMO system is mathematically characterized, and the UL achievable throughput is maximized by optimizing the variables, including the SP power-allocation factor and the time-allocation factor between the duration of WET and WIT. Numerical results validate the effectiveness of the proposed scheme.

[1]  Xianfu Chen,et al.  Energy-Efficient Optimization for Wireless Information and Power Transfer in Large-Scale MIMO Systems Employing Energy Beamforming , 2013, IEEE Wireless Communications Letters.

[2]  Anant Sahai,et al.  Shannon meets Tesla: Wireless information and power transfer , 2010, 2010 IEEE International Symposium on Information Theory.

[3]  Derrick Wing Kwan Ng,et al.  Wireless Information and Power Transfer: Energy Efficiency Optimization in OFDMA Systems , 2013, IEEE Transactions on Wireless Communications.

[4]  Vinod Sharma,et al.  Optimal energy management policies for energy harvesting sensor nodes , 2008, IEEE Transactions on Wireless Communications.

[5]  Mohamed K. Watfa,et al.  Multi-Hop Wireless Energy Transfer in WSNs , 2011, IEEE Communications Letters.

[6]  Meixia Tao,et al.  Robust Beamforming for Wireless Information and Power Transmission , 2012, IEEE Wireless Communications Letters.

[7]  J. Gozalvez,et al.  Opportunistic technique for efficient wireless vehicular communications , 2007, IEEE Vehicular Technology Magazine.

[8]  Erik G. Larsson,et al.  Simultaneous Information and Power Transfer for Broadband Wireless Systems , 2012, IEEE Transactions on Signal Processing.

[9]  Lav R. Varshney,et al.  Transporting information and energy simultaneously , 2008, 2008 IEEE International Symposium on Information Theory.

[10]  Buon Kiong Lau,et al.  Impact of Nonorthogonal Training on Performance of Downlink Base Station Cooperative Transmission , 2011, IEEE Transactions on Vehicular Technology.

[11]  Rui Zhang,et al.  MIMO Broadcasting for Simultaneous Wireless Information and Power Transfer , 2013 .

[12]  Chih-Peng Li,et al.  On the Power Allocation and System Capacity of OFDM Systems Using Superimposed Training Schemes , 2009, IEEE Transactions on Vehicular Technology.

[13]  Yong Liang Guan,et al.  Throughput Optimization for Massive MIMO Systems Powered by Wireless Energy Transfer , 2014, IEEE Journal on Selected Areas in Communications.

[14]  Rui Zhang,et al.  Wireless information and power transfer in multiuser OFDM systems , 2013, 2013 IEEE Global Communications Conference (GLOBECOM).

[15]  Javier Gozalvez,et al.  WiTricity—The Wireless Power Transfer , 2007 .

[16]  Shan Gao,et al.  On Superimposed Pilot for Channel Estimation in Multicell Multiuser MIMO Uplink: Large System Analysis , 2016, IEEE Transactions on Vehicular Technology.