Communication Net and MIMO Precoding Study on Wind Power Monitoring System

2014 ◽  
Vol 543-547 ◽  
pp. 938-941
Author(s):  
Xin Li Cao ◽  
Yun Dong Wen

Paper studies the design of MIMO antennas and channel precoding on data communication net of wind power monitoring system. Paper first analyses communication network model of monitoring system. Then configures MIMO in the base station. Paper explains MMSE-QR linear precoding, then give the algorithm of QR-MMSE-SIC in the case of known ideal or partial channel state information at transmitter. Finally, BER of several precoding models with and without precoding are analyzed. It gives a theoretical method of communication net configuring and precoding on wind power transmission net.

Author(s):  
Kui Xu ◽  
Ming Zhang ◽  
Jie Liu ◽  
Nan Sha ◽  
Wei Xie ◽  
...  

Abstract In this paper, we design the simultaneous wireless information and power transfer (SWIPT) protocol for massive multi-input multi-output (mMIMO) system with non-linear energy-harvesting (EH) terminals. In this system, the base station (BS) serves a set of uplink fixed half-duplex (HD) terminals with non-linear energy harvester. Considering the non-linearity of practical energy-harvesting circuits, we adopt the realistic non-linear EH model rather than the idealistic linear EH model. The proposed SWIPT protocol can be divided into two phases. The first phase is designed for terminals EH and downlink training. A beam domain energy beamforming method is employed for the wireless power transmission. In the second phase, the BS forms the two-layer receive beamformers for the reception of signals transmitted by terminals. In order to improve the spectral efficiency (SE) of the system, the BS transmit power- and time-switching ratios are optimized. Simulation results show the superiority of the proposed beam-domain SWIPT protocol on SE performance compared with the conventional mMIMO SWIPT protocols.


Author(s):  
Maisagalla Gopal ◽  
T Chandra Prakash ◽  
N Venkata Ramakrishna ◽  
Bonthala Prabhanjan Yadav

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