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This paper reports a novel design and system performance evaluation of 3D MIMO under LTE-A framework based on 3GPP FD MIMO channel model.We exhibit a creative design of centralized configuration for data processing convenience on BS side considering massive MIMO antenna structure, we also present analysis of three main risks on 3D massive MIMO demonstrator design, including time synchronization, channel...
Towards future large-volume data (such as UHD video) transferring between data storage and server, massive MIMO concept for sub-THz wireless communication by CMOS technology is explored in this paper. To compensate large path loss and attenuation, CMOS power efficient RF-front for massive MIMO is discussed by the use of metamaterial device for coherent sub-THz signal generation, propagation and detection.
Long term evolution (LTE) is one of the most effective techniques to improve the capacity and bit of communication. In order to detect the presence of the primary user signal with high probability in LTE, spectrum sensing is a fundamental requirement to achieve the goal of cognitive radio (CR). we consider cooperative spectrum sensing in LTE based on energy detection. This is a basic condition for...
Antenna designers should have enough experience in traditional antenna design, and its efficiency was low. Evolutionary algorithm could improve the efficiency of designing antenna. The mind evolutionary algorithm (MEA) was combined with HFSS based on finite element method and applied in antenna optimization. Antenna parameters are optimized by MEA, with the simulation performance of HFSS as the fitness...
Mind evolutionary algorithm (MEA) uses dasiasimilar taxispsila operation and dasiadissimilationpsila operation by imitating the human mind evolution to processes numerical optimization, overcoming the prematurity and improving searching efficiency. Given the determinate number and space between the antenna arrays units, the feeding-back amplitudes and phases are optimized and selected by this way...
The paper is split into two major parts: (1) the first is to look into the EM wave properties in metamaterials and to develop an efficient solvers for their designs; and (2) the second is to try to design the metamaterials for antenna applications. For the efficient algorithms developed, the integral equation solvers accelerated using the adaptive integral (equation) method (AIM) and also the pre-corrected...
In this paper, we present a novel microstrip patch antenna specifically designed using planar metamaterial patterned substrate. It is developed based on an ordinary patch antenna, and isolated triangle gaps and crossed strip-line gaps are etched on the metal patch and ground plane respectively. This patterned substrate was demonstrated in literature to have left-handed characteristics. In this way,...
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