National Key RD Program of China Grant(2018YFB1801504);the President Funding of China Academy of Engineering Physics with No.YZJJLX2018009.
In terahertz communication,the direct frequency conversion structure in which orthogonal mixer is the main frequency conversion unit,makes engineers get into trouble of in-phase(I)branch and quadrature(Q)branch imbala...
supported in part by the the National High Technology Research and Devel-opment Program of China(Grant No.2014AA01A701);National Natural Science Foundation of China(Grant No.61361166005);the State Major Science and Technology Special Projects(Grant No.2016ZX03001020006);the National Program for Support of Top-notch Young Pro-fessionals;the Science and Technology Development Project of Beijing Municipal Education Commission of China(Grant No.KZ201511232036)
In this paper, a quasi-Newton method fbr semi-blind estimation is derived for channel estimation in uplink cloud radio access networks (C-RANs). Different from traditional pilot-aided estimation, semiblind estimatio...