Hiroaki Kobayashi Shun Kojima Kazuki Maruta Takatoshi Sugiyama Chang Jun Ahn
ICT Express 9(1) 57-62 2022年
Spectrum sharing in the spatial domain among the plurality of wireless communication systems should be addressed due to its exhaustion. We previously conceptualized a spectrum superposing enabled by subcarrier transmission power assignment (STPA) ...
Kakeru Matsubara Shun Kuroki Koki Ito Kazushi Shimada Kazuki Maruta Chang Jun Ahn
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E104A(9) 1345-1348 2021年
This letter expands the previously proposed High Time Resolution Carrier Interferometry (HTRCI) to estimate a larger amount of channel status information (CSI). HTRCI is based on a comb-type pilot symbol on OFDM and CSI for null subcarriers are in...
He He Shun Kojima Takaki Omura Kazuki Maruta Chang Jun Ahn
Radioengineering 30(4) 695-703 2021年
In the high-speed mobile environment, channel state information (CSI) estimated at the beginning of the packet is quite different at the last part because the actual channel state changes with time. To overcome this problem, a neural network (NN) ...
大学院国際学術研究院