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Investigation of MIMO Channel Characteristics in Tunnel at 1.4725 and 6 GHz
Author(s) -
Sun Rongchen,
Lei Yuchen,
Chen Zengmao,
Sun Zhiguo
Publication year - 2020
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2020rs007063
Subject(s) - mimo , channel (broadcasting) , wideband , delay spread , singular value , computer science , path loss , control theory (sociology) , wireless , telecommunications , electronic engineering , engineering , physics , fading , eigenvalues and eigenvectors , control (management) , quantum mechanics , artificial intelligence
In recent years, high‐speed railway and subway are being built rapidly in China. Tunnel scenario is a major scenario in some of the high‐speed railways and most of the subways. Channel characteristic is the decisive condition of wireless communication system design in tunnel. The availability of multiple‐input multiple‐output (MIMO) in tunnel is an important issue in the next generation communication network. This paper presents results from a wideband measurement campaign at center frequency of 1.4725 and 6 GHz in a tunnel laboratory. The path loss, root‐mean‐square delay spread (RMS‐DS) characteristics by single‐input single‐output (SISO) measurement and the angle spread, channel matrix singular values, and MIMO capacity at various link distances by MIMO measurement are illustrated. and these provide insights for MIMO system deployment. And also, the threshold of singular value for channel matrix rank reduction is given.