olemus
teave, mis kirjeldab traadita sidekanali signaalileviomadusi, eelkõige amplituudi ja faasi muutumist
= a characterization of propagation channel between transmitter and receiver

ülevaateid
https://en.wikipedia.org/wiki/Channel_state_information
http://www.sharetechnote.com/html/Handbook_LTE_CSI.html
https://www.hindawi.com/journals/wcmc/2021/6636665/

turvalisus
https://kabru.eecs.umich.edu/papers/publications/2014/paper-ccs.pdf
https://core.ac.uk/download/pdf/42415209.pdf
https://cpb-us-e1.wpmucdn.com/blogs.rice.edu/dist/2/3274/files/2017/05/CSIsnoop_Xu-1pybdex.pdf