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On physical limit of wireless digital transmission from radio wave propagation perspective
Author(s) -
Karasawa Y.
Publication year - 2016
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 - 10.1002/2016rs006040
Subject(s) - transmission (telecommunications) , radio propagation , limit (mathematics) , noisy channel coding theorem , wireless , cognitive radio , channel capacity , computer science , channel (broadcasting) , telecommunications , electronic engineering , acoustics , physics , mathematics , engineering , mathematical analysis , decoding methods , error floor , low density parity check code
Under a time‐invariant condition with thermal noise, the physical limit of digital transmission ability is governed by Shannon's channel capacity. However, in this formula, it does not contain factors on radio wave propagation environments. In other words, for the ultimate information transmission, a sufficiently long time for the coding and signal processing is expected. However, since wave propagation prevents its premise, there is another physical limit for digital transmission in a different perspective with Shannon's channel capacity. Even if the S/N ratio is sufficiently high, there is the limit for information transmission. This paper deals with this matter concerning physical limit of wireless transmission from a radio wave propagation viewpoint.