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A bound is derived for the extent to which narrowband knowledge of a multipath field inside a spatially limited region can be extrapolated beyond that region. The bound is independent of any model which may be applied to the multipath field, relying on the field being a solution to the homogeneous Helmholtz wave equation. The bound has implications for the extent and reliability of long range channel prediction particularly when the multipath is diffuse.
Telecommunications, 2003. ICT 2003. 10th International Conference on (Volume:2 )
Date of Conference: 23 Feb.-1 March 2003