Water Filling Algorithm软件

The Water Filling Algorithm with a power constrain to approach Shannon capacity of the channel.

软件应用简介

WFILL: The Water Filling algorithm. 

WLINE = WFILL(VEC, PCON, TOL) performs the water filling algorithm with the given total power constrain to approach Shannon capacity of the channel.

The water filling algorithm is based on an interative procedure, so the tolerance must be assigned to determine the end-of-loop.

VEC is a noise absolute or relative level in LINEAR units at different frequencies, space or whatever bins. PCON is a total power constrain given in the same units as the VEC. TOL is an acceptable tolerance in the units of VEC. WLINE indicates the WATERLINE level in units of VEC so that:

abs(PCON-SUM(MAX(WLINE-VEC, 0)))<=TOL 



The algorithm is built such a way that PCON>=SUM(MAX(WLINE-VEC, 0)) and never 

PCON<SUM(MAX(WLINE-VEC, 0)).

VEC must be a row vector representing a noise level. PCON and TOL must be scalars in the same units as VEC.

Example: 



Input: VEC=[1 3 5 4] 

PCON=7 

TOL=1e-5

Output: WLINE=5

界面展示

结果示意

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