ofdmwaterfilling.m

已知信道状态信息情况下的基于注水法功率分配的OFDM系统 并且和其它系统比较

function [shanonCapacity powerAllocated] = ofdmwaterfilling(...
    nSubChannel,totalPower,channelStateInformation,bandwidth,noiseDensity);
%
%==========================================================================
% by: 
%   Hamid Ramezani
%   my email : [e-mail]
%
% Date:
%   20 OCT 2006 , version 1
% 
%
% to maximize the capacity of a frequency selective channel, the
% waterfilling algorithm is used. OFDM modulation devides the total
% bandwidth into N subchannels. Large number of subchannels cause each
% subchannel experience a flat fading channel if the proper cyclic prefix
% is added to the end of each OFDM symbol. The waterfilling algorithm
% assigns more power to subchannels which experience good condition and may
% assign no power to bad conditioned subchannels (subchannels withdeep fading).
%
%   for further information see:
%     J. A. C. Bingham, 揗ulticarrier Modulation for Data Transmission:
%     an Idea whose Time Has Come,