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Performance Evaluation of WiMAX/IEEE 802.16 OFDM Physical Layer - page 101 / 107

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for tap=1:L paths_r(:,tap,:)=correlation_matrix*squeeze(paths_r(:,tap,:)); end

for i=1:ch_no paths_r(i,:,:)=squeeze(paths_r(i,:,:)); end

for tap=1:L paths_r(1:end,tap,1:end)=IEEE80216params.channel.paths_c(tap)+paths_r(1:end,tap,1:end); end

% coeff. normalization p a t h s _ r = I E E E 8 0 2 1 6 p a r a m s . c h a n n e l . N o r m f a c t * p a t h s _ r ;

%%% IEEE 802.16 model Parameters

function IEEE80216params=IEEE80216_params()

%%%%OFDM SYMBOL PARAMETERS %%% primitive OFDM symbol parameter

IEEE80216params.Ofdm.BW=1.75*10^6 %nominal channel bandwidth IEEE80216params.Ofdm.Nused=200; %number of used subcarrier %% sampling factor BW=IEEE80216params.Ofdm.BW/(10^6); if (rem(BW,1.75)==0) IEEE80216params.Ofdm.n=8/7; else if (rem(BW,1.5)==0) IEEE80216params.Ofdm.n=86/75; else if (rem(BW,1.25)==0) IEEE80216params.Ofdm.n=144/125; else if (rem(BW,2.75)==0) IEEE80216params.Ofdm.n=316/275; else if(rem(BW,2.0)==0) IEEE80216params.Ofdm.n=57/50; else %otherwise IEEE80216params.Ofdm.n=8/7; end end end end end

IEEE80216params.Ofdm.G=1/4 % ratio of CP time to useful time

90

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