I've tried running this code but unfortunately it doesn't work because of the 'symPower' is unrecognizable function or variable. Would definitely appreciate the help. Thanks

function [powerFactor,decOrder] = allocatePower(symPower,gainH,targetSNR_1,targetSNR_2,nVar)

% This function is to allocate transmit power to users based on their

% channel gain. The power is allocated to make both users achieve a target

% SNR.

[numUE,numSC] = size(gainH);

% Channel gain levels

gainDiff = diff(gainH,[],1); % column2-column1

highGain(logical(gainDiff<0)) = 1;

highGain(logical(gainDiff>0)) = 2;

lowGain(logical(gainDiff>0)) = 1;

lowGain(logical(gainDiff<0)) = 2;

highGain = highGain.';

lowGain = lowGain.';

% Calculate power allocation factor

powerFactor = zeros(numSC,numUE);

for sc = 1:numSC

lowPower = targetSNR_2*nVar./(symPower*gainH(highGain(sc),sc));

highPower = (targetSNR_1*(lowPower.*symPower*gainH(highGain(sc),sc)+nVar))./symPower*gainH(lowGain(sc),sc);

highPowerFactor = highPower./(highPower+lowPower);

lowPowerFactor = lowPower./(highPower+lowPower);

powerFactor(sc,highGain(sc)) = lowPowerFactor;

powerFactor(sc,lowGain(sc)) = highPowerFactor;

end

decOrder = zeros(numSC,numUE);

[~,decOrder(:,1)] = max(powerFactor,[],2);

[~,decOrder(:,2)] = min(powerFactor,[],2);

Output: allocatePower(symPower, gainH, targetSNR_1, targetSNR_2, nVar)

Unrecognized function or variable 'symPower'.

Answer 1

[Vijay]

Hello @Kaeshwin

Please make sure all variables are defined before using them.

For example

symPower, on of the variables used while calling, must be defined first

you need to define all the variables before calling the function allocatePower.

Example Values:

 symPower = 1; 
 gainH = 0.2;
 targetSNR_1 = 10;
 targetSNR_2 = 20;
 nvar=100;
 %above values are just for example, please chose suitable values.
 [output_1, output_2] = allocatePower(symPower, gainH, taragetSNR_1, targetSNR_2, nvar);