Plot the power function P(x)=sinc^2(x)(mW) from -5πx5π

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Brooks Nelson 2018-2-6

评论： Walter Roberson 2018-2-6

I am using the following.

x=-5*pi:pi/100:5*pi;
mW=0:.02:1;
P= sinc^2*(x)*(mW);         <--- I get an error hear

I am supposed to ignore the divide by zero warning.

Plotting the power in mW from 0 to 1mW.

Plotting the power in dBm from -30 to 0dBm.

Walter Roberson 2018-2-6

sinc = randn();    %you did not define it
P = sinc^2*(x.')*(mW);
plot(x, P)

Somehow I doubt you will be pleased with the output.

Walter Roberson 2018-2-6

I wonder if you were trying to indicate

P = sinc(x).^2 .' * mW;
plot(x, P)

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