Line enhancer code in Matlab

Hello all,

Can anyone tell me the code for a line enhancer with white gaussioan noise of SNR=10 dB.

I tried this one, but it's not working like line enhancer:

sig = 4.5*(sin(2*pi*(0:1:1999)*(1/10)));
noise=wgn(1,length(sig),0); 
sig_plus_noise = sig + noise;
s=(sig_plus_noise)';
snr(sig,noise);

Thank you,

Shruthi Sampathkumar

[Walter Roberson]

You calculate the signal to noise ratio there, but I do not see any code that attempts to "enhance" a line? Unless adding noise to the line is considered to be enhancing it??

[Shruthi Sampathkumar]

Is my code (sig) correct for a line enhancer? Should it be some cos function?

Thank you

[Walter Roberson]

Your sig is the input signal, not a signal used to control the line enhancement. It is whatever it is. It could be music.

http://www.mathworks.com/help/dsp/examples/adaptive-line-enhancer-ale.html#zmw57dd0e5505

[Image Analyst]

No, that does not make an enhanced line. You're simply adding noise to a sine wave. To enhance it you might try a filter, like using conv() with a kernel with positive and negative weights or something.