rayleigh distributed value syntax to the despread signal

• randomnumber = raylrnd(1)
• log_randomnumber = log(randomnumber)
• root = sqrt(log_randomnumber)
• tau = (-2)*root

I am trying to include the rayleigh distribution values in the despreading process of my program. I have a depsreaded signal at the end of receiver which is in numrical values which are then converted to 0 and 1 (i.e the positve number will be 1 and negatives will be 0) how should i include this value present in tau to the despreaded signal