llr calculation in matlab code

In matlab for demodObj we use modem.qamdemod(modObj,'OutputType', 'bit','DecisionType','approximate lLR', 'NoiseVariance',sigma^2) can any body help me in how the llr is implemented in this part?

Answer 1

[Samuel Joseph]

See here -- https://www.mathworks.com/help/comm/ug/digital-modulation.html#brc6yjx