Add two signals with given energy ratio in dB.
SIG=sigmerge(X1,X2) SIG=sigmerge(X1,X2,RATIO)
real or complex vectors of same sizes: the input signals.
a real scalar: the Energy ratio in deciBels (default : 0 dB).
a real or complex vector with same sizes as X1 and X2: the output signal.
sigmerge adds two signals so that a given energy ratio expressed in deciBels is satisfied.