a power estimation module providing {HEAD ~ a power estimation parameter} for each of said modified signals and {TAIL ~ said noise signal}; and 
for
a power estimation module providing { HEAD ~ a power estimation parameter } for each of said modified signals and { TAIL ~ said noise signal } ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH