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