In some embodiments, the method includes using {HEAD ~ an up conversion stage} to up convert {TAIL ~ a recovered narrowband signal} to produce a suppression signal 
to up convert
In some embodiments , the method includes using { HEAD ~ an up conversion stage } to up convert { TAIL ~ a recovered narrowband signal } to produce a suppression signal
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH