In step 930, the recovery stage recovers a first set of narrowband signals wL using {HEAD ~ the sampled signals} {TAIL ~ ym} produced by the conversion stage 
In step 930 , the recovery stage recovers a first set of narrowband signals wL using { HEAD ~ the sampled signals } { TAIL ~ ym } produced by the conversion stage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH