For example, {HEAD ~ the threshold frequency value} for identifying secondary correlations may be set to {TAIL ~ a predefined percentage rate} of the frequency band  
For example , { HEAD ~ the threshold frequency value } for identifying secondary correlations may be set to { TAIL ~ a predefined percentage rate } of the frequency band
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH