Furthermore, {HEAD ~ the embodiments} provide a method of reducing {TAIL ~ the condition} of the deterministic correlation matrix used in the least squares method 
Furthermore , { HEAD ~ the embodiments } provide a method of reducing { TAIL ~ the condition } of the deterministic correlation matrix used in the least squares method
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH