Using (66a), we find that the ith element of the vector [Φ]*5 is given by
J,
Hm>
Jn¥i
s,
°
wh
- * -
(
-
'Wl
si
"
ΝΤΊ <
108
»
where we have used (97). Substituting this and (66a) in (107), we get for the
rath element of [β] ~
l
b
2a ]L fl _ . . „ . ίπ ) . nin
Λ
^
ϊνΤΤ Σ t
c
"
( - ^
sin
ÄTTTj
sin
ÄT+T
»= ^'
·
-
N
(109)
As was the case with (103), the operation here may again be expressed as a
DFT summation by padding with zeroes the data vector whose elements are
given by the expression inside the curly braces in (109). The DFT summation
may then be computed by using an FFT algorithm.
Step 2. The Ν element vecto ...
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