
396
H. Chen et al.
filter characteristics [[ a. select both peaks b. select the 1st peak c. select the 2nd peak
/
~II =
~22 -----
~
12 --
/~21 --"
7711 ----
T~22 =
?']12 ----
~21 --
r
~r2=
I~111 = I~221=
I~121 = I~211=
/~22
/~12
~21
ffl
0" 2
0
0
0
ffl
0
0
/~22
0
0
~r 2
0
Table 1: Three ideal cases of filtering using an ideal rectangular filter.
]
~
= ~ (~~ + ~~)+ I~1 + -
~2~)~
i ai2~ii
-
a22r]22
[W11[ 2 = I~J22[ 2 = 2 +
2~/44~1~11 ~ + (4~11 -
~)~
[~2112
_
1~212
_ i__
0"27"]11- 0"27"]22
(6)
2 2~/4a2a22[r]2112 + (o.12~]11_ 0.2T]22)2
H
HHvi depends on both the signal parameters and the ...