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又是大家开始忙碌着毕业论文的时候了~~
7 T) U3 p& x& U& r1 b) C C+ r这个是我当时毕业论文的核心内容~~3 H2 n* u! M3 a9 u* Y
需要做信号非线性的学弟学妹 可以参考下~~
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function [shang]=jss(xdate)# a9 _$ n# p3 H; M
m=2;
( I) e/ |/ E4 [2 y* [n=length(xdate);
7 D6 x! w { n; F* J, sr=0.2*std(xdate);: W4 d/ E0 p. t5 B
cr=[];
7 B5 s# |0 O4 w8 Ugn=1;
2 R, F2 j* x1 u1 Dgnmax=m;
& N; ` n7 J' y' E" j) zwhile gn<=gnmax
3 ~: z ?! M- d- Y6 f9 Jx2m=zeros(n-m+1,m);%存放变换后的向量3 ~- V8 x: d/ R+ G2 Z! J7 c
d=zeros(n-m+1,n-m);% 存放距离结果的矩阵
4 q" [. a6 V ycr1=zeros(1,n-m+1);%存放0 r. u) I. ?0 }$ W1 w2 ^$ E7 \
k=1;
( T! o5 u, q a$ d! zfor i=1:n-m+1
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for j=1:m# d& K% j# v% c) ~, [
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x2m(i,j)=xdate(i+j-1);7 E# m; g6 F! D5 X% P
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end. t5 h$ F. v# l) N3 z
end
4 T3 p. n8 S2 }1 w5 @, Ix2m;+ I' C' |. |+ d4 R$ V! ]: u' ^; m
/ R8 p1 s% T, u3 `- W3 K* B# R8 ~
9 c; { D0 q: C) S7 K# G' B2 cfor i=1:n-m+1
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' V& y" s1 ^2 K, q8 q: w/ t5 K" M) ?for j=1:n-m+1& K l' J% G2 @1 R) p/ d' M
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if i~=j
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d(i,k)=max(abs(x2m(i,-x2m(j,));%计算各个元素和响应元素的距离* |6 q/ y4 R2 ~- a
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k=k+1;
* U, |' _! e6 a0 M6 k7 p, g( f, S3 X+ d
end
% b4 t* Z0 B" g, @end
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' ^& J' ]4 b! h' e. c* J" Kk=1;
9 m$ p1 T* |+ Q; O+ X5 Lend
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# a) {8 H: E! v9 U; N2 b' @
; b) w/ i7 C# K: ^+ N7 Cfor i=1:n-m+17 e; N+ ~ Z; h3 F
# \, m; z# R/ l6 K a# u1 K[k,l]=size(find(d(i,<r));%将比R小的个数传送给L. C7 u. o" D$ ~8 G E
0 G5 I# r! t4 x! ~. ycr1(1,i)=l;
! _+ i) S5 l7 A! r+ jend' S: o( n6 m! Y0 T
cr1;
& P, b9 k- a( h/ n5 ]5 t7 C1 l" e/ R
cr1=(1/(n-m))*cr1;0 \' p8 K- a( S: @. b l
sum1=0;
% v! ~! G6 c) T% O. T. _for i=1:n-m+1
# K8 s9 o1 v9 z% n7 ?8 q3 j$ R7 e9 \# _# i& @5 d0 e
if cr1(i)~=0% Z" ^$ [% y" G' z5 y
* v5 p; H k2 t; T# x' q- s$ fsum1=sum1+log(cr1(i));
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end6 L4 i: Q; B/ a
end2 n2 h8 r( ?& x k; O
cr1=1/(n-m+1)*sum1;" M" B* W9 I; U' V
cr(1,gn)=cr1;; i- f: j. S& v K, Q
gn=gn+1;
]1 p. w! h7 hm=m+1;
8 I( K( o# Q6 V }$ Nend
. W; M ?( F& r+ y- H; x8 Pcr;1 G9 c% l' H2 b$ b& Q9 t3 @" X
shang=cr(1,1)-cr(1,2); 1 H+ g Y) ~/ }. E. b
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& K% L5 X9 q. o0 S! H' {function [shang]=ybs(xdate)
' a0 i3 l+ s6 A, B; p6 v4 `/ t8 ^6 l2 Am=2;
' j, ~5 |# P" a4 d u' {5 rn=length(xdate);/ ^* Z/ {' O& H' F" f$ _
r=0.2*std(xdate);
3 ~* ^* e# c4 c8 O# ~cr=[];
# A0 n- Z' N7 _3 c: ^1 bgn=1;* [" p/ I+ P7 m
gnmax=m;
; @$ m" H2 }. r1 d: j/ j( ?while gn<=gnmax0 k2 ^3 o9 Z" X/ P' Y! g
x2m=zeros(n-m+1,m);%存放变换后的向量' b1 n0 C: f5 z5 P1 H1 n r, P
d=zeros(n-m+1,n-m);% 存放距离结果的矩阵
5 |) @" w3 N9 a( M; |% U! xcr1=zeros(1,n-m+1);%存放
, ^4 L3 B" ^% d U1 b6 o @1 C1 Ok=1;) c: c( V. I+ \. }% a7 v7 Z
for i=1:n-m+1
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for j=1:m
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x2m(i,j)=xdate(i+j-1);) x" m/ r+ F& L+ n
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end
5 C9 _: M% J2 v9 n+ eend
/ j' k+ a% G3 s6 z- ~x2m;3 p/ x7 g3 ~, {' y/ K/ G" [
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for i=1:n-m+1; U( V4 \# d# T- X
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for j=1:n-m+1
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- |4 [: @/ T3 b U. U% ~if i~=j
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6 _% { I c! f, o) M$ Sd(i,k)=max(abs(x2m(i,-x2m(j,));%计算各个元素和响应元素的距离
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, R2 _" S& V! z# nk=k+1;
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end7 O: G& }" u" H5 G# b
end e& t, _% n4 J0 E: u$ A! ?8 N l
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k=1;
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d;
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for i=1:n-m+1: a- R( a# @" b- s
3 _5 L L$ c a7 ][k,l]=size(find(d(i,<r));%将比R小的个数传送给L
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cr1(1,i)=l;
& ^2 J3 f- ^. J5 O9 A4 k8 r& Uend
" E2 m0 v( L' j. w. g8 |9 _cr1;) l4 W( l- c# |" J; Z7 o( u" z3 u
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cr1=(1/(n-m))*cr1;/ k4 l7 d7 t( B% `6 W' U
sum1=0;. L4 y& j) D. z. k# E
for i=1:n-m+1
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sum1=sum1+cr1(i);
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end
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cr1=1/(n-m+1)*sum1;) x1 m y3 C- `. q
cr(1,gn)=cr1;( T9 \; Y# p& ^( x0 Q% G( i
gn=gn+1;
" y0 I4 m$ Z3 `m=m+1;: T+ w+ e$ O" S+ u2 J: H
end+ p6 K' `0 }2 E, Q+ T5 M; k7 Z
cr;
: p" h+ M' J- x7 j M/ {$ k3 Eshang=-log(cr(1,1)/cr(1,2));
+ Y0 c* U, n5 y, ` X/ r7 s0 Z' m. h2 }0 l7 @+ y
[ 本帖最后由 刹那公子 于 2008-12-27 22:30 编辑 ] |
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