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又是大家开始忙碌着毕业论文的时候了~~; h5 k# g& X2 m# F# A5 h0 v6 j
这个是我当时毕业论文的核心内容~~
+ j: m' u- t6 K B& Q( `( V2 q需要做信号非线性的学弟学妹 可以参考下~~ s; x* p) A2 Y
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" \4 U* f" p; [( ~+ Z: w% h; \% ffunction [shang]=jss(xdate)
! g0 I/ U- \* [$ y3 f* Q4 km=2;
3 ?2 v- n* H, I: pn=length(xdate);
, A/ s; t) b; Nr=0.2*std(xdate);
f# c( h0 f) m" a5 Ccr=[];* A L* m$ I' }1 M- F
gn=1;8 g- R- @" o6 x6 ?6 W
gnmax=m;: G6 `& n z' m5 y7 B" |6 E" Z0 F! e
while gn<=gnmax
% |% u& Q1 L: D6 j/ D! Xx2m=zeros(n-m+1,m);%存放变换后的向量
( ^. d: D1 T: N, h8 xd=zeros(n-m+1,n-m);% 存放距离结果的矩阵
$ g; k; K- P0 q" F% t3 D# @cr1=zeros(1,n-m+1);%存放0 y$ [) c& J) _5 i E8 G6 c( u
k=1;3 g5 O3 x' q" W8 ^& p$ r
for i=1:n-m+15 C% ]) a- t4 Z: h+ F
6 o7 E; x% l" _! }; V$ _3 ufor j=1:m1 _4 d# _# p9 A1 j
. P' l" m/ g O8 Z% Kx2m(i,j)=xdate(i+j-1);
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end4 z0 k, z! y; Y' s3 W2 Z4 H: x# H
x2m;, ~/ W4 p/ h6 B+ J! w0 }
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* l" C: ?2 q9 M% }$ X# v' f# \1 afor i=1:n-m+1
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* M, @1 X' d% O. c2 {8 i4 Xfor j=1:n-m+1. y0 O, ^" o- a' v
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if i~=j$ J, R9 P7 `0 w7 A7 j6 Q
! v1 M# |3 R( r# ?. Id(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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' p- Q0 R2 x. N+ T& ?1 y* Bk=k+1;, u W. e% y& c6 ^9 T
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end
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" F4 k" j6 [# B* W/ Vk=1;5 G+ X+ q, F! `7 ?. V6 M
end, J/ `) Z8 z: h- P2 V) ?7 \' g p
d;
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8 ]3 _ ?1 j. z1 R. f efor i=1:n-m+1" ~ H" g3 O! `2 j2 N
4 B# I: Z# z, d[k,l]=size(find(d(i,<r));%将比R小的个数传送给L3 k' O1 E7 G& N) B9 Y# Z" [* B
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cr1(1,i)=l;0 h9 r5 [) u* z2 H: h& e/ g
end
8 D+ y9 l2 ] n/ p+ Xcr1;
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( S" z% { P* G7 C% \* l# ecr1=(1/(n-m))*cr1;/ T8 q2 \7 a+ `# q
sum1=0;
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if cr1(i)~=0* ^5 `: Y- Z9 i9 |
* n2 U* M' W3 u! K ~, T1 |sum1=sum1+log(cr1(i));
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end
- w* @7 s% `( p( _end
3 J6 c6 R, z2 K0 I) a+ Q6 Xcr1=1/(n-m+1)*sum1;
6 d+ P# u# O! m# e' t, Ccr(1,gn)=cr1;
6 L& G# T7 C b2 zgn=gn+1;
$ D, F& n( b4 k2 n4 A+ G& |% Dm=m+1;
. {$ b3 |* a- Nend
1 @% ]0 k8 e3 e6 J% J2 O9 ]cr;
8 N2 h9 {3 e1 {0 q! `- q+ V. Oshang=cr(1,1)-cr(1,2);
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- r y& |/ B/ e# M6 Jfunction [shang]=ybs(xdate)
+ \0 C# I, o$ a: c* Nm=2;% O+ u+ q# e- S+ h
n=length(xdate);( }: Z+ E: ?# W1 |( B+ B3 ], J- {
r=0.2*std(xdate);
1 w! Q) h0 p) W( R" t4 X+ m2 c8 i! ucr=[];
* O" M* i9 x9 N& w; M" Ogn=1;
$ r" A# z7 o( I( A/ `( Pgnmax=m;
* o0 L* {; P* N. `9 ~) Mwhile gn<=gnmax
/ A* n% V; _! v7 U+ P ~x2m=zeros(n-m+1,m);%存放变换后的向量; Z8 }6 E9 x9 G: j1 F. A6 ^: B4 z- ]
d=zeros(n-m+1,n-m);% 存放距离结果的矩阵0 x, Y* r9 o% {- Q1 A- j
cr1=zeros(1,n-m+1);%存放
3 W2 W' ~) q* m. f0 Pk=1;
8 _5 j- i, ?: T! s2 k+ g' ?for i=1:n-m+11 s) H1 i! E1 t, x, W& z
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$ S- l/ M4 p1 }( D* `8 s: sx2m(i,j)=xdate(i+j-1);2 P8 X' N: ?4 o& I- d5 S
$ O; x- U& y$ M2 m1 i! Gend
2 U8 C7 C$ O0 j# B/ @+ Oend
- D7 t/ e% q) D8 h% q) P! Fx2m;
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; z6 `& ]* t9 ^2 Wfor i=1:n-m+1( {; p2 q7 ]/ i& s4 o B+ D! p- d4 p
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for j=1:n-m+1- S6 F5 R# |( K
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if i~=j4 s3 ]% ~+ z3 t* K6 e6 w
1 a: `' {, f; _+ a2 ed(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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0 A1 Y; E' J% x, ?" f/ Xk=k+1;
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end, d" G& P: ~/ |8 R6 N, D
- X8 ^- t5 o6 f4 O6 p! x! X! q& Nk=1;
& o8 b+ R7 s# b- q+ b# `) p5 ~end
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for i=1:n-m+1
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[k,l]=size(find(d(i,<r));%将比R小的个数传送给L7 ]5 R T) K# V8 e
. ~8 m F# A1 bcr1(1,i)=l;* R- N& e. H% p+ p! g3 _ P2 e
end
. k4 {# h+ F* u/ ]. _' {cr1;
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cr1=(1/(n-m))*cr1;7 ]4 A1 o3 v! `
sum1=0;1 u r8 x* h1 M! b2 w. g* {
for i=1:n-m+1
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2 \0 [5 ~' y! q. ssum1=sum1+cr1(i);# H, B: k! z9 }" n: @. b1 x
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end/ Y9 W- L: n4 S) Y7 X/ H
end9 e% Y" E* ?2 U3 V' W
cr1=1/(n-m+1)*sum1;$ h' z0 f6 A$ g2 h
cr(1,gn)=cr1;
2 u# Y& c# N( e) ^2 M4 G' Sgn=gn+1;
. H% D0 ^) J2 A* p( \, pm=m+1;$ m) y* U- V: r9 {! }
end, K9 Q4 Q' Z( Z2 W% t5 Q9 G
cr;9 a d! p% E8 x+ L1 M" H9 n7 Q6 T
shang=-log(cr(1,1)/cr(1,2));4 F( b7 y: U+ j. F# F' e! [
9 y" Z) B U2 ?9 {+ [% ?2 }+ {7 g[ 本帖最后由 刹那公子 于 2008-12-27 22:30 编辑 ] |
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