資源簡介
1、 計算真實的自相關值時,采用逆Levinson-Durbin遞歸方法,由a、b參數得到 , , , ,其中 為濾波器的階數,再采用公式 外推得到 的自相關值;
2、 實際功率譜 , 可調用Matlab中的FFT算法得到;
3、 自相關序列的估計值采用公式 得到;
4、 采用各種功率譜估計方法對功率譜進行估計。

代碼片段和文件信息
function?[aerr]?=?acm(xp)
%ACM Find?an?all-pole?model?using?the?autocorrelation?method
%----
%Usage:?[aerr]?=?acm(xp)?
%
% The?input?sequence?x?is?modeled?as?the?unit?sample?response?of
% a?filter?having?a?system?function?of?the?form
% H(z)?=?b(0)/A(z)?
% where?the?coefficients?of?A(z)?are?contained?in?the?vector
% a=[1?a(1)?...?a(p)]
% The?input?p?defines?the?number?of?poles?in?the?model.
% The?modeling?error?is?returned?in?err.
% The?numerator?b(0)?is?typically?set?equal?to?the?square
% root?of?err.
%
%??see?also?COVM?PADE?PRONY?SHANKS
%
%---------------------------------------------------------------
x???=?x(:);
N???=?length(x);
if?p>=length(x)?error(‘Model?order?too?large‘)?end
X???=?convm(xp+1);
Xq??=?X(1:N+p-11:p);
a???=?[1;-Xq\X(2:N+p1)];
err?=?abs(X(1:N+p1)‘*X*a);
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????24879??2008-12-03?22:44??AR過程的線性建模與功率譜估計\程序\v1.mat
?????文件????????715??2008-11-18?20:35??AR過程的線性建模與功率譜估計\程序\v.mat
?????文件????????802??2002-11-24?02:27??AR過程的線性建模與功率譜估計\程序\acm.m
?????文件????????457??2002-10-08?22:43??AR過程的線性建模與功率譜估計\程序\atog.m
?????文件????????582??2002-10-08?22:42??AR過程的線性建模與功率譜估計\程序\ator.m
?????文件????????841??2008-11-19?11:27??AR過程的線性建模與功率譜估計\程序\burg.m
?????文件????????968??2002-10-08?22:43??AR過程的線性建模與功率譜估計\程序\convm.m
?????文件????????335??2002-10-08?22:44??AR過程的線性建模與功率譜估計\程序\covar.m
?????文件????????680??2008-11-19?10:43??AR過程的線性建模與功率譜估計\程序\covm.m
?????文件????????681??2002-10-08?22:45??AR過程的線性建模與功率譜估計\程序\durbin.m
?????文件????????112??2008-11-01?14:24??AR過程的線性建模與功率譜估計\程序\E_r.m
?????文件????????823??2002-10-08?22:45??AR過程的線性建模與功率譜估計\程序\fcov.m
?????文件????????591??2002-10-08?22:45??AR過程的線性建模與功率譜估計\程序\glev.m
?????文件????????435??2002-10-08?22:45??AR過程的線性建模與功率譜估計\程序\gtoa.m
?????文件????????666??2002-10-08?22:45??AR過程的線性建模與功率譜估計\程序\gtor.m
?????文件????????823??2008-11-19?10:42??AR過程的線性建模與功率譜估計\程序\mcov.m
?????文件???????3053??2008-11-18?20:37??AR過程的線性建模與功率譜估計\程序\r_e.mat
?????文件???????3053??2008-11-18?20:37??AR過程的線性建模與功率譜估計\程序\r_real.mat
?????文件????????638??2002-10-08?22:48??AR過程的線性建模與功率譜估計\程序\rtoa.m
?????文件????????608??2002-10-08?22:49??AR過程的線性建模與功率譜估計\程序\spike.m
?????文件???????1816??2008-12-03?20:35??AR過程的線性建模與功率譜估計\程序\test2.asv
?????文件???????4269??2009-01-06?00:01??AR過程的線性建模與功率譜估計\程序\test2.m
?????文件???????3294??2009-01-06?00:00??AR過程的線性建模與功率譜估計\程序\test2_var.m
?????文件?????????61??2009-01-06?00:11??AR過程的線性建模與功率譜估計\程序\Read?me.txt
?????文件?????188928??2009-02-25?16:43??AR過程的線性建模與功率譜估計\實驗二.doc
?????目錄??????????0??2009-01-06?00:09??AR過程的線性建模與功率譜估計\程序
?????目錄??????????0??2009-01-05?22:47??AR過程的線性建模與功率譜估計
?????文件???????3543??2009-02-01?16:19??使用幫助:新手必看.htm
?????文件????????183??2009-02-02?09:47??Matlab中文論壇--助努力的人完成畢業設計.url
-----------?---------??----------?-----??----
............此處省略2個文件信息
評論
共有 條評論