【正文】 OMPLEX CX(LX),CARG,CEXP,CW,CTEMP J=1 SC= IF()SC= SIG=SIGNI DO 30 I=1,LX IF()GO TO 10 CTEMP=CX(J)*SC CX(J)=CX(I)*SC CX(I)=CTEMP 10 M=LX/2 20 IF()GO TO 30 J=JM M=M/2 IF()GO TO 20 30 J=J+M L=1 40 ISTEP=2*L DO 50 M=1,L CARG=(,)*(*SIG*(M1))/L CW=CEXP(CARG) DO 50 I=M,LX,ISTEP CTEMP=CW*CX(I+L) CX(I+L)=CX(I)CTEMP 50 CX(I)=CX(I)+CTEMP L=ISTEP IF()GO TO 40 RETURN END10. 最小相位轉(zhuǎn)換CCCCCCCCCCCC 最小相位轉(zhuǎn)換 CCCCCCCCCCCC PROGRAM MAIM REAL B(25),B0(75) DATA B/0,1,2,3,0,1,0,1,3,5,7,9,10,8,6,4,2,0,1,0,2,3,2,0/ REAL RBB(25),Y0(25),A0(25) REAL SUMX,C(49),G(49) OPEN(1,FILE=39。,STATUS=39。,FORM=39。) WRITE(4,*)(Y_LINEAR(I),I=1,101) CLOSE(4) ENDCCCCCCCCCCCCCC 線性卷積子程序 CCCCCCCCCCCCCC SUBROUTINE CON(A,B,C,I,J,K) DIMENSION A(I),B(J),C(K) DO 1 K1=1,K 1 C(K1)= DO 2 I1=1,I DO 2 I2=1,J II=I1+I21 2 C(II)=C(II)+A(I1)*B(I2)* RETURN ENDCCCCCCCCCCCCCCC 圓周卷積子程序 CCCCCCCCCCCCCC SUBROUTINE CIRCON(X,H,Y,N) REAL X(N),H(N),Y(N) DO I=1,N Y(I)= ENDDO DO I=1,N DO J=1,N IF() Y(I)=Y(I)+X(J)*H(IJ) ENDDO ENDDO END8. 最小平方反濾波CCCCCCCCCC 兩種反射系數(shù)序列的對比 CCCCCCCCCC PROGRAM MAIN REAL B(12),R(200),X_CONV(211),RXX(211) REAL A(211),A_CONV(270) DATA B/, OPEN(1,FILE=39。,STATUS=39。,FORM=39。) DO 61 I=65,12861 XWAVE(I)= DO 62 I=1,12862 XWAVE_128C(I)=CMPLX(XWAVE(I),) CALL DFT(128,XWAVE_128C,) DO 63 I=1,12863 XWAVE_R(I)=REAL(XWAVE_128C(I)) DO 64 I=1,12864 XWAVE_I(I)=AIMAG(XWAVE_128C(I)) DO 65 I=1,12865 XWAVE_128ZS(I)=SQRT(XWAVE_R(I)**2+XWAVE_I(I)**2) WRITE(7,*)(XWAVE_128ZS(I),I=1,128) CLOSE(7) ENDCCCCCCCCCCCCCCC DFT 子程序 CCCCCCCCCCCCCCCC SUBROUTINE DFT(N,C,S) COMPLEX C(N),Y(512),W IF()Z= IF()Z=(N) DO 20 I=1,N Y(I)=(,) DO 20 J=1,N A=COS(**(I1)*(J1)/FLOAT(N)) B=SIN(**(I1)*(J1)/FLOAT(N))*(S) W=CMPLX(A,B) 20 Y(I)=Y(I)+C(J)*W DO 30 I=1,N 30 C(I)=Y(I)*Z RETURN END7. 線性褶積與循環(huán)褶積CCCCCCCCC 線性濾波與循環(huán)褶積比較 CCCCCCCCC PROGRAM MAIN CCCCCCCCCCCCC 線性濾波 CCCCCCCCCCCCCCCCCCCCCCCCCCC H是低通濾波因 CCCCCCCCCCCC PARAMETER (PI=, DT=,F=) REAL X(100),X2(101),H(50:50),Y_LINEAR(200),Y_CIRCLE(200) OPEN(1,FILE=39。,STATUS=39。,FORM=39。) WRITE(3,*)(XWAVE_60ZS(I),I=1,60) CLOSE(3)CCCCCCCCCCCCC 對補(bǔ)零數(shù)據(jù)的分析 CCCCCCCCCCCCCCCCCCCCCCCCCCCC 對函數(shù) SIN 的分析 CCCCCCCCCCCCCCCC OPEN(4,FILE=39。,STATUS=39。,FORM=39。) READ(3,*)(WAVE(I), I=1,128) DO 500 I=1,128500 X_WAVE_C(I)=CMPLX(WAVE(I),) CALL FFT(128,X_WAVE_C,) DO 600 I=1,128600 X_WAVE_R(I)=REAL(X_WAVE_C(I)) DO 700 I=1,128700 X_WAVE_I(I)=AIMAG(X_WAVE_C(I)) OPEN(4,FILE=39。,STATUS=39。,FORM=39。) OPEN(2,FILE=39。,STATUS=39。,FORM=39。) write(3,*)(Y_CZ(i),I=1,69) CLOSE(3) CLOSE(2)CCCCCCCCCCCCCCC 遞歸濾波的設(shè)計 CCCCCCCCCCCCCCCC X 存放INPUT3里數(shù)據(jù)的數(shù)組 CC Y_DNZ 為非零相位遞歸濾波，Y_DZ 為零相位遞歸濾波 CC X1,2,X,3,X4 為運(yùn)算過程中的過度變量 C A(0)= A(1)= A(2)= A(3)= A(4)= b(0)= B(1)= B(2)= B(3)= B(4)=CCCCCCCCCCCCCCC 對 A 補(bǔ)零 CCCCCCCCCCCCCCCCCC DO 40 i=5,4940 A(I)=CCCCCCCCCCCCCCC 對 B 補(bǔ)零 CCCCCCCCCCCCCCCCCC DO 50 i=5,4950 B(I)=CCCCCCC 從外部數(shù)據(jù)向 X 導(dǎo)入數(shù)據(jù) CCCCCCCCCCCC OPEN(1,FILE=39。,STATUS=39。,FORM=39。) WRITE(2,*)(Y_LOW(I),I=1,NFFT) CLOSE(2)CCCCCCCCCCC 帶通濾波因子的設(shè)計 CCCCCCCCCCC DO 70 I=1,NFFT/2 IF((I*).AND.(I*))THEN H_BAND(I)= ELSE H_BAND(I)= END IF70 CONTINUECCCCCCCCC 使濾波器理想化（對稱）CCCCCCCCCC DO 80 I=NFFT/2+1,NFFT F=I*DF H_LOW(I)=H_BAND(NFFTI+1)80 CONTINUECCCCCCCCCCCCCCC 實(shí)現(xiàn)濾波 CCCCCCCCCCCCCCCCC DO 90 I=1 , NFFT90 TEMP(I)=C(I)*H_BAND(I)CCCCCCCCCCCCCCC 向時間域變換 CCCCCCCCCCCCC CALL FFT(NFFT,TEMP,) DO 100 I=1 , NFFT100 Y_BAND(I)=REAL(TEMP(I)) OPEN(3,FILE=39。,STATUS=39。,FORM=39。) WRITE(3,*)(Y_LOW(I),I=51,150) CLOSE(3)CCCCCCCCCCCCCCCCCC帶通濾波器CCCCCCCCCCCCCCCCCCCC DO 20 I=50,50 IF()THEN H2(I)=140 ELSE H2(I)=SIN(2*PI*F2*I*dt)/(PI*I*dt)SIN(2*PI*F1*I*dt)/(PI*I*dt) END IF 20 CONTINUECCCCCCCCCCCCCCC輸出帶通濾波因子CCCCCCCCCCCCCCCCC OPEN(4,FILE=39。,STATUS=39。,FORM=39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN39。39。FORMATTED39。UNKNOWN3