基于dsp的數(shù)字濾波器的設計-資料下載頁
2025-06-26 17:11本頁面
【正文】 208, 337, 330, 176, 72 .word 316, 445, 392, 156, 178, 475, 599, 470, 108 .word 361, 745, 857, 594, 6, 748, 1336, 1456, 893 .word 386, 2192, 4154, 5816, 6768, 6768, 5816, 4154, 2192 .word 386, 893, 1456, 1336, 748, 6, 594, 857, 745 .word 361, 108, 470, 599, 475, 178, 156, 392, 445 .word 316, 72, 176, 330, 337, 208, 7, 180, 278 .word 256, 132, 35, 174, 231, 191, 76, 61, 162 .word 191, 140, 37, 72, 144, 151, 96, 5, 82 .word 131, 124, 70, 7, 73, 101, 83, 29, 37 .word 88, 106, 85, 39, 11, 44, 44, 11, 42 .word 96, 131, 136, 110, 62, 8, 36, 61, 64 .word 85 內容：.title .mmregs.global _c_int00ORDER .set 154D_LEN .set 1024 。 The Length of Input Data15xn .usect xn, (ORDER1)a0 .usect a0, (ORDER1)input .usect input, D_LENoutput .usect output, D_LEN.copy 。 Get coefs from .text.asg AR0, FIR_INDEX.asg AR2, FIR_DATA.asg AR3, FIR_COEF.asg AR5, DATA_IN.asg AR6, DATA_OUT_c_int00:SSBX FRCT STM a0,FIR_COEF 。 Copy a0(coefs) to FIR_COEF(AR3) RPT ORDER1 MVPD coeff,*FIR_COEF+ STM 1, FIR_INDEX STM xn, FIR_DATA 。 Copy xn(data) to FIR_DATA(AR2) RPTZ A,ORDER1 STL A, *FIR_DATA+STM (xn+ORDER1), FIR_DATASTM (a0+ORDER1), FIR_COEFSTM input, DATA_IN 。 Get data from inputSTM output, DATA_OUT 。 Write data to outputSTM D_LEN1, BRCRPTBD next1STM ORDER, BKLD *DATA_IN+, AFIR: STL A, *FIR_DATA+%16RPTZ A, (ORDER1)MAC *FIR_DATA+0%, *FIR_COEF+0%, A 。 FIRSSTH A, *DATA_OUT+nextFIR_END:B FIR_END.end 的程序如下：fs=40000。 %/采樣HzN=1024 %數(shù)據(jù)個數(shù)T=1/fs。 %采樣周期n=0:N1。df=n*(fs/N)%待濾波信號波形xin=randn(1,1024)figure(1)plot(xin)%待濾波信號頻譜xinff=abs(fft(xin))。figure(2)plot(df,xinff)%濾波后信號波形y_filter_out=filter(B,1,xin)% Y = FILTER(B,A,X)figure(3)plot(y_filter_out)%濾波后信號頻譜yff=fft(y_filter_out)。figure(4)plot(df,yff)xin=xin/max(xin)。%歸一化xto_ccs=round(32767*xin)%取整fid=fopen(39。39。,39。w39。)。%打開文件fprintf(fid,39。1651 1 0 0 0\n39。)。%輸出文件頭fprintf(fid,39。%d\n39。,xto_ccs)。%輸出fclose(fid)。
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