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[求助]
matlab设计滤波器
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请分析下面信号频谱特性，假设信号中只有一级谱是有用的，请设计算法将信号频谱搬到低频端，并降低其采样频率。分别设计相应的IIR和FIR滤波器，并比较它们的处理效果。（用matlab设计） b = Columns 1 through 10 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 11 through 20 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 21 through 30 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 31 through 40 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 41 through 50 6.3263 3.0322 2.3353 1.8804 0.1307 2.5340 4.0230 4.0551 6.6121 6.0307 Columns 51 through 60 4.1347 4.5674 2.2302 0.5552 1.9557 1.1048 1.6680 4.5403 4.3344 5.0472 Columns 61 through 70 6.9883 5.3526 4.6984 5.2702 2.7150 1.7444 2.4977 0.5975 0.4842 2.2942 Columns 71 through 80 1.4321 1.9511 4.3514 3.8697 4.1247 6.3415 5.6769 5.1189 6.8250 5.9865 Columns 81 through 90 4.6274 5.8876 5.2367 3.3724 4.3004 4.1967 2.1623 2.7247 3.3316 1.4410 Columns 91 through 100 1.4770 2.7115 1.2823 0.6441 2.1911 1.5320 0.2478 1.6208 1.9304 0.3159 Columns 101 through 110 0.9973 2.2067 0.8489 0.5253 2.1911 1.7457 0.5646 1.9526 2.7773 1.4410 Columns 111 through 120 1.8744 3.6752 3.1620 2.5035 4.3004 5.1934 4.0832 4.7167 6.5291 5.9865 Columns 121 through 130 4.9877 6.2057 6.6936 4.8470 4.1247 4.9498 3.8455 1.6264 1.6388 2.2942 Columns 131 through 140 0.9569 0.0966 1.8002 3.1559 2.7150 3.4615 5.8686 6.5184 5.2083 5.0472 Columns 141 through 150 5.6035 3.9959 1.4040 1.0391 1.9557 1.5889 1.3442 3.4999 6.0178 6.0307 Columns 151 through 160 4.9066 4.9009 4.5742 2.2177 0.1307 0.9803 3.2043 4.1178 4.4260 5.6910 Columns 161 through 170 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 171 through 180 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 181 through 190 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 Columns 191 through 200 7.0000 5.6910 5.1910 6.8090 6.3090 5.0000 6.3090 6.8090 5.1910 5.6910 请大家多多指点，谢谢！ |
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2楼2007-10-11 19:39:05
