Download - 第五章 信号处理初步
Transcript
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CAT
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12 3 4
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s(t)x(t)Ts1/Ts=fs
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1 FT Tx(t),t=0x(n)
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2
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3
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1X(f)1/Ts
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2fs
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2
fc
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A/DA/Db,D
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1A/DA/D2
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sincx(t)
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1 FT
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2()
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ff=fs/N=1/TDFT()
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T2/T-13dB,20% 20dB/10)
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T/24/T
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T/24/T2.4% -32dB60dB/10