Consider the analog signal cos(2 ? fo t) with fo = 2 kHz. A value of fs is chosen that produces aliasing. If the aliasing frequency equals fa = 200Hz, the sampling rate fs that caused this aliasing can be either ____ kHz or ____ kHz.

Fill in the blank(s) with the appropriate word(s).


fa = |fs– f0| = 200 Hz ? fs– f0 = + 200 Hz. Hence, fs = 2,000 - 200 = 1800 = 1.8 kHz or fs = 2,000 + 200 = 2200 = 2.2 kHz.

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