1.

If hlp(n) denotes the impulse response of a low pass filter with frequency response Hlp( ), then what is the frequency response of the high pass filter in terms of Hlp( )?

A. H<sub>lp</sub>( - /2)
B. H<sub>lp</sub>( + /2)
C. H<sub>lp</sub>( - )
D. H<sub>lp</sub>( + )
Answer» D. H<sub>lp</sub>( + )


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