In binary frequency shift keying (FSK), the given signal waveforms areu0(t) = 5 cos(20000πt); 0 ≤ t ≤ T, andu1(t) = 5 cos(22000πt); 0 ≤ t ≤ Twhere T is the bit-duration interval and t is in seconds. Both u0(t) and u1(t) are zero outside the interval 0 ≤ t ≤ T. With a matched filter (correlator) based receiver, the smallest positive value of T (in milliseconds) required to have u0(t) and u1(t) uncorrelated is

In binary frequency shift keying (FSK), the given signal waveforms are

1.	In binary frequency shift keying (FSK), the given signal waveforms areu0(t) = 5 cos(20000πt); 0 ≤ t ≤ T, andu1(t) = 5 cos(22000πt); 0 ≤ t ≤ Twhere T is the bit-duration interval and t is in seconds. Both u0(t) and u1(t) are zero outside the interval 0 ≤ t ≤ T. With a matched filter (correlator) based receiver, the smallest positive value of T (in milliseconds) required to have u0(t) and u1(t) uncorrelated is
A.	0.25 ms
B.	0.5 ms
C.	0.75 ms
D.	1.0 ms
Answer» C. 0.75 ms

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