a. A signal is sampled with a sampling frequency of 44.1 KHz. A design engineer

Question

a. A signal is sampled with a sampling frequency of 44.1 KHz. A design engineer claim that the sampled signal is perfectly reconstructed by low pass filter in each of the following cases: Whether his claim is correct? Give justifications. i. The band limiting low pass filter frequency response is zero for all frequencies above 16KHz. ii. The band limiting low pass filter frequency response is zero for all frequencies above 26KHz. iii. The band limiting low pass filter frequency response is zero for all frequencies above 22.05 KHz. b. Compare Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK) in terms of error performance and data rate.

Explanation / Answer

(a) Yes, In low frequency applications (up to 100 KHz), passive filters are generally constructed using simple RC( Resistor-Capacitor) networks.

(b) Yes.

(c) Yes.

(d) No

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