For the successful reconstruction of signals :(a) Sampling frequency must be equal to the message signal(b) Sampling frequency must be greater to the message signal(c) Sampling frequency must be less to the message signal(d) Sampling frequency must be greater than or equal to the message signalI had been asked this question by my school teacher while I was bunking the class.Question is from Signal Reconstruction in section Digital Control Systems of Control Systems

For the successful reconstruction of signals :(a) Sampling frequency m

1.	For the successful reconstruction of signals :(a) Sampling frequency must be equal to the message signal(b) Sampling frequency must be greater to the message signal(c) Sampling frequency must be less to the message signal(d) Sampling frequency must be greater than or equal to the message signalI had been asked this question by my school teacher while I was bunking the class.Question is from Signal Reconstruction in section Digital Control Systems of Control Systems
Answer» Right option is (d) Sampling frequency MUST be greater than or EQUAL to the message signal To explain: Reconstruction of signals refers to the CONVERSION of the discrete time signals into continuous tiem signals and for the succesful reconstruction of signals sampling frequency must be greater than or equal to the message signal but ideally it is always preferred to be greater.

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