Final answer:
Different signals can have the same autocorrelation and power spectrum.
Step-by-step explanation:
True. Different signals can have the same autocorrelation and power spectrum. Autocorrelation measures the similarity between a signal and a time-delayed version of itself, while the power spectrum represents the distribution of signal power across different frequencies. Two signals can have different time-domain representations but still have the same autocorrelation and power spectrum if their frequency components are similar. For example, two signals with different shapes but identical frequency content will have the same autocorrelation and power spectrum.