象)Sgnl Energy vs. power signal 7/2 Energy Er E=x(odt=lim x(dt T T/2 > Power P=lim「x()at T→∞ A signal is an energy signal iff energy is limited A signal is a power signal iff power is limited Communications EngineeringCommunications Engineering 7 Signal Energy vs. power signal ➢ Energy ➢ Power ➢ A signal is an energy signal iff energy is limited ➢ A signal is a power signal iff power is limited